Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Pendleton, OR
Issued by NWS Pendleton, OR
131
FNUS56 KPDT 311937
FWFPDT
Fire Weather Planning Forecast for NE Oregon and SE Washington
National Weather Service Pendleton OR
1237 PM PDT Mon Aug 31 2026
.DISCUSSION...Light winds and a drying/warming trend through
tomorrow. Increasing westerly winds across the area latter half
of Tuesday through Wednesday, with elevated fire weather
conditions in southern zones late Tuesday. Isolated to scattered
showers will develop late Tuesday across mountain areas, becoming
more widespread through Thursday. Isolated thunderstorms will be
possible across Blues in the afternoons each day, and Cascades
Thursday.
***Thunderstorms imply strong gusty winds ***
***Winds are 20 foot 10 minute averages ***
***CWR: Chance of wetting rain 0.10 or greater ***
***Ventilation Index is derived from transport wind
multiplied by the mixing height in 100`s of ft.
Categories are a generalized indicator and users
are encourage to develop criteria that are
suitable and representative of dispersion
conditions in their local area of interest.
Categories: low (< 200), moderate (200-500),
high (500-700), and very high (> 700).
-Note: Max transport winds may not occur
at the same time as max mixing height. ***
WAZ695-011130-
East Washington South Central Cascade Mountains-
1237 PM PDT Mon Aug 31 2026
.TONIGHT...
* Sky/weather.........Partly cloudy then becoming mostly cloudy.
* Min temperature.....49-55.
* Max humidity........53-68 percent.
* Humidity recovery...Moderate.
* 20-foot winds.......
* Valleys/lwr slopes...Drainage winds less than 5 mph.
* Ridges/upr slopes....light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......Near surface.
* Transport winds.....Southeast around 5 mph shifting to the west
after midnight.
* Ventilation Index...Low (69-111) decreasing to low (25-28) after
midnight.
.TUESDAY...
* Sky/weather.........Mostly cloudy then becoming partly cloudy.
* Max temperature.....72-80...except 63-72 ridges.
* Min humidity........36-51 percent.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 1 to 6 mph.
* Ridges/upr slopes....West winds 1 to 6 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......8000 ft agl.
* Transport winds.....West 5 to 10 mph.
* Ventilation Index...Low (34-68) increasing to moderate (228-404)
in the afternoon.
.TUESDAY NIGHT...
* Sky/weather.........Mostly cloudy. A chance of showers in the
evening. A slight chance of showers after midnight.
* Min temperature.....46-51...except 41-46 ridges.
* Max humidity........78-93 percent.
* Humidity recovery...Excellent.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 4 to 9 mph.
* Ridges/upr slopes....West winds 4 to 9 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......500 ft agl.
* Transport winds.....West 10 to 15 mph.
* Ventilation Index...Low to moderate (169-273) decreasing to low
(54-106) after midnight.
.WEDNESDAY...
* Sky/weather.........Mostly cloudy. A slight chance of showers in
the morning, then showers likely in the afternoon.
* Max temperature.....58-67...except 48-58 ridges.
* Min humidity........55-70 percent...except 68-83 percent ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Southwest winds 2 to 7 mph.
* Ridges/upr slopes....Southwest winds 2 to 7 mph.
* CWR.................50 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......7000 ft agl.
* Transport winds.....Southwest 10 to 15 mph.
* Ventilation Index...Low (79-137) increasing to moderate to high
(396-618) in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Showers and a slight chance of thunderstorms. Lows
39 to 47. Highs 47 to 61. Southwest winds 1 to 6 mph.
.FRIDAY...Mostly cloudy with a chance of showers. Lows 38 to 45.
Highs 51 to 64. West winds up to 5 mph.
.SATURDAY...Mostly cloudy with a chance of showers. Lows 40 to
47. Highs 56 to 69. Terrain driven winds less than 5 mph.
.SUNDAY...Mostly cloudy with a slight chance of showers. Lows
44 to 50. Highs 58 to 71. Terrain driven winds less than 5 mph.
.LABOR DAY...Partly cloudy with a chance of showers. Lows 45 to
51. Highs 59 to 72. West winds up to 5 mph.
$$
WAZ690-011130-
Kittitas Valley-
1237 PM PDT Mon Aug 31 2026
.TONIGHT...
* Sky/weather.........Partly cloudy then becoming mostly cloudy.
* Min temperature.....56-62.
* Max humidity........44-59 percent...except 39-48 percent ridges.
* Humidity recovery...Moderate...except Poor ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Drainage winds less than 5 mph.
* Ridges/upr slopes....light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....East around 5 mph shifting to the northwest
after midnight.
* Ventilation Index...Low (36-86) decreasing to low (25-32) after
midnight.
.TUESDAY...
* Sky/weather.........Mostly cloudy then becoming partly cloudy.
* Max temperature.....80-86...except 70-80 ridges.
* Min humidity........25-32 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Northwest winds up to 5 mph shifting to the
southwest 2 to 7 mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming southwest 1
to 6 mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......8000 ft agl.
* Transport winds.....Northwest around 10 mph shifting to the
southwest in the afternoon.
* Ventilation Index...Low (51-81) increasing to moderate (325-449)
in the afternoon.
.TUESDAY NIGHT...
* Sky/weather.........Mostly cloudy. A slight chance of showers
after midnight.
* Min temperature.....51-57.
* Max humidity........70-85 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 7 to 13 mph.
* Ridges/upr slopes....West winds 7 to 13 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......500 ft agl.
* Transport winds.....Northwest around 15 mph.
* Ventilation Index...Moderate (255-393) decreasing to low (42-82)
after midnight.
.WEDNESDAY...
* Sky/weather.........Mostly cloudy. A chance of showers in the
afternoon.
* Max temperature.....67-74...except 57-67 ridges.
* Min humidity........43-57 percent.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 1 to 6 mph increasing to south 7
to 13 mph in the afternoon.
* Ridges/upr slopes....West winds 1 to 6 mph increasing to
southwest 8 to 14 mph in the afternoon.
* CWR.................10 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......9000 ft agl.
* Transport winds.....Southwest 10 to 15 mph.
* Ventilation Index...Low (52-96) increasing to high to very high
(669-951) in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Mostly cloudy with a chance of showers. Lows 48 to
53. Highs 61 to 68. Southwest winds 5 to 11 mph.
.FRIDAY...Mostly cloudy with a chance of showers. Lows 45 to 50.
Highs 63 to 70. West winds 1 to 6 mph.
.SATURDAY...A slight chance of showers. Mostly cloudy. Lows 47 to
53. Highs 67 to 74. Terrain driven winds less than 5 mph.
.SUNDAY...A slight chance of showers. Mostly cloudy. Lows 50 to
56. Highs 69 to 76. Terrain driven winds less than 5 mph.
.LABOR DAY...Partly cloudy with a slight chance of showers. Lows
51 to 57. Highs 71 to 78. West winds up to 5 mph.
$$
WAZ694-011130-
Yakama Alpine District-
1237 PM PDT Mon Aug 31 2026
.TONIGHT...
* Sky/weather.........Partly cloudy then becoming mostly cloudy.
* Min temperature.....48-56.
* Max humidity........54-69 percent.
* Humidity recovery...Moderate.
* 20-foot winds.......
* Valleys/lwr slopes...Drainage winds less than 5 mph.
* Ridges/upr slopes....light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....East around 5 mph shifting to the northwest
after midnight.
* Ventilation Index...Low (29-65) decreasing to low (25-31) after
midnight.
.TUESDAY...
* Sky/weather.........Mostly cloudy then becoming mostly sunny.
* Max temperature.....74-83...except 65-76 ridges.
* Min humidity........30-45 percent.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 4 to 9 mph.
* Ridges/upr slopes....light less than 5 mph becoming west 3 to 8
mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......7500 ft agl.
* Transport winds.....West around 5 mph increasing to southwest
around 15 mph in the afternoon.
* Ventilation Index...Low (27-65) increasing to moderate (320-482)
in the afternoon.
.TUESDAY NIGHT...
* Sky/weather.........Mostly cloudy. A slight chance of showers
after midnight.
* Min temperature.....44-52...except 42-47 ridges.
* Max humidity........80-95 percent.
* Humidity recovery...Excellent.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 6 to 12 mph.
* Ridges/upr slopes....West winds 6 to 12 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......500 ft agl.
* Transport winds.....West around 15 mph.
* Ventilation Index...Low to moderate (180-290) decreasing to low
(42-72) after midnight.
.WEDNESDAY...
* Sky/weather.........Mostly cloudy. A slight chance of showers in
the morning, then showers in the afternoon.
* Max temperature.....60-68...except 49-61 ridges.
* Min humidity........57-72 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Southwest winds 4 to 10 mph.
* Ridges/upr slopes....Southwest winds 4 to 10 mph.
* CWR.................70 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......6500 ft agl.
* Transport winds.....Southwest around 15 mph.
* Ventilation Index...Low (105-171) increasing to moderate to very
high (367-741) in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Showers and a slight chance of thunderstorms. Lows
40 to 48. Highs 50 to 64. Southwest winds 3 to 8 mph.
.FRIDAY...Mostly cloudy with a chance of showers. Lows 38 to 46.
Highs 54 to 67. West winds 2 to 7 mph.
.SATURDAY...Mostly cloudy with a chance of showers. Lows 40 to
48. Highs 58 to 71. Terrain driven winds less than 5 mph.
.SUNDAY...A chance of showers. Partly cloudy. Lows 43 to 51.
Highs 61 to 73. Terrain driven winds less than 5 mph.
.LABOR DAY...Partly cloudy with a slight chance of showers. Lows
44 to 52. Highs 62 to 75. West winds 1 to 5 mph.
$$
ORZ691-WAZ691-011130-
Lower Columbia Basin of Oregon-Lower Columbia Basin of Washington-
1237 PM PDT Mon Aug 31 2026
.TONIGHT...
* Sky/weather.........Partly cloudy then becoming mostly cloudy.
* Min temperature.....55-60.
* Max humidity........46-61 percent.
* Humidity recovery...Moderate.
* 20-foot winds.......
* Valleys/lwr slopes...North winds 2 to 7 mph shifting to the west
1 to 6 mph after midnight.
* Ridges/upr slopes....North winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....North around 10 mph.
* Ventilation Index...Low (75-141) decreasing to low (25-36) after
midnight.
.TUESDAY...
* Sky/weather.........Mostly cloudy then becoming partly cloudy.
* Max temperature.....79-87.
* Min humidity........26-34 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Southwest winds 5 to 11 mph.
* Ridges/upr slopes....Southwest winds 5 to 11 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......8500 ft agl.
* Transport winds.....West 10 to 15 mph.
* Ventilation Index...Low (33-97) increasing to moderate to high
(335-529) in the afternoon.
.TUESDAY NIGHT...
* Sky/weather.........Mostly cloudy. A chance of showers after
midnight.
* Min temperature.....50-56.
* Max humidity........70-85 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...Southwest winds 8 to 14 mph with gusts up to
25 mph.
* Ridges/upr slopes....Southwest winds 9 to 15 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......500 ft agl.
* Transport winds.....West around 15 mph.
* Ventilation Index...Moderate (205-419) decreasing to low (47-177)
after midnight.
.WEDNESDAY...
* Sky/weather.........Mostly cloudy. A chance of showers.
* Max temperature.....69-78...except 64-73 ridges.
* Min humidity........38-51 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Southwest winds 5 to 11 mph.
* Ridges/upr slopes....Southwest winds 7 to 13 mph.
* CWR.................10 percent.
* Chc of lightning....0 percent.
* Mixing height.......9000 ft agl.
* Transport winds.....Southwest around 15 mph.
* Ventilation Index...Low (74-172) increasing to high to very high
(654-990) in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Mostly cloudy with showers likely. Lows 49 to 54.
Highs 64 to 71. Southwest winds 5 to 11 mph.
.FRIDAY...A chance of showers. Mostly cloudy. Lows 45 to 50.
Highs 65 to 73. Southwest winds 3 to 8 mph.
.SATURDAY...A chance of showers. Partly cloudy. Lows 47 to 52.
Highs 68 to 76. West winds 1 to 5 mph.
.SUNDAY...Partly cloudy with a slight chance of showers. Lows
48 to 54. Highs 70 to 77. Northwest winds 1 to 6 mph.
.LABOR DAY...Partly cloudy with a slight chance of showers. Lows
49 to 55. Highs 73 to 80. Southwest winds 2 to 7 mph.
$$
ORZ692-WAZ692-011130-
Northern Blue Mountains of Oregon-Blue Mountains of Washington-
1237 PM PDT Mon Aug 31 2026
.TONIGHT...
* Sky/weather.........Partly cloudy then becoming mostly cloudy.
Patchy smoke in the evening.
* Min temperature.....50-60.
* Max humidity........33-42 percent.
* Humidity recovery...Poor.
* 20-foot winds.......
* Valleys/lwr slopes...East winds up to 5 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....East winds 1 to 6 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....East around 10 mph.
* Ventilation Index...Low (80-150) decreasing to low (27-41) after
midnight.
.TUESDAY...
* Sky/weather.........Mostly cloudy.
* Max temperature.....76-84...except 70-76 ridges.
* Min humidity........27-34 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph.
* Ridges/upr slopes....light less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......7000 ft agl.
* Transport winds.....South around 5 mph increasing to southwest
around 15 mph in the afternoon.
* Ventilation Index...Low (35-57) increasing to moderate to high
(292-674) in the afternoon.
.TUESDAY NIGHT...
* Sky/weather.........Mostly cloudy. A chance of showers after
midnight.
* Min temperature.....44-52.
* Max humidity........82-97 percent.
* Humidity recovery...Excellent.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 2 to 7 mph.
* Ridges/upr slopes....West winds 3 to 8 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......500 ft agl.
* Transport winds.....West around 10 mph.
* Ventilation Index...Low (75-185) decreasing to low (40-62) after
midnight.
.WEDNESDAY...
* Sky/weather.........Mostly cloudy. A chance of showers.
* Max temperature.....65-74...except 58-64 ridges.
* Min humidity........43-58 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Southwest winds 2 to 7 mph.
* Ridges/upr slopes....Southwest winds 2 to 7 mph in the morning
becoming light less than 5 mph.
* CWR.................30 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......8500 ft agl.
* Transport winds.....Southwest around 10 mph.
* Ventilation Index...Low (48-112) increasing to moderate to high
(394-584) in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Showers and a slight chance of thunderstorms. Lows
44 to 50. Highs 55 to 66. Southwest winds 2 to 7 mph.
.FRIDAY...Mostly cloudy with a chance of showers. Lows 40 to 47.
Highs 58 to 68. Terrain driven winds less than 5 mph.
.SATURDAY...Mostly cloudy with a chance of showers. Lows 40 to
49. Highs 63 to 72. Terrain driven winds less than 5 mph.
.SUNDAY...A chance of showers. Mostly cloudy. Lows 42 to 51.
Highs 64 to 73. Terrain driven winds less than 5 mph.
.LABOR DAY...A chance of showers. Mostly cloudy. Lows 43 to 52.
Highs 66 to 76. Terrain driven winds less than 5 mph.
$$
ORZ693-WAZ693-011130-
Canyon Grasslands of Wallowa County-
Southeast Washington Grande Ronde Valley-
1237 PM PDT Mon Aug 31 2026
.TONIGHT...
* Sky/weather.........Partly cloudy then becoming mostly cloudy.
* Min temperature.....50-60.
* Max humidity........30-43 percent.
* Humidity recovery...Poor.
* 20-foot winds.......
* Valleys/lwr slopes...Southeast winds up to 5 mph.
* Ridges/upr slopes....Southeast winds 1 to 6 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....Southeast around 5 mph.
* Ventilation Index...Low (85-153) decreasing to low (25-32) after
midnight.
.TUESDAY...
* Sky/weather.........Mostly cloudy. A slight chance of showers and
thunderstorms in the afternoon.
* Max temperature.....78-87...except 72-79 ridges.
* Min humidity........21-28 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Southwest winds 4 to 9 mph.
* Ridges/upr slopes....Southwest winds 4 to 10 mph.
* CWR.................0 percent.
* Chc of lightning....20 percent (slight chance).
* Mixing height.......7500 ft agl.
* Transport winds.....South 10 to 15 mph.
* Ventilation Index...Low (25-92) increasing to high to very high
(644-890) in the afternoon.
.TUESDAY NIGHT...
* Sky/weather.........Mostly cloudy. Patchy smoke after midnight.
Showers likely after midnight.
* Min temperature.....43-53.
* Max humidity........77-92 percent.
* Humidity recovery...Excellent...except Good ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Southeast winds 1 to 5 mph shifting to the
west 2 to 5 mph after midnight.
* Ridges/upr slopes....Southeast winds 2 to 6 mph shifting to the
west after midnight.
* CWR.................10 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......500 ft agl.
* Transport winds.....West 5 to 10 mph.
* Ventilation Index...Low (25-115) decreasing to low (26-38) after
midnight.
.WEDNESDAY...
* Sky/weather.........Mostly cloudy. Showers likely in the morning,
then a chance of showers and a slight chance of thunderstorms in
the afternoon.
* Max temperature.....65-73...except 59-65 ridges.
* Min humidity........31-42 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming southwest 4
to 9 mph in the afternoon.
* Ridges/upr slopes....Southwest winds 2 to 5 mph increasing to 5
to 11 mph in the afternoon.
* CWR.................60 percent.
* Chc of lightning....20 percent (slight chance).
* Mixing height.......7500 ft agl.
* Transport winds.....Southwest around 10 mph.
* Ventilation Index...Low (39-71) increasing to moderate to high
(375-691) in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Showers and a chance of thunderstorms. Lows 43 to 52.
Highs 58 to 67. Southwest winds 4 to 9 mph.
.FRIDAY...Mostly cloudy with showers likely and a slight chance
of thunderstorms. Lows 38 to 48. Highs 61 to 70. Terrain driven
winds less than 5 mph.
.SATURDAY...Mostly cloudy with a chance of showers. Lows 39 to
50. Highs 66 to 75. Terrain driven winds less than 5 mph.
.SUNDAY...Mostly cloudy with a chance of showers. Lows 40 to 52.
Highs 68 to 76. Terrain driven winds less than 5 mph.
.LABOR DAY...Mostly cloudy with a chance of showers. Lows 41 to
53. Highs 69 to 78. Terrain driven winds less than 5 mph.
$$
ORZ701-011130-
Eastern Columbia River Gorge of Oregon-
1237 PM PDT Mon Aug 31 2026
.TONIGHT...
* Sky/weather.........Partly cloudy then becoming mostly cloudy.
* Min temperature.....51-57.
* Max humidity........70-85 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...Drainage winds less than 5 mph becoming west
3 to 8 mph after midnight. In the eastern Columbia River
Gorge, southwest winds 1 to 5 mph shifting to the west 5 to
11 mph after midnight.
* Ridges/upr slopes....light winds less than 5 mph becoming west 3
to 8 mph after midnight.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....Northwest 5 to 10 mph.
* Ventilation Index...Low (25-78) decreasing to low (32-52) after
midnight.
.TUESDAY...
* Sky/weather.........Partly cloudy. Patchy smoke in the afternoon.
* Max temperature.....75-81.
* Min humidity........38-53 percent.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 6 to 12 mph...except west 8 to 14
mph in the eastern Columbia River Gorge. Gusts to 25 mph in
the afternoon. In the eastern Columbia River Gorge, gusts to
30 mph.
* Ridges/upr slopes....West winds 6 to 12 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......6000 ft agl.
* Transport winds.....West 10 to 15 mph.
* Ventilation Index...Low (44-134) increasing to moderate to high
(402-506) in the afternoon.
.TUESDAY NIGHT...
* Sky/weather.........Mostly cloudy. Patchy smoke in the evening.
* Min temperature.....47-53.
* Max humidity........79-94 percent.
* Humidity recovery...Excellent.
* 20-foot winds.......
* Valleys/lwr slopes...Gusts to 30 mph in the evening. West winds 6
to 12 mph. In the eastern Columbia River Gorge, gusts to 30
mph.
* Ridges/upr slopes....West winds 5 to 11 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....West around 20 mph decreasing to around 10
mph after midnight.
* Ventilation Index...Moderate (214-410) decreasing to low (33-61)
after midnight.
.WEDNESDAY...
* Sky/weather.........Mostly cloudy. A slight chance of showers in
the morning, then showers in the afternoon.
* Max temperature.....65-70.
* Min humidity........58-73 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming southwest 3
to 8 mph in the afternoon. In the eastern Columbia River
Gorge, upslope less than 5 mph.
* Ridges/upr slopes....light less than 5 mph becoming southwest 3
to 8 mph in the afternoon.
* CWR.................80 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......6500 ft agl.
* Transport winds.....Southwest 5 to 10 mph.
* Ventilation Index...Low (37-77) increasing to low to high
(196-614) in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Showers likely and a slight chance of thunderstorms.
Lows 46 to 52. Highs 62 to 67. Southwest winds 1 to 6 mph.
.FRIDAY...Mostly cloudy with a chance of showers. Lows 44 to 50.
Highs 65 to 70. West winds 1 to 6 mph.
.SATURDAY...Mostly cloudy with a chance of showers. Lows 45 to
51. Highs 69 to 74. Terrain driven winds less than 5 mph.
.SUNDAY...Partly cloudy with a chance of showers. Lows 47 to 53.
Highs 70 to 75. Terrain driven winds less than 5 mph.
.LABOR DAY...Partly cloudy with a slight chance of showers. Lows
49 to 55. Highs 73 to 78. West winds up to 5 mph.
$$
ORZ702-011130-
East Slopes of the Mt. Hood National Forest-
1237 PM PDT Mon Aug 31 2026
.TONIGHT...
* Sky/weather.........Partly cloudy then becoming mostly cloudy.
Patchy smoke after midnight.
* Min temperature.....47-54.
* Max humidity........68-83 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...Drainage winds less than 5 mph.
* Ridges/upr slopes....light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....Northwest 5 to 10 mph.
* Ventilation Index...Low (34-80) decreasing to low (32-42) after
midnight.
.TUESDAY...
* Sky/weather.........Partly cloudy. Patchy smoke.
* Max temperature.....72-80...except 65-75 ridges.
* Min humidity........36-47 percent...except 45-60 percent ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming west 2 to 7
mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming west 2 to 7
mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......6000 ft agl.
* Transport winds.....West 10 to 15 mph.
* Ventilation Index...Low (45-73) increasing to moderate (292-398)
in the afternoon.
.TUESDAY NIGHT...
* Sky/weather.........Mostly cloudy. Patchy smoke in the evening. A
slight chance of showers.
* Min temperature.....42-49.
* Max humidity........80-95 percent.
* Humidity recovery...Excellent.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 3 to 8 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....West winds 1 to 6 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....West around 20 mph decreasing to around 10
mph after midnight.
* Ventilation Index...Moderate (220-348) decreasing to low (40-78)
after midnight.
.WEDNESDAY...
* Sky/weather.........Mostly cloudy. A chance of showers in the
morning, then showers in the afternoon.
* Max temperature.....59-67...except 53-63 ridges.
* Min humidity........60-75 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming southwest 1
to 6 mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming southwest 1
to 5 mph in the afternoon.
* CWR.................90 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......6000 ft agl.
* Transport winds.....Southwest 10 to 15 mph.
* Ventilation Index...Low (82-162) increasing to moderate to high
(405-663) in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Showers and a slight chance of thunderstorms. Lows
41 to 48. Highs 51 to 64. Southwest winds up to 5 mph.
.FRIDAY...Mostly cloudy with a chance of showers. Lows 39 to 46.
Highs 54 to 66. Terrain driven winds less than 5 mph.
.SATURDAY...Mostly cloudy with a chance of showers. Lows 41 to
48. Highs 59 to 70. Terrain driven winds less than 5 mph.
.SUNDAY...A chance of showers. Partly cloudy. Lows 44 to 51.
Highs 60 to 71. Terrain driven winds less than 5 mph.
.LABOR DAY...A chance of showers. Partly cloudy. Lows 45 to 52.
Highs 63 to 75. Terrain driven winds less than 5 mph.
$$
ORZ695-011130-
Eagle Cap Wilderness-
1237 PM PDT Mon Aug 31 2026
.TONIGHT...
* Sky/weather.........Partly cloudy then becoming mostly cloudy.
Patchy smoke.
* Min temperature.....51-58.
* Max humidity........32-42 percent.
* Humidity recovery...Poor.
* 20-foot winds.......
* Valleys/lwr slopes...Southeast winds 2 to 7 mph.
* Ridges/upr slopes....Southeast winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....Southeast 5 to 10 mph.
* Ventilation Index...Low (73-157) decreasing to low (25-47) after
midnight.
.TUESDAY...
* Sky/weather.........Mostly cloudy. A slight chance of showers and
thunderstorms in the afternoon.
* Max temperature.....73-83...except 62-73 ridges.
* Min humidity........25-35 percent.
* 20-foot winds.......
* Valleys/lwr slopes...South winds 4 to 10 mph.
* Ridges/upr slopes....South winds 5 to 11 mph.
* CWR.................0 percent.
* Chc of lightning....20 percent (slight chance).
* Mixing height.......7000 ft agl.
* Transport winds.....South 15 to 20 mph.
* Ventilation Index...Low (77-173) increasing to very high
(715-953) in the afternoon.
.TUESDAY NIGHT...
* Sky/weather.........Partly cloudy then becoming mostly cloudy.
Patchy smoke. Showers likely after midnight.
* Min temperature.....44-51...except 40-46 ridges.
* Max humidity........76-91 percent.
* Humidity recovery...Excellent.
* 20-foot winds.......
* Valleys/lwr slopes...Southwest winds 2 to 6 mph shifting to the
northwest 1 to 6 mph after midnight.
* Ridges/upr slopes....South winds 3 to 7 mph shifting to the
northwest 2 to 6 mph after midnight.
* CWR.................30 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......500 ft agl.
* Transport winds.....Southwest around 10 mph shifting to the
northwest after midnight.
* Ventilation Index...Low (43-159) decreasing to low (25-40) after
midnight.
.WEDNESDAY...
* Sky/weather.........Mostly cloudy. Showers likely in the morning,
then a chance of showers and a slight chance of thunderstorms in
the afternoon.
* Max temperature.....61-71...except 49-60 ridges.
* Min humidity........35-50 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming south 5 to
11 mph in the afternoon.
* Ridges/upr slopes....Southwest winds 2 to 7 mph shifting to the
south 7 to 13 mph in the afternoon.
* CWR.................30 percent.
* Chc of lightning....20 percent (slight chance).
* Mixing height.......8000 ft agl.
* Transport winds.....Southwest 10 to 15 mph.
* Ventilation Index...Low (25-65) increasing to high to very high
(647-907) in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Showers and a chance of thunderstorms. Lows 38 to 48.
Highs 47 to 62. Southwest winds 7 to 13 mph.
.FRIDAY...Mostly cloudy with showers likely and a slight chance
of thunderstorms. Lows 37 to 45. Highs 51 to 66. Southwest winds
1 to 6 mph.
.SATURDAY...Mostly cloudy with a chance of showers. Lows 38 to
46. Highs 56 to 71. North winds 1 to 5 mph.
.SUNDAY...Mostly cloudy with a chance of showers. Lows 41 to 48.
Highs 58 to 72. Northeast winds 1 to 5 mph.
.LABOR DAY...Mostly cloudy with a chance of showers. Lows 41 to
49. Highs 59 to 74. Southwest winds 1 to 6 mph.
$$
ORZ694-011130-
Grande Ronde Valley of Oregon-
1237 PM PDT Mon Aug 31 2026
.TONIGHT...
* Sky/weather.........Partly cloudy then becoming mostly cloudy.
* Min temperature.....49-55.
* Max humidity........36-44 percent.
* Humidity recovery...Poor.
* 20-foot winds.......
* Valleys/lwr slopes...South winds 1 to 6 mph.
* Ridges/upr slopes....South winds 1 to 6 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....Southeast 5 to 10 mph.
* Ventilation Index...Low (121-183) decreasing to low (25-32) after
midnight.
.TUESDAY...
* Sky/weather.........Mostly cloudy.
* Max temperature.....81-87.
* Min humidity........21-26 percent.
* 20-foot winds.......
* Valleys/lwr slopes...South winds 4 to 9 mph.
* Ridges/upr slopes....South winds 5 to 11 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......7500 ft agl.
* Transport winds.....South 10 to 15 mph.
* Ventilation Index...Low (42-90) increasing to very high (748-898)
in the afternoon.
.TUESDAY NIGHT...
* Sky/weather.........Mostly cloudy. Patchy smoke. Showers likely
after midnight.
* Min temperature.....45-50.
* Max humidity........86-97 percent.
* Humidity recovery...Excellent.
* 20-foot winds.......
* Valleys/lwr slopes...Northwest winds 4 to 10 mph.
* Ridges/upr slopes....Northwest winds 4 to 10 mph.
* CWR.................10 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......500 ft agl.
* Transport winds.....Northwest around 10 mph.
* Ventilation Index...Low (76-178) decreasing to low (35-59) after
midnight.
.WEDNESDAY...
* Sky/weather.........Mostly cloudy. A chance of showers. A slight
chance of thunderstorms in the afternoon.
* Max temperature.....70-75.
* Min humidity........35-42 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Southeast winds 3 to 8 mph.
* Ridges/upr slopes....South winds 4 to 9 mph.
* CWR.................10 percent.
* Chc of lightning....20 percent (slight chance).
* Mixing height.......7500 ft agl.
* Transport winds.....Northwest around 5 mph shifting to the south
in the afternoon.
* Ventilation Index...Low (28-50) increasing to moderate to high
(480-588) in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Showers and a chance of thunderstorms. Lows 43 to 49.
Highs 63 to 68. South winds 5 to 11 mph.
.FRIDAY...Mostly cloudy with showers likely. Lows 38 to 44. Highs
65 to 71. Terrain driven winds less than 5 mph.
.SATURDAY...Mostly cloudy with a chance of showers. Lows 38 to
44. Highs 70 to 76. Terrain driven winds less than 5 mph.
.SUNDAY...Mostly cloudy with a chance of showers. Lows 40 to 45.
Highs 72 to 77. Terrain driven winds less than 5 mph.
.LABOR DAY...A chance of showers. Mostly cloudy. Lows 41 to 46.
Highs 74 to 79. Terrain driven winds less than 5 mph.
$$
ORZ699-011130-
Western Forested Blue Mountains-
1237 PM PDT Mon Aug 31 2026
.TONIGHT...
* Sky/weather.........Partly cloudy then becoming mostly cloudy.
Patchy smoke.
* Min temperature.....50-55.
* Max humidity........29-41 percent.
* Humidity recovery...Poor.
* 20-foot winds.......
* Valleys/lwr slopes...East winds up to 5 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....Southeast winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....Southeast around 10 mph.
* Ventilation Index...Low to moderate (149-277) decreasing to low
(25-43) after midnight.
.TUESDAY...
* Sky/weather.........Mostly cloudy then becoming partly cloudy.
Patchy smoke.
* Max temperature.....77-83...except 71-78 ridges.
* Min humidity........15-27 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming southwest 1
to 6 mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming south 1 to 6
mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......10500 ft agl.
* Transport winds.....South around 5 mph increasing to around 15
mph in the afternoon.
* Ventilation Index...Low (25-59) increasing to high to very high
(685-987) in the afternoon.
.TUESDAY NIGHT...
* Sky/weather.........Mostly cloudy. Patchy smoke. A chance of
showers after midnight.
* Min temperature.....42-48.
* Max humidity........76-91 percent.
* Humidity recovery...Excellent.
* 20-foot winds.......
* Valleys/lwr slopes...Northwest winds 2 to 6 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....West winds 1 to 6 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......500 ft agl.
* Transport winds.....West around 10 mph.
* Ventilation Index...Low to moderate (187-325) decreasing to low
(26-52) after midnight.
.WEDNESDAY...
* Sky/weather.........Mostly cloudy. A chance of showers. A slight
chance of thunderstorms in the afternoon.
* Max temperature.....64-70...except 57-64 ridges.
* Min humidity........34-45 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming southwest 3
to 8 mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming southwest 3
to 8 mph in the afternoon.
* CWR.................10 percent.
* Chc of lightning....20 percent (slight chance).
* Mixing height.......8500 ft agl.
* Transport winds.....Southwest around 5 mph increasing to around
15 mph in the afternoon.
* Ventilation Index...Low (47-79) increasing to very high
(768-1018) in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Showers and a chance of thunderstorms. Lows 40 to 47.
Highs 54 to 63. Southwest winds 4 to 9 mph.
.FRIDAY...Mostly cloudy with showers likely. Lows 37 to 44. Highs
56 to 65. Terrain driven winds less than 5 mph.
.SATURDAY...Mostly cloudy with a chance of showers. Lows 38 to
45. Highs 61 to 70. Terrain driven winds less than 5 mph.
.SUNDAY...A chance of showers. Mostly cloudy. Lows 40 to 47.
Highs 63 to 72. Terrain driven winds less than 5 mph.
.LABOR DAY...A chance of showers. Partly cloudy. Lows 41 to 48.
Highs 66 to 74. Terrain driven winds less than 5 mph.
$$
ORZ696-011130-
John Day Valley-
1237 PM PDT Mon Aug 31 2026
.TONIGHT...
* Sky/weather.........Partly cloudy then becoming mostly cloudy.
* Min temperature.....51-56.
* Max humidity........31-41 percent.
* Humidity recovery...Poor.
* 20-foot winds.......
* Valleys/lwr slopes...Northeast winds 2 to 7 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....Southeast winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....East around 10 mph shifting to the southwest
after midnight.
* Ventilation Index...Low to moderate (136-312) decreasing to low
(25-34) after midnight.
.TUESDAY...
* Sky/weather.........Mostly cloudy then becoming partly cloudy.
Patchy smoke in the afternoon.
* Max temperature.....79-87...except 74-79 ridges.
* Min humidity........12-22 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming southwest 2
to 7 mph in the afternoon.
* Ridges/upr slopes....light less than 5 mph becoming southwest 2
to 6 mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......11000 ft agl.
* Transport winds.....Southwest around 5 mph increasing to south
around 15 mph in the afternoon.
* Ventilation Index...Low (26-42) increasing to very high
(731-1050) in the afternoon.
.TUESDAY NIGHT...
* Sky/weather.........Mostly cloudy. Patchy smoke. A chance of
showers after midnight.
* Min temperature.....44-52.
* Max humidity........69-84 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 4 to 9 mph.
* Ridges/upr slopes....West winds 4 to 9 mph.
* CWR.................10 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......500 ft agl.
* Transport winds.....Northwest 10 to 15 mph.
* Ventilation Index...Moderate (353-487) decreasing to low (38-66)
after midnight.
.WEDNESDAY...
* Sky/weather.........Mostly cloudy. A chance of showers.
* Max temperature.....64-73...except 59-64 ridges.
* Min humidity........33-41 percent.
* 20-foot winds.......
* Valleys/lwr slopes...South winds 1 to 6 mph increasing to
southwest 7 to 13 mph with gusts up to 25 mph in the
afternoon.
* Ridges/upr slopes....Southwest winds 4 to 10 mph.
* CWR.................10 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......9000 ft agl.
* Transport winds.....Southwest around 5 mph increasing to around
20 mph in the afternoon.
* Ventilation Index...Low (40-78) increasing to very high
(961-1050) in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Showers and a slight chance of thunderstorms. Lows
45 to 50. Highs 59 to 67. Southwest winds 5 to 11 mph.
.FRIDAY...Mostly cloudy with a chance of showers. Lows 40 to 46.
Highs 60 to 68. Southwest winds up to 5 mph.
.SATURDAY...Mostly cloudy with a chance of showers. Lows 41 to
47. Highs 64 to 73. Terrain driven winds less than 5 mph.
.SUNDAY...A chance of showers. Partly cloudy. Lows 42 to 48.
Highs 66 to 75. Terrain driven winds less than 5 mph.
.LABOR DAY...A chance of showers. Partly cloudy. Lows 43 to 50.
Highs 70 to 79. Terrain driven winds less than 5 mph.
$$
ORZ700-011130-
Central Mountains of Oregon-
1237 PM PDT Mon Aug 31 2026
.TONIGHT...
* Sky/weather.........Partly cloudy then becoming mostly cloudy.
Patchy smoke after midnight.
* Min temperature.....44-52.
* Max humidity........46-61 percent...except 39-47 percent ridges.
* Humidity recovery...Moderate...except Poor ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Northwest winds 2 to 7 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....Northwest winds 1 to 5 mph in the evening
becoming light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....Northwest 5 to 10 mph.
* Ventilation Index...Low to moderate (156-396) decreasing to low
(25-34) after midnight.
.TUESDAY...
* Sky/weather.........Partly cloudy. Patchy smoke.
* Max temperature.....78-83...except 71-78 ridges.
* Min humidity........14-29 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Southwest winds 4 to 9 mph.
* Ridges/upr slopes....Southwest winds 4 to 9 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......10500 ft agl.
* Transport winds.....Southwest around 5 mph increasing to around
15 mph in the afternoon.
* Ventilation Index...Low (25-70) increasing to high to very high
(616-1050) in the afternoon.
.TUESDAY NIGHT...
* Sky/weather.........Mostly cloudy. Patchy smoke. A slight chance
of showers.
* Min temperature.....38-48.
* Max humidity........78-93 percent.
* Humidity recovery...Excellent.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 4 to 9 mph.
* Ridges/upr slopes....West winds 4 to 9 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......500 ft agl.
* Transport winds.....West 10 to 15 mph.
* Ventilation Index...Moderate (285-459) decreasing to low (32-80)
after midnight.
.WEDNESDAY...
* Sky/weather.........Mostly cloudy. Showers likely in the
afternoon.
* Max temperature.....62-68...except 56-61 ridges.
* Min humidity........38-53 percent.
* 20-foot winds.......
* Valleys/lwr slopes...South winds 4 to 9 mph increasing to
southwest 10 to 16 mph with gusts up to 30 mph in the
afternoon.
* Ridges/upr slopes....South winds 6 to 12 mph.
* CWR.................30 percent.
* Chc of lightning....0 percent.
* Mixing height.......8000 ft agl.
* Transport winds.....Southwest around 10 mph increasing to around
20 mph in the afternoon.
* Ventilation Index...Low (76-164) increasing to very high
(926-1050) in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Showers. Lows 37 to 47. Highs 59 to 65. Southwest
winds 7 to 13 mph.
.FRIDAY...Mostly cloudy with a chance of showers. Lows 32 to 43.
Highs 60 to 66. Southwest winds 2 to 7 mph.
.SATURDAY...Mostly cloudy with a chance of showers. Lows 33 to
44. Highs 64 to 70. Northwest winds up to 5 mph.
.SUNDAY...Partly cloudy with a chance of showers. Lows 34 to 46.
Highs 66 to 71. West winds up to 5 mph.
.LABOR DAY...A chance of showers. Partly cloudy. Lows 35 to 47.
Highs 70 to 76. West winds 1 to 6 mph.
$$
ORZ703-011130-
Warm Springs Reservation-
1237 PM PDT Mon Aug 31 2026
.TONIGHT...
* Sky/weather.........Partly cloudy then becoming mostly cloudy.
Patchy smoke.
* Min temperature.....48-54.
* Max humidity........61-76 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...Northwest winds 2 to 7 mph.
* Ridges/upr slopes....Northwest winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....Northwest around 10 mph.
* Ventilation Index...Low (113-189) decreasing to low (30-46) after
midnight.
.TUESDAY...
* Sky/weather.........Partly cloudy. Patchy smoke.
* Max temperature.....74-84...except 61-72 ridges.
* Min humidity........31-45 percent...except 45-60 percent ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming west 6 to
12 mph in the afternoon.
* Ridges/upr slopes....West winds 2 to 5 mph increasing to 5 to 11
mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......7500 ft agl.
* Transport winds.....West 10 to 15 mph.
* Ventilation Index...Low (41-75) increasing to moderate to high
(428-588) in the afternoon.
.TUESDAY NIGHT...
* Sky/weather.........Mostly cloudy. Patchy smoke in the evening. A
slight chance of showers.
* Min temperature.....48-53...except 43-48 ridges.
* Max humidity........73-82 percent...except 79-94 percent ridges.
* Humidity recovery...Good...except Excellent ridges.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 4 to 10 mph.
* Ridges/upr slopes....West winds 4 to 10 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......500 ft agl.
* Transport winds.....West around 20 mph decreasing to around 10
mph after midnight.
* Ventilation Index...Moderate (241-403) decreasing to low (25-74)
after midnight.
.WEDNESDAY...
* Sky/weather.........Mostly cloudy. A slight chance of showers in
the morning, then showers in the afternoon.
* Max temperature.....61-70...except 49-59 ridges.
* Min humidity........51-66 percent...except 64-79 percent ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Southwest winds 1 to 5 mph increasing to 5
to 11 mph in the afternoon.
* Ridges/upr slopes....Southwest winds 4 to 9 mph.
* CWR.................80 percent.
* Chc of lightning....0 percent.
* Mixing height.......7000 ft agl.
* Transport winds.....Southwest 10 to 15 mph.
* Ventilation Index...Low (46-138) increasing to high to very high
(610-788) in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Showers and a slight chance of thunderstorms. Lows
42 to 50. Highs 55 to 67. Southwest winds 4 to 9 mph.
.FRIDAY...Mostly cloudy with a chance of showers. Lows 41 to 47.
Highs 58 to 68. Southwest winds 1 to 6 mph.
.SATURDAY...Mostly cloudy with a chance of showers. Lows 43 to
48. Highs 62 to 72. Terrain driven winds less than 5 mph.
.SUNDAY...A chance of showers. Partly cloudy. Lows 46 to 51.
Highs 64 to 73. North winds 1 to 6 mph.
.LABOR DAY...A chance of showers. Partly cloudy. Lows 47 to 52.
Highs 68 to 77. West winds 1 to 6 mph.
$$
ORZ704-011130-
Northern Deschutes National Forest-
1237 PM PDT Mon Aug 31 2026
.TONIGHT...
* Sky/weather.........Partly cloudy then becoming mostly cloudy.
Patchy smoke.
* Min temperature.....42-50.
* Max humidity........66-81 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...Northwest winds 1 to 5 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....Northwest winds 2 to 6 mph in the evening
becoming light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....Northwest around 10 mph.
* Ventilation Index...Low to moderate (185-259) decreasing to low
(28-36) after midnight.
.TUESDAY...
* Sky/weather.........Partly cloudy. Patchy smoke. A slight chance
of showers in the afternoon.
* Max temperature.....73-78...except 59-70 ridges.
* Min humidity........39-47 percent...except 51-66 percent ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming west 4 to 9
mph in the afternoon.
* Ridges/upr slopes....Southwest winds 1 to 5 mph shifting to the
west 5 to 11 mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......6500 ft agl.
* Transport winds.....Southwest around 5 mph increasing to west
around 15 mph in the afternoon.
* Ventilation Index...Low (46-64) increasing to moderate to high
(411-527) in the afternoon.
.TUESDAY NIGHT...
* Sky/weather.........Mostly cloudy. A chance of showers.
* Min temperature.....39-47.
* Max humidity........80-95 percent.
* Humidity recovery...Excellent.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 4 to 9 mph.
* Ridges/upr slopes....West winds 4 to 9 mph.
* CWR.................10 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......500 ft agl.
* Transport winds.....West around 20 mph decreasing to around 10
mph after midnight.
* Ventilation Index...Moderate (245-385) decreasing to low (32-62)
after midnight.
.WEDNESDAY...
* Sky/weather.........Mostly cloudy. A chance of showers in the
morning, then showers in the afternoon.
* Max temperature.....59-64...except 46-56 ridges.
* Min humidity........56-68 percent...except 68-83 percent ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming southwest 3
to 7 mph in the afternoon.
* Ridges/upr slopes....Southwest winds 5 to 11 mph.
* CWR.................90 percent.
* Chc of lightning....0 percent.
* Mixing height.......6000 ft agl.
* Transport winds.....Southwest 10 to 15 mph.
* Ventilation Index...Low (74-192) increasing to high (582-672) in
the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Showers and a slight chance of thunderstorms. Lows
37 to 45. Highs 48 to 62. Southwest winds 6 to 12 mph.
.FRIDAY...Mostly cloudy with a chance of showers. Lows 35 to 43.
Highs 52 to 64. West winds 1 to 6 mph.
.SATURDAY...Mostly cloudy with a chance of showers. Lows 35 to
44. Highs 57 to 68. Terrain driven winds less than 5 mph.
.SUNDAY...Mostly cloudy with a chance of showers. Lows 38 to 46.
Highs 59 to 70. Terrain driven winds less than 5 mph.
.LABOR DAY...A chance of showers. Partly cloudy. Lows 39 to 47.
Highs 63 to 75. Terrain driven winds less than 5 mph.
$$
ORZ705-011130-
Southern Deschutes National Forest-
1237 PM PDT Mon Aug 31 2026
.TONIGHT...
* Sky/weather.........Partly cloudy then becoming mostly cloudy.
Patchy smoke after midnight.
* Min temperature.....37-46.
* Max humidity........67-82 percent.
* Humidity recovery...Good...except Moderate ridges.
* 20-foot winds.......
* Valleys/lwr slopes...Northwest winds 1 to 6 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....Northwest winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....Northwest 5 to 10 mph.
* Ventilation Index...Low to moderate (172-286) decreasing to low
(25-33) after midnight.
.TUESDAY...
* Sky/weather.........Partly cloudy. Patchy smoke in the morning. A
slight chance of showers in the afternoon.
* Max temperature.....72-77...except 60-71 ridges.
* Min humidity........29-44 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Upslope less than 5 mph becoming southwest 3
to 7 mph in the afternoon.
* Ridges/upr slopes....Southwest winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......10000 ft agl.
* Transport winds.....Southwest around 5 mph increasing to around
15 mph in the afternoon.
* Ventilation Index...Low (48-84) increasing to high to very high
(558-988) in the afternoon.
.TUESDAY NIGHT...
* Sky/weather.........Mostly cloudy. A chance of showers.
* Min temperature.....33-41.
* Max humidity........86-100 percent.
* Humidity recovery...Excellent.
* 20-foot winds.......
* Valleys/lwr slopes...Southwest winds 2 to 7 mph.
* Ridges/upr slopes....Southwest winds 2 to 7 mph.
* CWR.................10 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......500 ft agl.
* Transport winds.....West 10 to 15 mph.
* Ventilation Index...Moderate (227-349) decreasing to low (30-52)
after midnight.
.WEDNESDAY...
* Sky/weather.........Mostly cloudy. A chance of showers in the
morning, then showers in the afternoon.
* Max temperature.....57-62...except 46-55 ridges.
* Min humidity........56-71 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Southwest winds 6 to 12 mph.
* Ridges/upr slopes....Southwest winds 7 to 13 mph.
* CWR.................80 percent.
* Chc of lightning....0 percent.
* Mixing height.......5500 ft agl.
* Transport winds.....Southwest 15 to 20 mph.
* Ventilation Index...Low to moderate (132-214) increasing to high
to very high (699-987) in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Showers and a slight chance of thunderstorms. Lows
33 to 41. Highs 50 to 60. Southwest winds 6 to 12 mph.
.FRIDAY...Mostly cloudy with a chance of showers and a slight
chance of thunderstorms. Lows 28 to 37. Highs 53 to 62. Southwest
winds 1 to 6 mph.
.SATURDAY...Mostly cloudy with a chance of showers and a slight
chance of thunderstorms. Lows 29 to 39. Highs 58 to 66. Terrain
driven winds less than 5 mph.
.SUNDAY...Mostly cloudy with a chance of showers. Lows 30 to 41.
Highs 60 to 68. Terrain driven winds less than 5 mph.
.LABOR DAY...Partly cloudy with a slight chance of showers. Lows
31 to 42. Highs 65 to 74. Terrain driven winds less than 5 mph.
$$
ORZ697-011130-
Central Blue Mountains-
1237 PM PDT Mon Aug 31 2026
.TONIGHT...
* Sky/weather.........Partly cloudy then becoming mostly cloudy.
* Min temperature.....48-55.
* Max humidity........28-38 percent.
* Humidity recovery...Poor.
* 20-foot winds.......
* Valleys/lwr slopes...Southeast winds 1 to 5 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....Southeast winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....Southeast around 10 mph.
* Ventilation Index...Moderate (204-420) decreasing to low (32-44)
after midnight.
.TUESDAY...
* Sky/weather.........Mostly cloudy then becoming partly cloudy.
Patchy smoke in the afternoon.
* Max temperature.....76-81...except 71-78 ridges.
* Min humidity........12-17 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Southwest winds 2 to 7 mph.
* Ridges/upr slopes....Southwest winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......10500 ft agl.
* Transport winds.....Southwest around 10 mph increasing to south
around 20 mph in the afternoon.
* Ventilation Index...Low (41-59) increasing to very high
(960-1050) in the afternoon.
.TUESDAY NIGHT...
* Sky/weather.........Mostly cloudy. Patchy smoke. A chance of
showers after midnight.
* Min temperature.....40-47.
* Max humidity........70-85 percent.
* Humidity recovery...Excellent...except Good ridges.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 3 to 8 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....West winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......500 ft agl.
* Transport winds.....West 10 to 15 mph.
* Ventilation Index...Moderate (340-414) decreasing to low (34-50)
after midnight.
.WEDNESDAY...
* Sky/weather.........Mostly cloudy. Patchy smoke in the morning. A
chance of showers.
* Max temperature.....59-65.
* Min humidity........33-42 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Southwest winds 4 to 10 mph.
* Ridges/upr slopes....Southwest winds 1 to 6 mph increasing to 6
to 12 mph in the afternoon.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......8500 ft agl.
* Transport winds.....West around 10 mph increasing to southwest
around 20 mph in the afternoon.
* Ventilation Index...Low (78-124) increasing to very high
(979-1050) in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Showers and a slight chance of thunderstorms. Lows
38 to 46. Highs 54 to 60. Southwest winds 4 to 10 mph.
.FRIDAY...Mostly cloudy with a chance of showers. Lows 33 to 42.
Highs 56 to 62. Southwest winds 1 to 6 mph.
.SATURDAY...Mostly cloudy with a chance of showers. Lows 34 to
43. Highs 61 to 67. Northwest winds up to 5 mph.
.SUNDAY...A chance of showers. Partly cloudy. Lows 36 to 45.
Highs 63 to 70. Southeast winds up to 5 mph.
.LABOR DAY...Partly cloudy with a chance of showers. Lows 37 to
46. Highs 65 to 72. West winds up to 5 mph.
$$
ORZ698-011130-
Southern Blue Mountains-
1237 PM PDT Mon Aug 31 2026
.TONIGHT...
* Sky/weather.........Mostly cloudy.
* Min temperature.....47-54.
* Max humidity........30-40 percent.
* Humidity recovery...Poor.
* 20-foot winds.......
* Valleys/lwr slopes...Southeast winds 1 to 5 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....Southeast winds 1 to 5 mph in the evening
becoming light winds less than 5 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....Southeast around 10 mph.
* Ventilation Index...Moderate (265-421) decreasing to low (25-37)
after midnight.
.TUESDAY...
* Sky/weather.........Mostly cloudy then becoming partly cloudy.
Patchy smoke.
* Max temperature.....77-82.
* Min humidity........9-14 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Southwest winds 4 to 9 mph.
* Ridges/upr slopes....Southwest winds 4 to 9 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......10500 ft agl.
* Transport winds.....Southwest around 10 mph increasing to south
around 20 mph in the afternoon.
* Ventilation Index...Low (47-69) increasing to very high
(951-1050) in the afternoon.
.TUESDAY NIGHT...
* Sky/weather.........Mostly cloudy. Patchy smoke.
* Min temperature.....40-48.
* Max humidity........65-80 percent.
* Humidity recovery...Good.
* 20-foot winds.......
* Valleys/lwr slopes...West winds 4 to 9 mph in the evening
becoming drainage winds less than 5 mph.
* Ridges/upr slopes....West winds 2 to 7 mph.
* CWR.................0 percent.
* Chc of lightning....0 percent.
* Mixing height.......500 ft agl.
* Transport winds.....West 10 to 15 mph.
* Ventilation Index...Moderate to high (416-532) decreasing to low
(40-66) after midnight.
.WEDNESDAY...
* Sky/weather.........Mostly cloudy. Patchy smoke in the morning. A
slight chance of showers in the morning. A chance of showers in
the afternoon.
* Max temperature.....61-68.
* Min humidity........30-41 percent.
* 20-foot winds.......
* Valleys/lwr slopes...Southwest winds 2 to 7 mph increasing to 7
to 13 mph with gusts up to 25 mph in the afternoon.
* Ridges/upr slopes....Southwest winds 4 to 9 mph.
* CWR.................0 percent.
* Chc of lightning....10 percent (very low chance).
* Mixing height.......8500 ft agl.
* Transport winds.....West around 10 mph increasing to southwest
around 20 mph in the afternoon.
* Ventilation Index...Low (138-192) increasing to very high
(1049-1050) in the afternoon.
.Forecast days 3 through 7......
.THURSDAY...Showers and a slight chance of thunderstorms. Lows
39 to 47. Highs 57 to 63. Southwest winds 7 to 13 mph.
.FRIDAY...Mostly cloudy with a chance of showers. Lows 33 to 42.
Highs 59 to 65. West winds 2 to 7 mph.
.SATURDAY...Mostly cloudy with a chance of showers. Lows 34 to
43. Highs 64 to 69. North winds 1 to 6 mph.
.SUNDAY...Partly cloudy with a chance of showers. Lows 35 to 44.
Highs 66 to 71. Southeast winds 1 to 6 mph.
.LABOR DAY...Partly cloudy with a slight chance of showers. Lows
36 to 45. Highs 69 to 74. West winds 1 to 6 mph.
$$
.8-14 DAY OUTLOOK for Tuesday September 8 through Monday September 14...
A greater chance of near normal temperatures and above normal
precipitation.
$$