Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Spokane, WA
Issued by NWS Spokane, WA
801
FNUS56 KOTX 181218
FWFOTX
Fire Weather Planning Forecast for Eastern Washington and North Idaho
National Weather Service Spokane WA
518 AM PDT Tue Aug 18 2026
...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 10 PM PDT THIS
EVENING FOR FIRE ZONES 709...
.DISCUSSION...
Central WA:
- Elevated fire weather conditions Tuesday with increasing
Cascade gap winds.
Eastern WA:
- Breezy winds across the Columbia Basin Tuesday afternoon.
- Elevated to critical fire weather conditions for southeastern
Washington due to breezy winds and low RH.
North ID:
- 5-10% chance for isolated mountain showers and thunderstorms
Tuesday afternoon and early evening.
- Breezy southwest winds Tuesday afternoon.
Conditions will primarily be warm and dry over the next few days.
Expect afternoon terrain-driven cloud development Tuesday
afternoon with a 5-10% chance for thunderstorms in North ID. Winds
will increase from the west/southwest Tuesday with breezy
conditions region-wide. Locally stronger winds will impact the
Cascade gaps and the Snake River/Lower Palouse area. Additional
fire weather concerns are forecast by Friday and Saturday with
potential for gusty winds, low RH, and thunderstorms.
***************************************************************
Forecasts for 20 foot wind speeds (valleys and ridge tops) are
10 minute averages reflecting RAWS wind.
***Ventilation Index is derived from transport wind
multiplied by the mixing height divided by 100.
Categories: low (< 200), moderate (200-500),
high (500-800), and very high (> 800).
***************************************************************
WAZ696-698-190130-
East Washington Central Cascades (Zone 696)-
East Washington North Cascades (Zone 698)-
Including the cities of Stevens Pass, Lake Wenatchee Area,
and Leavenworth
518 AM PDT Tue Aug 18 2026
.Today...
* Sky/Weather.........Mostly sunny. Patchy smoke.
* Chance of Lightning...0 percent.
* Max Temperature.....80-90 valleys and 69-79 mountains.
* 24 hr Trend........2 degrees cooler valleys, and 7 degrees cooler
mountains.
* Min Humidity........25-35 percent valleys and 29-45 percent
mountains.
* 24 hr Trend........1 percent wetter valleys, and 15 percent
wetter mountains.
* 20-foot winds.......
* Valleys/Lwr Slopes...Northwest 3 to 11 mph with gusts to around
25 mph.
* Ridges/Upr Slopes....Northwest 3 to 11 mph.
* Mixing Height.......7000 ft AGL.
* Transport Winds.....Northwest 5 to 15 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Moderate (311) in the morning increasing to
high (625) in the afternoon.
.TONIGHT...
* Sky/Weather.........Partly cloudy then becoming mostly cloudy.
* Chance of Lightning...0 percent.
* Min Temperature.....56-66 valleys and 50-60 mountains.
* 24 hr Trend........2 degrees warmer.
* Max Humidity........50-65 percent valleys and 60-75 percent
mountains.
* 24 hr Trend........5 percent drier valleys, and 15 percent drier
mountains.
* Humidity Recovery...Fair.
* 20-foot winds.......
* Valleys/Lwr Slopes...Northwest 3 to 11 mph with gusts to around
25 mph.
* Ridges/Upr Slopes....Northwest 3 to 12 mph.
* Mixing Height.......4000 ft AGL falling to near surface.
* Transport Winds.....Northwest 5 to 15 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...High (546) in the evening decreasing to low
(67) overnight.
.WEDNESDAY...
* Sky/Weather.........Mostly sunny.
* Chance of Lightning...0 percent.
* Max Temperature.....81-91 valleys and 69-79 mountains.
* Min Humidity........30-45 percent.
* 20-foot winds.......
* Valleys/Lwr Slopes...Northwest 3 to 8 mph with gusts to around 20
mph in the morning shifting to the southwest 3 to 6 mph in
the afternoon.
* Ridges/Upr Slopes....West 3 to 9 mph in the morning shifting to
the southwest 3 to 7 mph in the afternoon.
* Mixing Height.......7000 ft AGL.
* Transport Winds.....West 5 to 10 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Moderate (226) in the morning increasing to
high (606) in the afternoon.
.Forecast Days 3 Through 7......
.THURSDAY...Mostly clear. Lows 56 to 66 valleys...51 to
61 mountains. Highs 85 to 95 valleys...73 to 83 mountains. West
wind up to 5 mph.
.FRIDAY...Mostly cloudy. A chance of rain showers. Lows 61 to
70 valleys...55 to 65 mountains. Highs 83 to 93 valleys...71 to
81 mountains. West wind up to 5 mph.
.SATURDAY...Cooler. Mostly cloudy. A chance of showers and
thunderstorms. Lows 56 to 66 valleys...50 to 60 mountains. Highs
72 to 82 valleys...62 to 72 mountains. West wind 5 to 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy. Lows 52 to 62 valleys...
45 to 55 mountains. Highs 77 to 87 valleys...64 to 74 mountains.
.8 to 14 Day Outlook for Aug 25 - 31 2026
Above normal temperatures and near normal precipitation.
$$
WAZ697-190130-
East Portion of North Cascades National Park/Lake Chelan National
Recreation Area (Zone 697)-
Including the city of Stehekin
518 AM PDT Tue Aug 18 2026
.Today...
* Sky/Weather.........Partly sunny then becoming sunny.
* Chance of Lightning...0 percent.
* Max Temperature.....79-89 valleys and 67-77 mountains.
* 24 hr Trend........1 degree warmer.
* Min Humidity........30-45 percent.
* 24 hr Trend........Unchanged.
* 20-foot winds.......
* Valleys/Lwr Slopes...West 3 to 11 mph. Gusts up to 20 mph in the
afternoon.
* Ridges/Upr Slopes....West 3 to 11 mph.
* Mixing Height.......4500 ft AGL.
* Transport Winds.....Northwest 5 to 10 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Moderate (263) in the morning increasing to
moderate (468) in the afternoon.
.TONIGHT...
* Sky/Weather.........Partly cloudy then becoming mostly cloudy.
* Chance of Lightning...0 percent.
* Min Temperature.....57-66 valleys and 48-58 mountains.
* 24 hr Trend........2 degrees cooler.
* Max Humidity........55-70 percent valleys and 61-80 percent
mountains.
* 24 hr Trend........Unchanged.
* Humidity Recovery...Good.
* 20-foot winds.......
* Valleys/Lwr Slopes...Northwest 3 to 10 mph. Gusts up to 20 mph in
the evening.
* Ridges/Upr Slopes....Northwest 3 to 10 mph.
* Mixing Height.......3000 ft AGL falling to near surface.
* Transport Winds.....Northwest 5 to 15 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Moderate (367) in the evening decreasing to
low (41) overnight.
.WEDNESDAY...
* Sky/Weather.........Mostly sunny.
* Chance of Lightning...0 percent.
* Max Temperature.....81-91 valleys and 69-79 mountains.
* Min Humidity........30-45 percent.
* 20-foot winds.......
* Valleys/Lwr Slopes...West 3 to 8 mph.
* Ridges/Upr Slopes....West 3 to 9 mph.
* Mixing Height.......6500 ft AGL.
* Transport Winds.....West 5 to 10 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Low (138) in the morning increasing to high
(505) in the afternoon.
.Forecast Days 3 Through 7......
.THURSDAY...Mostly clear. Lows 58 to 67 valleys...50 to
60 mountains. Highs 86 to 96 valleys...73 to 83 mountains. West
wind up to 5 mph.
.FRIDAY...Partly cloudy. A chance of rain showers. Lows 62 to
71 valleys...54 to 64 mountains. Highs 83 to 93 valleys...71 to
81 mountains. Southwest wind up to 5 mph.
.SATURDAY...Cooler. Mostly cloudy. A chance of showers and
thunderstorms. Lows 59 to 68 valleys...50 to 60 mountains. Highs
71 to 81 valleys...59 to 69 mountains. West wind 5 to 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy. Lows 53 to 63 valleys...
45 to 55 mountains. Highs 76 to 86 valleys...63 to 73 mountains.
.8 to 14 Day Outlook for Aug 25 - 31 2026
Above normal temperatures and near normal precipitation.
$$
WAZ704-190130-
Methow Valley (Zone 704)-
Including the cities of Mazama, Winthrop, and Twisp
518 AM PDT Tue Aug 18 2026
.Today...
* Sky/Weather.........Partly sunny then becoming sunny. Patchy
smoke through the day.
* Chance of Lightning...0 percent.
* Max Temperature.....85-94.
* 24 hr Trend........4 degrees cooler.
* Min Humidity........18-22 percent.
* 24 hr Trend........2 percent drier.
* 20-foot winds.......Northwest 3 to 8 mph.
* Mixing Height.......8500 ft AGL.
* Transport Winds.....Northwest 5 to 10 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Moderate (346) in the morning increasing to
high (733) in the afternoon.
.TONIGHT...
* Sky/Weather.........Partly cloudy then becoming mostly cloudy.
* Chance of Lightning...0 percent.
* Min Temperature.....56-66.
* 24 hr Trend........Unchanged.
* Max Humidity........55-70 percent.
* 24 hr Trend........5 percent wetter.
* Humidity Recovery...Fair.
* 20-foot winds.......Northwest 3 to 9 mph. Gusts up to 20 mph in
the evening.
* Mixing Height.......6000 ft AGL falling to near surface.
* Transport Winds.....Northwest 10 to 15 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...High (642) in the evening decreasing to low
(63) overnight.
.WEDNESDAY...
* Sky/Weather.........Mostly sunny.
* Chance of Lightning...0 percent.
* Max Temperature.....84-93.
* Min Humidity........21-27 percent.
* 20-foot winds.......Northwest 3 to 6 mph in the morning shifting
to the southeast in the afternoon.
* Mixing Height.......8000 ft AGL.
* Transport Winds.....Southwest 5 to 10 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Low (188) in the morning increasing to high
(738) in the afternoon.
.Forecast Days 3 Through 7......
.THURSDAY...Mostly clear. Lows 58 to 66. Highs 86 to 96.
Southeast wind up to 5 mph.
.FRIDAY...Mostly cloudy. A chance of rain showers. Lows 61 to 69.
Highs 86 to 95. Northwest wind up to 5 mph.
.SATURDAY...Mostly cloudy. A chance of showers and thunderstorms.
Lows 58 to 67. Highs 78 to 87. West wind up to 10 mph.
.SUNDAY...Partly cloudy. Lows 51 to 60. Highs 78 to 87.
.MONDAY...Mostly clear. Lows 52 to 62. Highs 80 to 89.
.8 to 14 Day Outlook for Aug 25 - 31 2026
Above normal temperatures and near normal precipitation.
$$
WAZ703-190130-
Okanogan Valley (Zone 703)-
Including the cities of Conconully and Omak
518 AM PDT Tue Aug 18 2026
.Today...
* Sky/Weather.........Partly sunny then becoming sunny. Areas of
smoke.
* Chance of Lightning...0 percent.
* Max Temperature.....86-94.
* 24 hr Trend........1 degree cooler.
* Min Humidity........17-23 percent.
* 24 hr Trend........2 percent wetter.
* 20-foot winds.......Northwest 3 to 6 mph.
* Mixing Height.......9000 ft AGL.
* Transport Winds.....Northwest 5 to 10 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Moderate (330) in the morning increasing to
high (659) in the afternoon.
.TONIGHT...
* Sky/Weather.........Partly cloudy then becoming mostly cloudy.
* Chance of Lightning...0 percent.
* Min Temperature.....61-66.
* 24 hr Trend........1 degree cooler.
* Max Humidity........45-55 percent.
* 24 hr Trend........5 percent wetter.
* Humidity Recovery...Poor.
* 20-foot winds.......Northwest 3 to 8 mph.
* Mixing Height.......8000 ft AGL falling to near surface.
* Transport Winds.....Northwest 5 to 10 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...High (634) in the evening decreasing to low
(46) overnight.
.WEDNESDAY...
* Sky/Weather.........Mostly sunny.
* Chance of Lightning...0 percent.
* Max Temperature.....84-93.
* Min Humidity........20-27 percent.
* 20-foot winds.......Northwest 3 to 5 mph in the morning shifting
to the south 3 to 9 mph in the afternoon.
* Mixing Height.......7000 ft AGL.
* Transport Winds.....Southwest 5 to 10 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Low (168) in the morning increasing to high
(650) in the afternoon.
.Forecast Days 3 Through 7......
.THURSDAY...Partly cloudy. Lows 61 to 67. Highs 87 to 95. South
wind up to 10 mph.
.FRIDAY...Mostly cloudy. Lows 63 to 70. Highs 87 to 95. Northwest
wind up to 10 mph.
.SATURDAY...Mostly cloudy. A chance of showers and thunderstorms.
Lows 62 to 67. Highs 80 to 88. West wind up to 10 mph.
.SUNDAY...Partly cloudy. Lows 55 to 60. Highs 78 to 87.
.MONDAY...Mostly clear. Lows 56 to 62. Highs 81 to 89.
.8 to 14 Day Outlook for Aug 25 - 31 2026
Above normal temperatures and near normal precipitation.
$$
WAZ702-190130-
Colville Reservation (Zone 702)-
Including the cities of Nespelem and Keller
518 AM PDT Tue Aug 18 2026
.Today...
* Sky/Weather.........Partly sunny. Patchy smoke.
* Chance of Lightning...0 percent.
* Max Temperature.....84-94 valleys and 77-87 mountains.
* 24 hr Trend........2 degrees cooler.
* Min Humidity........17-23 percent.
* 24 hr Trend........3 percent wetter.
* 20-foot winds.......
* Valleys/Lwr Slopes...Southwest up to 7 mph.
* Ridges/Upr Slopes....Southwest up to 7 mph.
* Mixing Height.......9000 ft AGL.
* Transport Winds.....West 5 to 10 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Moderate (339) in the morning increasing to
very high (959) in the afternoon.
.TONIGHT...
* Sky/Weather.........Partly cloudy then becoming mostly cloudy.
* Chance of Lightning...0 percent.
* Min Temperature.....59-63.
* 24 hr Trend........2 degrees cooler.
* Max Humidity........40-55 percent.
* 24 hr Trend........5 percent wetter valleys, and 5 percent drier
mountains.
* Humidity Recovery...Poor.
* 20-foot winds.......
* Valleys/Lwr Slopes...West 3 to 6 mph in the evening shifting to
the north up to 4 mph overnight.
* Ridges/Upr Slopes....Northwest 3 to 6 mph in the evening shifting
to the north 3 to 5 mph overnight.
* Mixing Height.......8000 ft AGL falling to near surface.
* Transport Winds.....Northwest 5 to 10 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...High (791) in the evening decreasing to low
(39) overnight.
.WEDNESDAY...
* Sky/Weather.........Mostly sunny.
* Chance of Lightning...0 percent.
* Max Temperature.....82-92 valleys and 75-85 mountains.
* Min Humidity........20-27 percent.
* 20-foot winds.......
* Valleys/Lwr Slopes...South up to 7 mph.
* Ridges/Upr Slopes....South up to 7 mph.
* Mixing Height.......6500 ft AGL.
* Transport Winds.....South 5 to 10 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Moderate (220) in the morning increasing to
moderate (498) in the afternoon.
.Forecast Days 3 Through 7......
.THURSDAY...Partly cloudy. Lows 59 to 64. Highs 85 to
95 valleys...79 to 89 mountains. Southeast wind up to 5 mph.
.FRIDAY...Mostly cloudy. Lows 61 to 66. Highs 86 to 96 valleys...
79 to 89 mountains. Northeast wind up to 10 mph.
.SATURDAY...Mostly cloudy. A chance of showers and thunderstorms.
Lows 60 to 66. Highs 78 to 88 valleys...71 to 80 mountains.
Southwest wind up to 10 mph.
.SUNDAY...Partly cloudy. A chance of rain showers. Lows 52 to 59.
Highs 76 to 86 valleys...69 to 79 mountains.
.MONDAY...Mostly clear. Lows 53 to 60. Highs 79 to 89 valleys...
72 to 82 mountains.
.8 to 14 Day Outlook for Aug 25 - 31 2026
Above normal temperatures and near normal precipitation.
$$
WAZ699-190130-
Okanogan Highlands and Kettle Mountains (Zone 699)-
Including the cities of Republic and Curlew
518 AM PDT Tue Aug 18 2026
.Today...
* Sky/Weather.........Partly sunny. Patchy smoke.
* Chance of Lightning...0 percent.
* Max Temperature.....84-94 valleys and 76-86 mountains.
* 24 hr Trend........1 degree cooler.
* Min Humidity........19-27 percent.
* 24 hr Trend........2 percent wetter.
* 20-foot winds.......
* Valleys/Lwr Slopes...North up to 6 mph in the morning shifting to
the west 3 to 5 mph in the afternoon.
* Ridges/Upr Slopes....West up to 5 mph.
* Mixing Height.......9500 ft AGL.
* Transport Winds.....West 5 to 10 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Moderate (348) in the morning increasing to
very high (867) in the afternoon.
.TONIGHT...
* Sky/Weather.........Partly cloudy then becoming mostly cloudy.
* Chance of Lightning...0 percent.
* Min Temperature.....55-64.
* 24 hr Trend........Unchanged.
* Max Humidity........50-65 percent valleys and 40-55 percent
mountains.
* 24 hr Trend........5 percent wetter valleys, and unchanged
mountains.
* Humidity Recovery...Poor.
* 20-foot winds.......
* Valleys/Lwr Slopes...North up to 4 mph.
* Ridges/Upr Slopes....North up to 4 mph.
* Mixing Height.......8000 ft AGL falling to near surface.
* Transport Winds.....Northwest 5 to 10 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...High (648) in the evening decreasing to low
(39) overnight.
.WEDNESDAY...
* Sky/Weather.........Mostly sunny.
* Chance of Lightning...0 percent.
* Max Temperature.....83-93 valleys and 75-85 mountains.
* Min Humidity........21-29 percent.
* 20-foot winds.......
* Valleys/Lwr Slopes...Light winds in the morning becoming south 3
to 6 mph in the afternoon.
* Ridges/Upr Slopes....Light winds in the morning becoming south 3
to 6 mph in the afternoon.
* Mixing Height.......8000 ft AGL.
* Transport Winds.....Southwest 5 to 10 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Moderate (242) in the morning increasing to
high (696) in the afternoon.
.Forecast Days 3 Through 7......
.THURSDAY...Partly cloudy. Lows 54 to 63. Highs 86 to
96 valleys...78 to 88 mountains. South wind up to 5 mph.
.FRIDAY...Mostly cloudy. Lows 56 to 65. Highs 87 to 97 valleys...
79 to 89 mountains. East wind up to 5 mph.
.SATURDAY...Not as warm. Mostly cloudy with a chance of showers
and thunderstorms. Lows 56 to 64. Highs 77 to 86 valleys...70 to
80 mountains. Southwest wind up to 10 mph.
.SUNDAY...Partly cloudy. A chance of rain showers. Lows 49 to 57.
Highs 76 to 86 valleys...68 to 78 mountains.
.MONDAY...Partly cloudy. Lows 49 to 58. Highs 79 to 89 valleys...
71 to 81 mountains.
.8 to 14 Day Outlook for Aug 25 - 31 2026
Above normal temperatures and near normal precipitation.
$$
WAZ700-701-190130-
Selkirk Mountains of Northeast Washington (Zone 700)-
Foothills of Northeast Washington (Zone 701)-
Including the cities of Metaline Falls, Ione, Colville,
Deer Park, and Newport
518 AM PDT Tue Aug 18 2026
.Today...
* Sky/Weather.........Partly sunny. Patchy smoke.
* Chance of Lightning...0 percent.
* Max Temperature.....84-92 valleys and 74-84 mountains.
* 24 hr Trend........1 degree cooler.
* Min Humidity........18-25 percent valleys and 25-35 percent
mountains.
* 24 hr Trend........4 percent wetter.
* 20-foot winds.......
* Valleys/Lwr Slopes...Southwest up to 7 mph. Gusts up to 20 mph in
the afternoon.
* Ridges/Upr Slopes....Southwest up to 7 mph.
* Mixing Height.......9500 ft AGL.
* Transport Winds.....Southwest 5 to 15 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Moderate (368) in the morning increasing to
very high (1125) in the afternoon.
.TONIGHT...
* Sky/Weather.........Partly cloudy.
* Chance of Lightning...0 percent.
* Min Temperature.....53-63.
* 24 hr Trend........2 degrees cooler.
* Max Humidity........50-65 percent.
* 24 hr Trend........5 percent drier valleys, and 10 percent drier
mountains.
* Humidity Recovery...Fair.
* 20-foot winds.......
* Valleys/Lwr Slopes...Southwest up to 6 mph in the evening
shifting to the southeast up to 3 mph overnight.
* Ridges/Upr Slopes....West 3 to 6 mph in the evening shifting to
the north 3 to 5 mph overnight.
* Mixing Height.......7500 ft AGL falling to near surface.
* Transport Winds.....Southwest 5 to 15 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Very high (891) in the evening decreasing to
low (34) overnight.
.WEDNESDAY...
* Sky/Weather.........Mostly sunny.
* Chance of Lightning...0 percent.
* Max Temperature.....83-90 valleys and 73-83 mountains.
* Min Humidity........20-26 percent valleys and 25-35 percent
mountains.
* 20-foot winds.......
* Valleys/Lwr Slopes...South up to 6 mph.
* Ridges/Upr Slopes....South up to 6 mph.
* Mixing Height.......7000 ft AGL.
* Transport Winds.....South 5 to 10 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Moderate (284) in the morning increasing to
high (622) in the afternoon.
.Forecast Days 3 Through 7......
.THURSDAY...Partly cloudy. Lows 52 to 62. Highs 87 to
95 valleys...77 to 87 mountains. Southeast wind up to 5 mph.
.FRIDAY...Mostly cloudy. Lows 55 to 65. Highs 87 to 96 valleys...
78 to 88 mountains. Northeast wind up to 5 mph.
.SATURDAY...Not as warm. Mostly cloudy. A chance of showers and
thunderstorms. Lows 55 to 64. Highs 78 to 85 valleys...68 to
77 mountains. South wind up to 10 mph.
.SUNDAY...Partly cloudy. A chance of rain showers. Lows 48 to 58.
Highs 77 to 84 valleys...66 to 76 mountains.
.MONDAY...Mostly clear. Lows 48 to 58. Highs 80 to 87 valleys...
70 to 79 mountains.
.8 to 14 Day Outlook for Aug 25 - 31 2026
Above normal temperatures and near normal precipitation.
$$
IDZ101-190130-
Northern and Central Idaho Panhandle (Zone 101)-
Including the cities of St. Maries, Rathdrum Prairie,
Silver Valley, Bonners Ferry, and Priest Lake
518 AM PDT Tue Aug 18 2026
.Today...
* Sky/Weather.........Partly sunny. Patchy smoke.
* Chance of Lightning...0 percent.
* Max Temperature.....83-90 valleys and 73-83 mountains.
* 24 hr Trend........3 degrees cooler.
* Min Humidity........20-30 percent valleys and 25-40 percent
mountains.
* 24 hr Trend........10 percent wetter.
* 20-foot winds.......
* Valleys/Lwr Slopes...Southwest up to 8 mph. Gusts up to 20 mph in
the afternoon.
* Ridges/Upr Slopes....Southwest up to 9 mph. Gusts up to 20 mph in
the afternoon.
* Mixing Height.......8000 ft AGL.
* Transport Winds.....Southwest 5 to 15 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...High (720) in the morning increasing to very
high (1230) in the afternoon.
.TONIGHT...
* Sky/Weather.........Partly cloudy.
* Chance of Lightning...0 percent.
* Min Temperature.....53-62.
* 24 hr Trend........2 degrees cooler.
* Max Humidity........50-65 percent valleys and 40-55 percent
mountains.
* 24 hr Trend........15 percent drier valleys, and 5 percent drier
mountains.
* Humidity Recovery...Poor.
* 20-foot winds.......
* Valleys/Lwr Slopes...South up to 7 mph.
* Ridges/Upr Slopes....South up to 7 mph.
* Mixing Height.......6500 ft AGL falling to near surface.
* Transport Winds.....Southwest 5 to 15 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Very high (885) in the evening decreasing to
low (44) overnight.
.WEDNESDAY...
* Sky/Weather.........Mostly sunny.
* Chance of Lightning...0 percent.
* Max Temperature.....82-90 valleys and 73-83 mountains.
* Min Humidity........22-30 percent.
* 20-foot winds.......
* Valleys/Lwr Slopes...Southwest up to 7 mph.
* Ridges/Upr Slopes....Southwest up to 7 mph.
* Mixing Height.......7500 ft AGL.
* Transport Winds.....Southwest 5 to 10 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Moderate (404) in the morning increasing to
very high (856) in the afternoon.
.Forecast Days 3 Through 7......
.THURSDAY...Mostly clear. Lows 53 to 61. Highs 87 to 94 valleys...
78 to 88 mountains. South wind up to 5 mph.
.FRIDAY...Partly cloudy. A chance of rain showers. Lows 56 to 65.
Highs 88 to 96 valleys...79 to 89 mountains. Northeast wind up to
5 mph.
.SATURDAY...Not as warm. Mostly cloudy. A chance of showers and
thunderstorms. Lows 56 to 63. Highs 78 to 84 valleys...69 to
79 mountains. Southwest wind up to 10 mph.
.SUNDAY...Mostly clear. A chance of rain showers. Lows 49 to 58.
Highs 76 to 83 valleys...67 to 77 mountains.
.MONDAY...Mostly clear. Lows 49 to 58. Highs 80 to 87 valleys...
72 to 82 mountains.
.8 to 14 Day Outlook for Aug 25 - 31 2026
Above normal temperatures and near normal precipitation.
$$
WAZ707-190130-
Western Columbia Basin (Zone 707)-
Including the cities of Moses Lake and Ephrata
518 AM PDT Tue Aug 18 2026
.Today...
* Sky/Weather.........Mostly sunny. Patchy smoke.
* Chance of Lightning...0 percent.
* Max Temperature.....90-96.
* 24 hr Trend........1 degree cooler.
* Min Humidity........17-24 percent.
* 24 hr Trend........2 percent drier.
* 20-foot winds.......Southwest 3 to 10 mph.
* Mixing Height.......8000 ft AGL.
* Transport Winds.....West 5 to 15 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Moderate (342) in the morning increasing to
very high (938) in the afternoon.
.TONIGHT...
* Sky/Weather.........Mostly clear.
* Chance of Lightning...0 percent.
* Min Temperature.....56-64.
* 24 hr Trend........2 degrees cooler.
* Max Humidity........60-75 percent.
* 24 hr Trend........10 percent wetter.
* Humidity Recovery...Fair.
* 20-foot winds.......West 3 to 12 mph with gusts to around 25 mph.
* Mixing Height.......7500 ft AGL falling to near surface.
* Transport Winds.....West 5 to 15 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Very high (856) in the evening decreasing to
low (59) overnight.
.WEDNESDAY...
* Sky/Weather.........Mostly sunny.
* Chance of Lightning...0 percent.
* Max Temperature.....88-93.
* Min Humidity........20-27 percent.
* 20-foot winds.......South 3 to 7 mph.
* Mixing Height.......6500 ft AGL.
* Transport Winds.....Southwest 5 to 10 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Moderate (259) in the morning increasing to
high (501) in the afternoon.
.Forecast Days 3 Through 7......
.THURSDAY...Mostly clear. Lows 56 to 65. Highs 91 to 96. South
wind up to 5 mph.
.FRIDAY...Mostly cloudy. Lows 59 to 68. Highs 91 to 96. North
wind up to 10 mph.
.SATURDAY...Partly cloudy. A chance of rain showers. Lows 59 to
67. Highs 84 to 89. Southwest wind 5 to 15 mph.
.SUNDAY THROUGH MONDAY...Mostly clear. Lows 52 to 62. Highs 82 to
90.
.8 to 14 Day Outlook for Aug 25 - 31 2026
Above normal temperatures and near normal precipitation.
$$
WAZ708-190130-
Eastern Columbia Basin - Palouse - Spokane Area (Zone 708)-
Including the cities of Spokane, Pullman, Ritzville, Wilbur,
and Cheney
518 AM PDT Tue Aug 18 2026
.Today...
* Sky/Weather.........Mostly sunny. Patchy smoke.
* Chance of Lightning...0 percent.
* Max Temperature.....88-95.
* 24 hr Trend........Unchanged.
* Min Humidity........16-20 percent.
* 24 hr Trend........1 percent drier.
* 20-foot winds.......Southwest 3 to 9 mph with gusts to around 20
mph.
* Mixing Height.......8000 ft AGL.
* Transport Winds.....Southwest 5 to 15 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Moderate (427) in the morning increasing to
very high (1096) in the afternoon.
.TONIGHT...
* Sky/Weather.........Partly cloudy.
* Chance of Lightning...0 percent.
* Min Temperature.....55-62.
* 24 hr Trend........3 degrees cooler.
* Max Humidity........45-60 percent.
* 24 hr Trend........5 percent wetter.
* Humidity Recovery...Poor.
* 20-foot winds.......Southwest 3 to 8 mph.
* Mixing Height.......7500 ft AGL falling to near surface.
* Transport Winds.....Southwest 5 to 15 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Very high (957) in the evening decreasing to
low (55) overnight.
.WEDNESDAY...
* Sky/Weather.........Mostly sunny.
* Chance of Lightning...0 percent.
* Max Temperature.....87-93.
* Min Humidity........16-22 percent.
* 20-foot winds.......South 3 to 7 mph.
* Mixing Height.......5500 ft AGL.
* Transport Winds.....Southwest 5 to 15 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Moderate (389) in the morning increasing to
high (639) in the afternoon.
.Forecast Days 3 Through 7......
.THURSDAY...Mostly clear. Lows 53 to 61. Highs 91 to 98.
Southeast wind up to 5 mph.
.FRIDAY...Mostly cloudy. A chance of rain showers. Lows 57 to 64.
Highs 92 to 97. Northeast wind up to 10 mph.
.SATURDAY...Partly cloudy. A chance of rain showers. Lows 56 to
64. Highs 82 to 89. Southwest wind 5 to 15 mph.
.SUNDAY...Mostly clear. A chance of rain showers. Lows 50 to 58.
Highs 81 to 88.
.MONDAY...Mostly clear. Lows 50 to 58. Highs 85 to 92.
.8 to 14 Day Outlook for Aug 25 - 31 2026
Above normal temperatures and near normal precipitation.
$$
WAZ709-190130-
Lower Palouse - Snake River (Zone 709)-
Including the city of Pomeroy
518 AM PDT Tue Aug 18 2026
...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 10 PM PDT THIS
EVENING...
.Today...
* Sky/Weather.........Mostly sunny.
* Chance of Lightning...0 percent.
* Max Temperature.....87-97.
* 24 hr Trend........1 degree warmer.
* Min Humidity........12-19 percent.
* 24 hr Trend........3 percent drier.
* 20-foot winds.......Southwest 3 to 14 mph with gusts to around 30
mph.
* Mixing Height.......7000 ft AGL.
* Transport Winds.....Southwest 10 to 20 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...High (525) in the morning increasing to very
high (1178) in the afternoon.
.TONIGHT...
* Sky/Weather.........Mostly clear.
* Chance of Lightning...0 percent.
* Min Temperature.....59-63.
* 24 hr Trend........3 degrees cooler.
* Max Humidity........35-45 percent.
* 24 hr Trend........5 percent wetter.
* Humidity Recovery...Poor.
* 20-foot winds.......Southwest 3 to 13 mph with gusts to around 25
mph.
* Mixing Height.......6000 ft AGL falling to near surface.
* Transport Winds.....Southwest 10 to 20 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Very high (892) in the evening decreasing to
low (76) overnight.
.WEDNESDAY...
* Sky/Weather.........Mostly sunny.
* Chance of Lightning...0 percent.
* Max Temperature.....86-96.
* Min Humidity........14-20 percent.
* 20-foot winds.......South 3 to 9 mph with gusts to around 20 mph
in the morning shifting to the west 3 to 7 mph in the afternoon.
* Mixing Height.......6000 ft AGL.
* Transport Winds.....Southwest 5 to 15 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Moderate (461) in the morning increasing to
high (679) in the afternoon.
.Forecast Days 3 Through 7......
.THURSDAY...Mostly clear. Lows 58 to 64. Highs 90 to 100.
Northwest wind up to 10 mph.
.FRIDAY...Mostly cloudy. A chance of showers. Lows 62 to 69.
Highs 90 to 100. South wind up to 10 mph.
.SATURDAY...Partly cloudy. A chance of rain showers. Lows 61 to
67. Highs 81 to 91. Southwest wind 5 to 15 mph.
.SUNDAY THROUGH MONDAY...Mostly clear. Lows 55 to 60. Highs 82 to
92.
.8 to 14 Day Outlook for Aug 25 - 31 2026
Above normal temperatures and near normal precipitation.
$$
WAZ705-706-190130-
Foothills of Central Washington Cascades (Zone 705)-
Waterville Plateau (Zone 706)-
Including the cities of Chelan, Wenatchee, Waterville,
and Grand Coulee
518 AM PDT Tue Aug 18 2026
.Today...
* Sky/Weather.........Mostly sunny. Patchy smoke through the day.
* Chance of Lightning...0 percent.
* Max Temperature.....86-94.
* 24 hr Trend........2 degrees cooler.
* Min Humidity........17-24 percent.
* 24 hr Trend........Unchanged.
* 20-foot winds.......West 3 to 12 mph.
* Mixing Height.......8500 ft AGL.
* Transport Winds.....West 5 to 15 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Moderate (317) in the morning increasing to
very high (863) in the afternoon.
.TONIGHT...
* Sky/Weather.........Partly cloudy.
* Chance of Lightning...0 percent.
* Min Temperature.....58-66.
* 24 hr Trend........2 degrees cooler.
* Max Humidity........50-65 percent.
* 24 hr Trend........Unchanged.
* Humidity Recovery...Fair.
* 20-foot winds.......West 3 to 13 mph with gusts to around 25 mph.
* Mixing Height.......7500 ft AGL falling to near surface.
* Transport Winds.....Northwest 5 to 15 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...High (743) in the evening decreasing to low
(64) overnight.
.WEDNESDAY...
* Sky/Weather.........Mostly sunny.
* Chance of Lightning...0 percent.
* Max Temperature.....85-94.
* Min Humidity........21-27 percent.
* 20-foot winds.......West 3 to 7 mph in the morning shifting to
the south 3 to 6 mph in the afternoon.
* Mixing Height.......7000 ft AGL.
* Transport Winds.....West 5 to 10 mph.
* CWR (> 0.10 IN).....0 percent.
* Ventilation Index...Low (182) in the morning increasing to high
(510) in the afternoon.
.Forecast Days 3 Through 7......
.THURSDAY...Partly cloudy. Lows 59 to 67. Highs 87 to 96. South
wind up to 5 mph.
.FRIDAY...Mostly cloudy. Lows 63 to 70. Highs 87 to 96. Northwest
wind up to 10 mph.
.SATURDAY...Partly cloudy. A chance of rain showers. Lows 61 to
67. Highs 78 to 87. West wind 5 to 15 mph.
.SUNDAY THROUGH MONDAY...Mostly clear. Lows 54 to 64. Highs 79 to
89.
.8 to 14 Day Outlook for Aug 25 - 31 2026
Above normal temperatures and near normal precipitation.
$$