Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Grand Junction, CO
Issued by NWS Grand Junction, CO
612
FNUS55 KGJT 171922
FWFGJT
Fire Weather Planning Forecast for Wrn Colorado and Ern Utah
National Weather Service Grand Junction CO
122 PM MDT Thu Sep 17 2026
.DISCUSSION...Critical fire weather conditions are not expected as
sub-tropical moisture continues to propagate through the area
which is feeding shower and thunderstorm activity through the end
of the week. These storms bring a threat of heavy rainfall and
potential for excess runoff, especially over burn scars. Showers
and storms will be widespread in coverage through Friday, becoming
more scattered and terrain based this weekend.
...GUSTY ERRATIC WINDS CAN BE EXPECTED NEAR ANY SHOWERS
OR THUNDERSTORMS...
...THE SMOKE DATA IS CALCULATED FROM AN AVERAGE AT 6000 FEET MSL...
COZ200-181130-
Little Snake Forecast Area-
122 PM MDT Thu Sep 17 2026
.TONIGHT...
Sky/weather.........Partly cloudy (40-50%). Near 6000 feet,
isolated showers until 2400. Isolated
thunderstorms. Scattered showers after 2400.
near 8000 feet, scattered showers and isolated
thunderstorms.
Chc of lightning....20 percent.
Min temperature.....50-60 F.
Max humidity........75-90%.
20-foot winds.......Downslope/downvalley winds 3 to 6 mph.
Localized gusts up to 20 mph in the evening.
CWR.................10 percent.
15K Ft MSL Winds....Southwest 15 to 20 mph.
Mixing Height.......3000 ft AGL until 2000, then 500 ft AGL.
Transport Winds.....South 5 to 10 mph.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Mostly cloudy (60-70%). Near 6000 feet,
isolated thunderstorms until 1200. Scattered
showers. Scattered thunderstorms after 1200.
near 8000 feet, scattered showers and isolated
thunderstorms until 1200, then numerous showers
and scattered thunderstorms.
Chc of lightning....50 percent.
Max temperature.....63-73 F near 6000 feet
56-66 F near 8000 feet.
Min humidity........42-52% near 6000 feet
51-61% near 8000 feet.
20-foot winds.......Upslope/upvalley winds 4 to 8 mph. Localized
gusts up to 25 mph in the afternoon.
CWR.................60 percent.
15K Ft MSL Winds....Southwest 20 to 25 mph.
Mixing Height.......5000 ft AGL.
Transport Winds.....South 5 mph until 1200, then 10 to 15 mph.
Smoke dispersal.....Poor until 1200, then fair.
.FRIDAY NIGHT...
Sky/weather.........Mostly cloudy (70-80%). Showers and scattered
thunderstorms until 2400. Numerous showers and
isolated thunderstorms after 2400.
Chc of lightning....50 percent.
Min temperature.....47-57 F.
Max humidity........77-92%.
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming
downslope/downvalley 3 to 6 mph by sunset.
CWR.................90 percent.
15K Ft MSL Winds....Southwest 20 to 30 mph increasing to 25 to 35
mph after midnight.
Mixing Height.......1000 ft AGL.
Transport Winds.....Southwest 5 to 10 mph.
Smoke dispersal.....Poor.
.SATURDAY...
Sky/weather.........Mostly cloudy (70-80%). Near 6000 feet,
isolated thunderstorms until 1200. Numerous
showers. Scattered thunderstorms after 1200.
near 8000 feet, scattered showers and isolated
thunderstorms until 1200, then numerous showers
and scattered thunderstorms.
Chc of lightning....50 percent.
Max temperature.....59-69 F near 6000 feet
51-61 F near 8000 feet.
Min humidity........40-50% near 6000 feet
49-59% near 8000 feet.
20-foot winds.......Upslope/upvalley winds 4 to 8 mph. Localized
gusts up to 25 mph in the afternoon.
CWR.................10 percent.
15K Ft MSL Winds....Southwest 20 to 30 mph.
Mixing Height.......2000 ft AGL until 1100, then 6000 ft AGL.
Transport Winds.....South 5 mph until 1200, then southwest 10 to 15
mph.
Smoke dispersal.....Poor until 0900. Good after 1200.
.FORECAST FOR DAY 3 THROUGH 7...
.SUNDAY...Partly cloudy. Scattered showers and isolated
thunderstorms near 6000 feet and scattered showers and isolated
thunderstorms near 8000 feet. Lows 39-49. Highs 62-72. Winds less
than 15 mph.
.MONDAY...Mostly clear. Lows 39-49. Highs 68-78. Winds less than
15 mph.
.TUESDAY...Partly cloudy. Scattered showers and isolated
thunderstorms near 6000 feet and scattered showers and isolated
thunderstorms near 8000 feet. Lows 42-52. Highs 67-77. Winds less
than 15 mph.
.WEDNESDAY...Partly cloudy. Isolated showers and thunderstorms.
Lows 41-51. Highs 69-79.
.THURSDAY...Partly cloudy. Lows 42-52. Highs 71-81.
$$
COZ201-181130-
Routt Forecast Area-
122 PM MDT Thu Sep 17 2026
.TONIGHT...
Sky/weather.........Partly cloudy (50-60%) until 2400, then mostly
cloudy (60-70%). Isolated showers until 2400.
Isolated thunderstorms. Scattered showers after
2400.
Chc of lightning....20 percent.
Min temperature.....44-54 F.
Max humidity........76-91%.
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming
downslope/downvalley 3 to 6 mph by sunset.
CWR.................10 percent.
15K Ft MSL Winds....Southwest 15 to 20 mph.
Mixing Height.......1000 ft AGL.
Transport Winds.....South 5 mph.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Mostly cloudy (70-80%). Scattered showers and
isolated thunderstorms until 1200, then
numerous showers and scattered thunderstorms.
Chc of lightning....50 percent.
Max temperature.....58-68 F.
Min humidity........46-56%.
20-foot winds.......Upslope/upvalley winds 4 to 8 mph. Localized
gusts up to 20 mph in the afternoon.
CWR.................60 percent.
15K Ft MSL Winds....Southwest 15 to 20 mph.
Mixing Height.......4500 ft AGL.
Transport Winds.....Southwest 5 mph.
Smoke dispersal.....Poor.
.FRIDAY NIGHT...
Sky/weather.........Partly cloudy (50-60%) until 2400, then mostly
cloudy (60-70%). Scattered showers and
thunderstorms until 2400, then numerous showers
and isolated thunderstorms.
Chc of lightning....50 percent.
Min temperature.....41-51 F.
Max humidity........76-91%.
20-foot winds.......Downslope/downvalley winds 3 to 6 mph.
Localized gusts up to 20 mph in the evening.
CWR.................30 percent.
15K Ft MSL Winds....Southwest 20 to 25 mph increasing to 20 to 30
mph after midnight.
Mixing Height.......3500 ft AGL until 1900, then 1000 ft AGL.
Transport Winds.....South 5 mph.
Smoke dispersal.....Poor.
.SATURDAY...
Sky/weather.........Mostly cloudy (70-80%). Isolated thunderstorms
until 1200. Showers. Scattered thunderstorms
after 1200.
Chc of lightning....50 percent.
Max temperature.....55-65 F.
Min humidity........44-54%.
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming
upslope/upvalley 4 to 8 mph by 1100.
CWR.................70 percent.
15K Ft MSL Winds....Southwest 20 to 30 mph.
Mixing Height.......2500 ft AGL until 1100, then 5500 ft AGL.
Transport Winds.....Southwest 5 to 10 mph.
Smoke dispersal.....Poor until 0900. Good after 1200.
.FORECAST FOR DAY 3 THROUGH 7...
.SUNDAY...Partly cloudy. Scattered showers and isolated
thunderstorms. Lows 35-45. Highs 54-64. Winds less than 15 mph.
.MONDAY...Mostly clear. Lows 33-43. Highs 61-71. Winds less than
15 mph.
.TUESDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 37-47. Highs 60-70. Winds less than 15 mph.
.WEDNESDAY...Partly cloudy. Scattered showers and isolated
thunderstorms. Lows 36-46. Highs 61-71.
.THURSDAY...Partly cloudy. Isolated showers and thunderstorms.
Lows 38-48. Highs 64-74.
$$
COZ202-181130-
White River Forecast Area-
122 PM MDT Thu Sep 17 2026
.TONIGHT...
Sky/weather.........Partly cloudy (50-60%). Isolated showers until
2400. Isolated thunderstorms. Scattered showers
after 2400.
Chc of lightning....20 percent.
Min temperature.....50-60 F.
Max humidity........77-92%.
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming
downslope/downvalley 3 to 6 mph by sunset.
CWR.................10 percent.
15K Ft MSL Winds....Southwest 15 to 20 mph.
Mixing Height.......3000 ft AGL until 2000, then 500 ft AGL.
Transport Winds.....South 5 mph.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Mostly cloudy (70-80%). Isolated thunderstorms
until 1200. Near 6000 feet, scattered showers.
near 8000 feet, numerous showers. Scattered
thunderstorms after 1200.
Chc of lightning....50 percent.
Max temperature.....66-76 F near 6000 feet
56-66 F near 8000 feet.
Min humidity........44-54%.
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming
upslope/upvalley 4 to 8 mph by 1100.
CWR.................50 percent.
15K Ft MSL Winds....Southwest 20 to 25 mph.
Mixing Height.......2500 ft AGL until 1200, then 5000 ft AGL.
Transport Winds.....South 5 mph until 1200, then 10 to 15 mph.
Smoke dispersal.....Poor until 1200, then fair.
.FRIDAY NIGHT...
Sky/weather.........Mostly cloudy (70-80%). Near 6000 feet,
scattered thunderstorms until 2400. Showers.
Isolated thunderstorms after 2400. Near 8000
feet, numerous showers and scattered
thunderstorms until 2400, then showers and
isolated thunderstorms.
Chc of lightning....50 percent.
Min temperature.....47-57 F.
Max humidity........79-94% near 6000 feet
73-88% near 8000 feet.
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming
downslope/downvalley 3 to 6 mph by sunset.
CWR.................80 percent.
15K Ft MSL Winds....Southwest 20 to 30 mph.
Mixing Height.......3500 ft AGL until 1900, then 1000 ft AGL.
Transport Winds.....West 5 to 10 mph until 2400, then southeast.
Smoke dispersal.....Poor.
.SATURDAY...
Sky/weather.........Mostly cloudy (70-80%). Numerous showers and
isolated thunderstorms until 1200. Showers and
scattered thunderstorms after 1200.
Chc of lightning....50 percent.
Max temperature.....62-72 F near 6000 feet
54-64 F near 8000 feet.
Min humidity........44-54%.
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming
upslope/upvalley 4 to 8 mph by 1100.
CWR.................60 percent.
15K Ft MSL Winds....Southwest 20 to 30 mph.
Mixing Height.......2500 ft AGL until 1100, then 5000 ft AGL.
Transport Winds.....South 5 mph until 1200, then southwest 10 to 15
mph.
Smoke dispersal.....Poor until 0900. Fair after 1200.
.FORECAST FOR DAY 3 THROUGH 7...
.SUNDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 40-50. Highs 63-73. Winds less than 15 mph.
.MONDAY...Mostly clear. Isolated showers and thunderstorms near
6000 feet. Lows 39-49. Highs 68-78. Winds less than 15 mph.
.TUESDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 43-53. Highs 67-77. Winds less than 15 mph.
.WEDNESDAY...Partly cloudy. Isolated showers and thunderstorms.
Lows 41-51. Highs 69-79.
.THURSDAY...Partly cloudy. Isolated showers and thunderstorms.
Lows 43-53. Highs 71-81.
$$
COZ203-181130-
Lower Colorado River-
122 PM MDT Thu Sep 17 2026
.TONIGHT...
Sky/weather.........Partly cloudy (50-60%) until 2400, then mostly
cloudy (70-80%). Scattered showers and isolated
thunderstorms.
Chc of lightning....20 percent.
Min temperature.....54-64 F near 6000 feet
47-57 F near 8000 feet.
Max humidity........68-83%.
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming
downslope/downvalley 3 to 6 mph by sunset.
CWR.................30 percent.
15K Ft MSL Winds....Southwest 15 to 20 mph.
Mixing Height.......1000 ft AGL.
Transport Winds.....Southeast 5 mph.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Mostly cloudy (70-80%). Numerous showers and
isolated thunderstorms until 1200, then
scattered showers and thunderstorms.
Chc of lightning....50 percent.
Max temperature.....67-77 F near 6000 feet
60-70 F near 8000 feet.
Min humidity........41-51%.
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming
upslope/upvalley 4 to 8 mph by 1100.
CWR.................60 percent.
15K Ft MSL Winds....Southwest 20 to 25 mph.
Mixing Height.......4000 ft AGL.
Transport Winds.....South 5 mph.
Smoke dispersal.....Poor.
.FRIDAY NIGHT...
Sky/weather.........Mostly cloudy (70-80%). Scattered showers and
thunderstorms until 2400, then showers and
isolated thunderstorms.
Chc of lightning....50 percent.
Min temperature.....50-60 F near 6000 feet
43-53 F near 8000 feet.
Max humidity........69-84%.
20-foot winds.......Downslope/downvalley winds 3 to 6 mph.
Localized gusts up to 20 mph in the evening.
CWR.................70 percent.
15K Ft MSL Winds....Southwest 20 to 30 mph.
Mixing Height.......1000 ft AGL.
Transport Winds.....Southeast 5 mph.
Smoke dispersal.....Poor.
.SATURDAY...
Sky/weather.........Mostly cloudy (60-70%). Isolated thunderstorms
until 1200. Numerous showers. Scattered
thunderstorms after 1200.
Chc of lightning....50 percent.
Max temperature.....65-75 F near 6000 feet
57-67 F near 8000 feet.
Min humidity........38-48%.
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming
upslope/upvalley 4 to 8 mph by 1100.
CWR.................40 percent.
15K Ft MSL Winds....Southwest 20 to 30 mph.
Mixing Height.......2000 ft AGL until 1100, then 5500 ft AGL.
Transport Winds.....Southeast 5 mph until 1200, then southwest 10
to 15 mph.
Smoke dispersal.....Poor until 0900. Fair after 1200.
.FORECAST FOR DAY 3 THROUGH 7...
.SUNDAY...Partly cloudy. Scattered showers and isolated
thunderstorms. Lows 45-55. Highs 67-77. Winds less than 15 mph.
.MONDAY...Mostly clear. Lows 44-54. Highs 71-81. Winds less than
15 mph.
.TUESDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 47-57. Highs 68-78. Winds less than 15 mph.
.WEDNESDAY...Partly cloudy. Isolated showers and thunderstorms.
Lows 45-55. Highs 69-79.
.THURSDAY...Partly cloudy. Isolated showers and thunderstorms.
Lows 46-56. Highs 72-82.
$$
COZ205-181130-
Colorado River Headwaters-
122 PM MDT Thu Sep 17 2026
.TONIGHT...
Sky/weather.........Mostly cloudy (60-70%). Scattered showers and
isolated thunderstorms.
Chc of lightning....20 percent.
Min temperature.....47-57 F.
Max humidity........75-90%.
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming
downslope/downvalley 3 to 6 mph by sunset.
CWR.................10 percent.
15K Ft MSL Winds....Southwest 15 to 20 mph.
Mixing Height.......1000 ft AGL.
Transport Winds.....Southwest 5 mph.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Mostly cloudy (70-80%). Scattered showers and
isolated thunderstorms until 1200, then
numerous showers and scattered thunderstorms.
Chc of lightning....50 percent.
Max temperature.....61-71 F.
Min humidity........43-53%.
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming
upslope/upvalley 4 to 8 mph by 1100.
CWR.................60 percent.
15K Ft MSL Winds....Southwest 15 to 20 mph.
Mixing Height.......4000 ft AGL.
Transport Winds.....Southwest 5 mph.
Smoke dispersal.....Poor.
.FRIDAY NIGHT...
Sky/weather.........Partly cloudy (50-60%). Scattered showers until
2400. Isolated thunderstorms. Showers after
2400.
Chc of lightning....20 percent.
Min temperature.....42-52 F.
Max humidity........73-88%.
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming
downslope/downvalley 3 to 6 mph by sunset.
CWR.................80 percent.
15K Ft MSL Winds....Southwest 20 to 25 mph.
Mixing Height.......1000 ft AGL.
Transport Winds.....South 5 mph.
Smoke dispersal.....Poor.
.SATURDAY...
Sky/weather.........Mostly cloudy (70-80%). Showers and isolated
thunderstorms until 1200, then numerous showers
and scattered thunderstorms.
Chc of lightning....50 percent.
Max temperature.....61-71 F.
Min humidity........38-48%.
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming
upslope/upvalley 4 to 8 mph by 1100.
CWR.................40 percent.
15K Ft MSL Winds....Southwest 20 to 25 mph.
Mixing Height.......1500 ft AGL until 1000, then 6500 ft AGL.
Transport Winds.....South 5 mph until 1200, then southwest 10 to 15
mph.
Smoke dispersal.....Poor until 0900. Good after 1200.
.FORECAST FOR DAY 3 THROUGH 7...
.SUNDAY...Partly cloudy. Scattered showers and isolated
thunderstorms. Lows 37-47. Highs 59-69. Winds less than 15 mph.
.MONDAY...Mostly clear. Isolated showers and thunderstorms. Lows
35-45. Highs 62-72. Winds less than 15 mph.
.TUESDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 38-48. Highs 60-70. Winds less than 15 mph.
.WEDNESDAY...Partly cloudy. Scattered showers and isolated
thunderstorms. Lows 37-47. Highs 61-71.
.THURSDAY...Partly cloudy. Isolated showers and thunderstorms.
Lows 38-48. Highs 64-74.
$$
COZ290-181130-
Paradox Valley Forecast Area-
122 PM MDT Thu Sep 17 2026
.TONIGHT...
Sky/weather.........Mostly cloudy (70-80%). Scattered thunderstorms
until 2400. Scattered showers. Isolated
thunderstorms after 2400.
Chc of lightning....50 percent.
Min temperature.....52-62 F near 6000 feet
46-56 F near 8000 feet.
Max humidity........68-83% near 6000 feet
82-97% near 8000 feet.
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming
downslope/downvalley 3 to 6 mph by sunset.
CWR.................20 percent.
15K Ft MSL Winds....Southwest 15 to 20 mph.
Mixing Height.......1000 ft AGL.
Transport Winds.....Southeast 5 mph.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Mostly cloudy (70-80%). Isolated thunderstorms
until 1200. Scattered showers. Scattered
thunderstorms after 1200.
Chc of lightning....50 percent.
Max temperature.....65-75 F near 6000 feet
60-70 F near 8000 feet.
Min humidity........40-50% near 6000 feet
47-57% near 8000 feet.
20-foot winds.......Upslope/upvalley winds 4 to 8 mph. Localized
gusts up to 25 mph in the afternoon.
CWR.................40 percent.
15K Ft MSL Winds....Southwest 20 to 25 mph.
Mixing Height.......5000 ft AGL.
Transport Winds.....South 5 mph until 1200, then 10 to 15 mph.
Smoke dispersal.....Poor until 0900. Fair after 1200.
.FRIDAY NIGHT...
Sky/weather.........Partly cloudy (40-50%) until 2400, then mostly
cloudy (70-80%). Scattered showers and
thunderstorms until 2400, then numerous showers
and isolated thunderstorms.
Chc of lightning....50 percent.
Min temperature.....49-59 F near 6000 feet
43-53 F near 8000 feet.
Max humidity........65-80% near 6000 feet
78-93% near 8000 feet.
20-foot winds.......Downslope/downvalley winds 3 to 6 mph.
Localized gusts up to 20 mph in the evening.
CWR.................60 percent.
15K Ft MSL Winds....Southwest 20 to 25 mph.
Mixing Height.......4000 ft AGL until 1900, then 1000 ft AGL.
Transport Winds.....South 5 mph.
Smoke dispersal.....Poor.
.SATURDAY...
Sky/weather.........Mostly cloudy (70-80%). Near 6000 feet,
numerous showers and isolated thunderstorms
until 1200, then scattered showers and
thunderstorms. Near 8000 feet, isolated
thunderstorms until 1200. Scattered showers.
Scattered thunderstorms after 1200.
Chc of lightning....50 percent.
Max temperature.....66-76 F near 6000 feet
59-69 F near 8000 feet.
Min humidity........32-42% near 6000 feet
40-50% near 8000 feet.
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming
upslope/upvalley 4 to 8 mph by 1100.
CWR.................20 percent.
15K Ft MSL Winds....Southwest 20 to 25 mph.
Mixing Height.......1000 ft AGL until 1000. 8000 ft AGL after 1100.
Transport Winds.....South 5 mph until 1200, then southwest 10 to 15
mph.
Smoke dispersal.....Poor until 0900. Good after 1200.
.FORECAST FOR DAY 3 THROUGH 7...
.SUNDAY...Mostly clear. Isolated showers and thunderstorms. Lows
46-56. Highs 69-79. Winds less than 15 mph.
.MONDAY...Mostly clear. Lows 45-55. Highs 72-82. Winds less than
15 mph.
.TUESDAY...Partly cloudy near 6000 feet and mostly cloudy near
8000 feet and numerous showers and scattered thunderstorms near
6000 feet and numerous showers and scattered thunderstorms near
8000 feet. Lows 48-58. Highs 67-77. Winds less than 15 mph.
.WEDNESDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 46-56. Highs 68-78.
.THURSDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 47-57. Highs 70-80.
$$
COZ291-181130-
Northern San Juan Forecast Area-
122 PM MDT Thu Sep 17 2026
.TONIGHT...
Sky/weather.........Mostly cloudy (70-80%). Scattered thunderstorms
until 2400. Scattered showers. Isolated
thunderstorms after 2400.
Chc of lightning....50 percent.
Min temperature.....45-55 F.
Max humidity........77-92%.
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming
downslope/downvalley 3 to 6 mph by sunset.
CWR.................20 percent.
15K Ft MSL Winds....Southwest 15 to 20 mph.
Mixing Height.......1000 ft AGL.
Transport Winds.....South 5 mph.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Mostly cloudy (70-80%). Scattered showers and
isolated thunderstorms until 1200, then
numerous showers and scattered thunderstorms.
Chc of lightning....50 percent.
Max temperature.....60-70 F.
Min humidity........45-55%.
20-foot winds.......Upslope/upvalley winds 4 to 8 mph. Localized
gusts up to 20 mph in the afternoon.
CWR.................50 percent.
15K Ft MSL Winds....Southwest 20 to 25 mph.
Mixing Height.......1000 ft AGL until 1000, then 4500 ft AGL.
Transport Winds.....Southwest 5 to 10 mph.
Smoke dispersal.....Poor until 0900. Fair after 1200.
.FRIDAY NIGHT...
Sky/weather.........Partly cloudy (30-40%) until 2400, then mostly
cloudy (60-70%). Scattered showers until 2400.
Isolated thunderstorms. Numerous showers after
2400.
Chc of lightning....20 percent.
Min temperature.....42-52 F.
Max humidity........73-88%.
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming
downslope/downvalley 3 to 6 mph by sunset.
CWR.................40 percent.
15K Ft MSL Winds....Southwest 20 to 25 mph.
Mixing Height.......1000 ft AGL.
Transport Winds.....South 5 to 10 mph.
Smoke dispersal.....Poor.
.SATURDAY...
Sky/weather.........Mostly cloudy (60-70%). Scattered showers and
isolated thunderstorms until 1200, then
numerous showers and scattered thunderstorms.
Chc of lightning....50 percent.
Max temperature.....59-69 F.
Min humidity........37-47%.
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming
upslope/upvalley 4 to 8 mph by 1100.
CWR.................10 percent.
15K Ft MSL Winds....Southwest 20 to 25 mph.
Mixing Height.......1500 ft AGL until 1000. 8000 ft AGL after 1100.
Transport Winds.....South 5 to 10 mph until 1200, then southwest 15
to 20 mph.
Smoke dispersal.....Poor until 0900. Very good after 1200.
.FORECAST FOR DAY 3 THROUGH 7...
.SUNDAY...Mostly clear. Lows 38-48. Highs 62-72. Winds less than
15 mph.
.MONDAY...Mostly clear. Lows 37-47. Highs 64-74. Winds less than
15 mph.
.TUESDAY...Mostly cloudy. Numerous showers and scattered
thunderstorms. Lows 40-50. Highs 60-70. Winds less than 15 mph.
.WEDNESDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 38-48. Highs 61-71.
.THURSDAY...Partly cloudy. Numerous showers and scattered
thunderstorms. Lows 39-49. Highs 62-72.
$$
COZ292-181130-
North Fork Forecast Area-
122 PM MDT Thu Sep 17 2026
.TONIGHT...
Sky/weather.........Mostly cloudy (70-80%). Scattered thunderstorms
until 2400. Scattered showers. Isolated
thunderstorms after 2400.
Chc of lightning....50 percent.
Min temperature.....51-61 F near 6000 feet
46-56 F near 8000 feet.
Max humidity........73-88% near 6000 feet
81-96% near 8000 feet.
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming
downslope/downvalley 3 to 6 mph by sunset.
CWR.................30 percent.
15K Ft MSL Winds....Southwest 15 to 20 mph.
Mixing Height.......1000 ft AGL.
Transport Winds.....Southeast 5 mph.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Mostly cloudy (70-80%). Scattered showers and
isolated thunderstorms until 1200. Numerous
showers and scattered thunderstorms after 1200.
Chc of lightning....50 percent.
Max temperature.....69-79 F near 6000 feet
59-69 F near 8000 feet.
Min humidity........41-51% near 6000 feet
50-60% near 8000 feet.
20-foot winds.......Upslope/upvalley winds 4 to 8 mph. Localized
gusts up to 20 mph in the afternoon.
CWR.................70 percent.
15K Ft MSL Winds....Southwest 20 to 25 mph.
Mixing Height.......3500 ft AGL.
Transport Winds.....South 5 mph.
Smoke dispersal.....Poor.
.FRIDAY NIGHT...
Sky/weather.........Partly cloudy (40-50%) until 2400, then mostly
cloudy (70-80%). Near 6000 feet, scattered
showers until 2400. Near 8000 feet, isolated
showers until 2400. Isolated thunderstorms.
Numerous showers after 2400.
Chc of lightning....20 percent.
Min temperature.....46-56 F near 6000 feet
41-51 F near 8000 feet.
Max humidity........73-88%.
20-foot winds.......Downslope/downvalley winds 3 to 6 mph.
Localized gusts up to 20 mph in the evening.
CWR.................60 percent.
15K Ft MSL Winds....Southwest 20 to 25 mph.
Mixing Height.......1000 ft AGL.
Transport Winds.....Southeast 5 mph.
Smoke dispersal.....Poor.
.SATURDAY...
Sky/weather.........Mostly cloudy (70-80%). Near 6000 feet,
numerous showers and isolated thunderstorms
until 1200, then scattered showers and
thunderstorms. Near 8000 feet, scattered
showers and isolated thunderstorms until 1200,
then numerous showers and scattered
thunderstorms.
Chc of lightning....50 percent.
Max temperature.....67-77 F near 6000 feet
58-68 F near 8000 feet.
Min humidity........37-47%.
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming
upslope/upvalley 4 to 8 mph by 1100.
CWR.................10 percent.
15K Ft MSL Winds....Southwest 20 to 30 mph.
Mixing Height.......2000 ft AGL until 1100, then 5500 ft AGL.
Transport Winds.....Southeast 5 mph until 1200, then southwest 10
to 15 mph.
Smoke dispersal.....Poor until 0900. Good after 1200.
.FORECAST FOR DAY 3 THROUGH 7...
.SUNDAY...Mostly clear. Scattered showers and isolated
thunderstorms near 6000 feet and scattered showers and isolated
thunderstorms near 8000 feet. Lows 44-54. Highs 68-78. Winds less
than 15 mph.
.MONDAY...Mostly clear. Lows 42-52. Highs 71-81. Winds less than
15 mph.
.TUESDAY...Partly cloudy. Scattered showers and thunderstorms
near 6000 feet and numerous showers and scattered thunderstorms
near 8000 feet. Lows 45-55. Highs 68-78. Winds less than 15 mph.
.WEDNESDAY...Partly cloudy. Isolated showers and thunderstorms
near 6000 feet and scattered showers and thunderstorms near
8000 feet. Lows 43-53. Highs 69-79.
.THURSDAY...Partly cloudy. Isolated showers and thunderstorms
near 6000 feet and scattered showers and thunderstorms near
8000 feet. Lows 45-55. Highs 72-82.
$$
COZ293-181130-
Gunnison Basin Forecast Area-
122 PM MDT Thu Sep 17 2026
.TONIGHT...
Sky/weather.........Mostly cloudy (70-80%). Scattered showers and
isolated thunderstorms.
Chc of lightning....20 percent.
Min temperature.....47-57 F.
Max humidity........77-92%.
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming
downslope/downvalley 3 to 6 mph by sunset.
CWR.................40 percent.
15K Ft MSL Winds....Southwest 15 to 20 mph.
Mixing Height.......1000 ft AGL.
Transport Winds.....Southeast 5 mph.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Mostly cloudy (70-80%). Scattered showers and
isolated thunderstorms until 1200, then showers
and scattered thunderstorms.
Chc of lightning....50 percent.
Max temperature.....61-71 F.
Min humidity........48-58%.
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming
upslope/upvalley 4 to 8 mph by 1100.
CWR.................80 percent.
15K Ft MSL Winds....Southwest 15 to 20 mph.
Mixing Height.......3500 ft AGL.
Transport Winds.....South 5 mph until 1200, then west.
Smoke dispersal.....Poor.
.FRIDAY NIGHT...
Sky/weather.........Partly cloudy (50-60%). Scattered showers until
2400. Isolated thunderstorms. Numerous showers
after 2400.
Chc of lightning....20 percent.
Min temperature.....41-51 F.
Max humidity........74-89%.
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming
downslope/downvalley 3 to 6 mph by sunset.
CWR.................50 percent.
15K Ft MSL Winds....Southwest 20 to 25 mph.
Mixing Height.......1000 ft AGL.
Transport Winds.....Southeast 5 mph.
Smoke dispersal.....Poor.
.SATURDAY...
Sky/weather.........Partly cloudy (50-60%) until 1200, then mostly
cloudy (70-80%). Showers and isolated
thunderstorms until 1200, then numerous showers
and scattered thunderstorms.
Chc of lightning....50 percent.
Max temperature.....61-71 F.
Min humidity........39-49%.
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming
upslope/upvalley 4 to 8 mph by 1100.
CWR.................40 percent.
15K Ft MSL Winds....Southwest 20 to 25 mph.
Mixing Height.......2500 ft AGL until 1100, then 6500 ft AGL.
Transport Winds.....South 5 mph until 1200, then southwest 10 to 15
mph.
Smoke dispersal.....Poor until 0900. Good after 1200.
.FORECAST FOR DAY 3 THROUGH 7...
.SUNDAY...Mostly clear. Scattered showers and isolated
thunderstorms. Lows 36-46. Highs 60-70. Winds less than 15 mph.
.MONDAY...Mostly clear. Lows 34-44. Highs 62-72. Winds less than
15 mph.
.TUESDAY...Partly cloudy. Numerous showers and scattered
thunderstorms. Lows 36-46. Highs 59-69. Winds less than 15 mph.
.WEDNESDAY...Partly cloudy. Scattered showers and isolated
thunderstorms. Lows 36-46. Highs 60-70.
.THURSDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 37-47. Highs 62-72.
$$
COZ207-181130-
Southwest Colorado Lower Forecast Area-
122 PM MDT Thu Sep 17 2026
.TONIGHT...
Sky/weather.........Mostly cloudy (70-80%). Scattered showers and
thunderstorms.
Chc of lightning....50 percent.
Min temperature.....52-62 F.
Max humidity........78-93%.
20-foot winds.......Downslope/downvalley winds 3 to 6 mph.
Localized gusts up to 20 mph after midnight.
CWR.................50 percent.
15K Ft MSL Winds....Southwest 15 to 20 mph.
Mixing Height.......2500 ft AGL until 2000, then 500 ft AGL.
Transport Winds.....Southeast 5 to 10 mph.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Mostly cloudy (70-80%). Isolated thunderstorms
until 1200. Scattered showers. Scattered
thunderstorms after 1200.
Chc of lightning....50 percent.
Max temperature.....71-81 F.
Min humidity........40-50%.
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming
upslope/upvalley 4 to 8 mph by 1100.
CWR.................40 percent.
15K Ft MSL Winds....Southwest 20 to 25 mph.
Mixing Height.......5500 ft AGL.
Transport Winds.....South 5 to 10 mph.
Smoke dispersal.....Poor until 0900. Fair after 1200.
.FRIDAY NIGHT...
Sky/weather.........Partly cloudy (40-50%) until 2400, then mostly
cloudy (70-80%). Scattered showers and
thunderstorms until 2400, then numerous showers
and isolated thunderstorms.
Chc of lightning....50 percent.
Min temperature.....49-59 F.
Max humidity........78-93%.
20-foot winds.......Downslope/downvalley winds 3 to 6 mph.
Localized gusts up to 30 mph decreasing to 20
mph after midnight.
CWR.................40 percent.
15K Ft MSL Winds....Southwest 20 to 25 mph.
Mixing Height.......3500 ft AGL until 1900, then 1000 ft AGL.
Transport Winds.....Southeast 5 to 10 mph.
Smoke dispersal.....Poor.
.SATURDAY...
Sky/weather.........Partly cloudy (30-40%). Isolated thunderstorms
until 1200. Scattered showers. Scattered
thunderstorms after 1200.
Chc of lightning....20 percent.
Max temperature.....70-80 F.
Min humidity........29-39%.
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming
upslope/upvalley 4 to 8 mph by 1100.
CWR.................10 percent.
15K Ft MSL Winds....Southwest 20 to 25 mph.
Mixing Height.......1000 ft AGL until 1000. 8000 ft AGL after 1100.
Transport Winds.....Southeast 5 to 10 mph until 1200, then
southwest.
Smoke dispersal.....Poor until 0900. Good after 1200.
.FORECAST FOR DAY 3 THROUGH 7...
.SUNDAY...Clear. Lows 44-54. Highs 71-81. Winds less than 15 mph.
.MONDAY...Mostly clear. Lows 42-52. Highs 72-82. Winds less than
15 mph.
.TUESDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 45-55. Highs 69-79. Winds less than 15 mph.
.WEDNESDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 43-53. Highs 69-79.
.THURSDAY...Partly cloudy. Scattered showers and isolated
thunderstorms. Lows 44-54. Highs 70-80.
$$
COZ294-181130-
Southwest Colorado Upper West Forecast Area-
122 PM MDT Thu Sep 17 2026
.TONIGHT...
Sky/weather.........Mostly cloudy (70-80%). Scattered showers and
thunderstorms.
Chc of lightning....50 percent.
Min temperature.....48-58 F.
Max humidity........85-100%.
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming
downslope/downvalley 3 to 6 mph by sunset.
CWR.................50 percent.
15K Ft MSL Winds....Southwest 15 to 20 mph.
Mixing Height.......1000 ft AGL.
Transport Winds.....Southeast 5 to 10 mph.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Mostly cloudy (70-80%). Isolated thunderstorms
until 1200. Scattered showers. Scattered
thunderstorms after 1200.
Chc of lightning....50 percent.
Max temperature.....57-67 F.
Min humidity........48-58%.
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming
upslope/upvalley 4 to 8 mph by 1100.
CWR.................40 percent.
15K Ft MSL Winds....Southwest 20 to 25 mph.
Mixing Height.......5000 ft AGL.
Transport Winds.....South 5 to 10 mph.
Smoke dispersal.....Poor until 0900. Fair after 1200.
.FRIDAY NIGHT...
Sky/weather.........Partly cloudy (50-60%) until 2400, then mostly
cloudy (70-80%). Scattered showers and
thunderstorms until 2400, then numerous showers
and isolated thunderstorms.
Chc of lightning....50 percent.
Min temperature.....44-54 F.
Max humidity........82-97%.
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming
downslope/downvalley 3 to 6 mph by sunset.
CWR.................50 percent.
15K Ft MSL Winds....Southwest 20 to 25 mph.
Mixing Height.......2500 ft AGL until 2000, then 500 ft AGL.
Transport Winds.....Southeast 5 to 10 mph.
Smoke dispersal.....Poor.
.SATURDAY...
Sky/weather.........Partly cloudy (40-50%). Scattered showers until
1200. Isolated thunderstorms. Isolated showers
after 1200.
Chc of lightning....20 percent.
Max temperature.....58-68 F.
Min humidity........34-44%.
20-foot winds.......Upslope/upvalley winds 4 to 8 mph. Localized
gusts up to 20 mph increasing to 30 mph in the
afternoon.
CWR.................10 percent.
15K Ft MSL Winds....Southwest 20 to 25 mph.
Mixing Height.......2000 ft AGL until 1000, then 8000 ft AGL.
Transport Winds.....South 5 to 10 mph.
Smoke dispersal.....Poor until 0900. Very good after 1200.
.FORECAST FOR DAY 3 THROUGH 7...
.SUNDAY...Clear. Lows 37-47. Highs 61-71. Winds less than 15 mph.
.MONDAY...Mostly clear. Lows 36-46. Highs 63-73. Winds less than
15 mph.
.TUESDAY...Mostly cloudy. Numerous showers and scattered
thunderstorms. Lows 39-49. Highs 58-68. Winds less than 15 mph.
.WEDNESDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 37-47. Highs 59-69.
.THURSDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 38-48. Highs 60-70.
$$
COZ295-181130-
Southwest Colorado Upper East Forecast Area-
122 PM MDT Thu Sep 17 2026
.TONIGHT...
Sky/weather.........Mostly cloudy (80-90%). Showers and scattered
thunderstorms until 2400, then numerous showers
and isolated thunderstorms.
Chc of lightning....50 percent.
Min temperature.....46-56 F.
Max humidity........84-99%.
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming
downslope/downvalley 3 to 6 mph by sunset.
CWR.................100 percent.
15K Ft MSL Winds....Southwest 20 to 25 mph.
Mixing Height.......1000 ft AGL.
Transport Winds.....Southeast 5 mph.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Mostly cloudy (70-80%). Isolated thunderstorms
until 1200. Numerous showers. Scattered
thunderstorms after 1200.
Chc of lightning....50 percent.
Max temperature.....60-70 F.
Min humidity........51-61%.
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming
upslope/upvalley 4 to 8 mph by 1100.
CWR.................70 percent.
15K Ft MSL Winds....Southwest 15 to 20 mph.
Mixing Height.......3500 ft AGL.
Transport Winds.....South 5 mph.
Smoke dispersal.....Poor.
.FRIDAY NIGHT...
Sky/weather.........Mostly cloudy (60-70%). Scattered showers and
thunderstorms until 2400, then numerous showers
and isolated thunderstorms.
Chc of lightning....50 percent.
Min temperature.....42-52 F.
Max humidity........79-94%.
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming
downslope/downvalley 3 to 6 mph by sunset.
CWR.................50 percent.
15K Ft MSL Winds....West 20 to 25 mph.
Mixing Height.......1000 ft AGL.
Transport Winds.....Southeast 5 mph until 2400, then northeast.
Smoke dispersal.....Poor.
.SATURDAY...
Sky/weather.........Partly cloudy (40-50%). Isolated thunderstorms
until 1200. Scattered showers. Scattered
thunderstorms after 1200.
Chc of lightning....40 percent.
Max temperature.....62-72 F.
Min humidity........34-44%.
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming
upslope/upvalley 4 to 8 mph by 1100.
CWR.................10 percent.
15K Ft MSL Winds....Southwest 20 to 30 mph.
Mixing Height.......2500 ft AGL until 1100, then 7500 ft AGL.
Transport Winds.....South 5 mph until 1200, then southwest 10 to 15
mph.
Smoke dispersal.....Poor until 0900. Good after 1200.
.FORECAST FOR DAY 3 THROUGH 7...
.SUNDAY...Mostly clear. Lows 36-46. Highs 64-74. Winds less than
15 mph.
.MONDAY...Partly cloudy. Lows 36-46. Highs 64-74. Winds less than
15 mph.
.TUESDAY...Mostly cloudy. Numerous showers and scattered
thunderstorms. Lows 38-48. Highs 59-69. Winds less than 15 mph.
.WEDNESDAY...Mostly cloudy. Numerous showers and scattered
thunderstorms. Lows 38-48. Highs 60-70.
.THURSDAY...Mostly cloudy. Scattered showers and thunderstorms.
Lows 38-48. Highs 61-71.
$$
UTZ485-181130-
Eastern Ashley National Forest-
122 PM MDT Thu Sep 17 2026
.TONIGHT...
Sky/weather.........Near 7000 feet, mostly cloudy (60-70%) until
2400, then partly cloudy (50-60%). Near 10000
feet, mostly cloudy (70-80%). Scattered
thunderstorms until 2400. Scattered showers.
Isolated thunderstorms after 2400.
Chc of lightning....30 percent.
Min temperature.....48-58 F near 7000 feet
39-49 F near 10000 feet.
24 hr trend......Unchanged.
Max humidity........77-92% near 7000 feet
87-100% near 10000 feet.
24 hr trend......15% drier.
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming
downslope/downvalley 3 to 6 mph by sunset.
CWR.................20 percent.
Mixing Height.......3500 ft AGL until 1900, then 1000 ft AGL.
Transport Winds.....Southwest 5 to 10 mph.
Clearing Index......Less than 500.
.FRIDAY...
Sky/weather.........Mostly cloudy (70-80%). Near 7000 feet,
scattered showers and isolated thunderstorms
until 1200, then numerous showers and scattered
thunderstorms. Near 10000 feet, numerous
showers and isolated thunderstorms until 1200,
then showers and scattered thunderstorms.
Chc of lightning....50 percent.
Max temperature.....63-73 F near 7000 feet
54-64 F near 10000 feet.
24 hr trend......1 degree cooler.
Min humidity........49-59% near 7000 feet
63-78% near 10000 feet.
24 hr trend......9% drier.
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming
upslope/upvalley 4 to 8 mph by 1100.
CWR.................60 percent.
Mixing Height.......5000 ft AGL.
Transport Winds.....South 5 to 10 mph.
Clearing Index......Less than 500 until 1000. 1050 after 1200.
.FRIDAY NIGHT...
Sky/weather.........Mostly cloudy (70-80%). Showers and scattered
thunderstorms until 2400. Scattered showers and
isolated thunderstorms after 2400.
Chc of lightning....50 percent.
Min temperature.....43-53 F near 7000 feet
33-43 F near 10000 feet.
24 hr trend......5 degrees cooler.
Max humidity........77-92% near 7000 feet
86-100% near 10000 feet.
24 hr trend......1% drier.
20-foot winds.......Downslope/downvalley winds 3 to 6 mph.
Localized gusts up to 20 mph in the evening.
CWR.................90 percent.
Mixing Height.......1000 ft AGL.
Transport Winds.....Southwest 5 mph.
Clearing Index......800 until 1900. Less than 500 after 2000.
.SATURDAY...
Sky/weather.........Partly cloudy (50-60%) until 1200, then mostly
cloudy (70-80%). Scattered showers until 1200,
then showers and scattered thunderstorms.
Chc of lightning....50 percent.
Max temperature.....55-65 F near 7000 feet
48-58 F near 10000 feet.
24 hr trend......7 degrees cooler.
Min humidity........50-60% near 7000 feet
56-66% near 10000 feet.
24 hr trend......6% wetter.
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming
upslope/upvalley 4 to 8 mph by 1100.
CWR.................50 percent.
Mixing Height.......2500 ft AGL until 1100, then 5000 ft AGL.
Transport Winds.....Southwest 5 mph until 1200, then 10 to 15 mph.
Clearing Index......Less than 500 until 1100. 1050 after 1200.
.FORECAST FOR DAY 3 THROUGH 7...
.SUNDAY...Partly cloudy. Scattered showers and isolated
thunderstorms near 7000 feet and scattered showers and isolated
thunderstorms near 10000 feet. Lows 38-48. Highs 57-67. Winds
less than 15 mph.
.MONDAY...Mostly clear. Isolated showers and thunderstorms near
10000 feet. Lows 39-49. Highs 62-72. Winds less than 15 mph.
.TUESDAY...Partly cloudy. Scattered showers and thunderstorms .
Lows 43-53. Highs 61-71. Winds less than 15 mph.
.WEDNESDAY...Partly cloudy. Isolated showers and thunderstorms
near 7000 feet and scattered showers and thunderstorms near
10000 feet. Lows 41-51. Highs 63-73.
.THURSDAY...Partly cloudy. Isolated showers and thunderstorms .
Lows 43-53. Highs 65-75.
$$
UTZ486-181130-
Eastern Uinta Basin-
122 PM MDT Thu Sep 17 2026
.TONIGHT...
Sky/weather.........Partly cloudy (50-60%). Scattered thunderstorms
until 2400. Scattered showers. Isolated
thunderstorms after 2400.
Chc of lightning....50 percent.
Min temperature.....50-60 F.
24 hr trend......2 degrees warmer.
Max humidity........74-89%.
24 hr trend......20% drier.
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming
downslope/downvalley 3 to 6 mph by sunset.
CWR.................30 percent.
Mixing Height.......1000 ft AGL.
Transport Winds.....Southwest 5 mph.
Clearing Index......Less than 500.
.FRIDAY...
Sky/weather.........Mostly cloudy (70-80%). Near 5000 feet,
numerous showers and isolated thunderstorms
until 1200, then showers and scattered
thunderstorms. Near 8000 feet, scattered
showers and isolated thunderstorms until 1200,
then numerous showers and scattered
thunderstorms.
Chc of lightning....50 percent.
Max temperature.....64-74 F near 5000 feet
55-65 F near 8000 feet.
24 hr trend......1 degree warmer.
Min humidity........51-61%.
24 hr trend......7% drier.
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming
upslope/upvalley 4 to 8 mph by 1100.
CWR.................60 percent.
Mixing Height.......4500 ft AGL.
Transport Winds.....South 5 mph.
Clearing Index......Less than 500 until 1200. 1050 after 1300.
.FRIDAY NIGHT...
Sky/weather.........Mostly cloudy (70-80%). Showers and scattered
thunderstorms until 2400. Scattered showers and
isolated thunderstorms after 2400.
Chc of lightning....50 percent.
Min temperature.....46-56 F.
24 hr trend......5 degrees cooler.
Max humidity........77-92%.
24 hr trend......3% wetter.
20-foot winds.......Downslope/downvalley winds 3 to 6 mph.
Localized gusts up to 20 mph in the evening.
CWR.................90 percent.
Mixing Height.......1000 ft AGL.
Transport Winds.....West 5 to 10 mph until 2400, then northeast.
Clearing Index......650 until 1900, then less than 500.
.SATURDAY...
Sky/weather.........Partly cloudy (50-60%) until 1200, then mostly
cloudy (70-80%). Near 5000 feet, isolated
thunderstorms until 1200. Scattered showers.
Scattered thunderstorms after 1200. Near 8000
feet, scattered showers and isolated
thunderstorms until 1200, then showers and
scattered thunderstorms.
Chc of lightning....50 percent.
Max temperature.....60-70 F near 5000 feet
50-60 F near 8000 feet.
24 hr trend......4 degrees cooler.
Min humidity........47-57% near 5000 feet
53-63% near 8000 feet.
24 hr trend......2% drier.
20-foot winds.......Upslope/upvalley winds 4 to 8 mph. Localized
gusts up to 20 mph in the afternoon.
CWR.................10 percent.
Mixing Height.......2000 ft AGL until 1100, then 5000 ft AGL.
Transport Winds.....Southwest 5 mph until 1200, then 10 to 15 mph.
Clearing Index......Less than 500 until 1100. 1050 after 1200.
.FORECAST FOR DAY 3 THROUGH 7...
.SUNDAY...Partly cloudy. Scattered showers and isolated
thunderstorms. Lows 42-52. Highs 61-71. Winds less than 15 mph.
.MONDAY...Mostly clear. Lows 43-53. Highs 66-76. Winds less than
15 mph.
.TUESDAY...Partly cloudy. Scattered showers and isolated
thunderstorms near 6000 feet and scattered showers and isolated
thunderstorms near 8000 feet. Lows 46-56. Highs 65-75. Winds
less than 15 mph.
.WEDNESDAY...Partly cloudy. Isolated showers and thunderstorms .
Lows 45-55. Highs 67-77.
.THURSDAY...Mostly clear. Isolated showers and thunderstorms.
Lows 46-56. Highs 69-79.
$$
UTZ487-181130-
Book Cliffs-
122 PM MDT Thu Sep 17 2026
.TONIGHT...
Sky/weather.........Partly cloudy (50-60%) until 2400, then mostly
cloudy (60-70%). Scattered thunderstorms until
2400. Scattered showers. Isolated thunderstorms
after 2400.
Chc of lightning....50 percent.
Min temperature.....51-61 F near 5000 feet
45-55 F near 8000 feet.
24 hr trend......1 degree warmer.
Max humidity........77-92% near 5000 feet
83-98% near 8000 feet.
24 hr trend......17% drier.
20-foot winds.......Downslope/downvalley winds 3 to 6 mph.
Localized gusts up to 20 mph in the evening.
CWR.................50 percent.
Mixing Height.......3000 ft AGL until 2000, then 500 ft AGL.
Transport Winds.....South 5 mph.
Clearing Index......Less than 500.
.FRIDAY...
Sky/weather.........Mostly cloudy (70-80%). Near 5000 feet,
isolated thunderstorms until 1200. Numerous
showers. Scattered thunderstorms after 1200.
near 8000 feet, numerous showers and scattered
thunderstorms.
Chc of lightning....50 percent.
Max temperature.....65-75 F near 5000 feet
58-68 F near 8000 feet.
24 hr trend......1 degree warmer.
Min humidity........45-55% near 5000 feet
55-70% near 8000 feet.
24 hr trend......5% drier.
20-foot winds.......Upslope/upvalley winds 4 to 8 mph. Localized
gusts up to 20 mph in the afternoon.
CWR.................60 percent.
Mixing Height.......5000 ft AGL.
Transport Winds.....South 5 to 10 mph.
Clearing Index......Less than 500 until 1000. 1050 after 1300.
.FRIDAY NIGHT...
Sky/weather.........Mostly cloudy (70-80%). Near 5000 feet,
scattered thunderstorms until 2400. Showers.
Isolated thunderstorms after 2400. Near 8000
feet, numerous showers and scattered
thunderstorms until 2400, then showers and
isolated thunderstorms.
Chc of lightning....50 percent.
Min temperature.....47-57 F near 5000 feet
41-51 F near 8000 feet.
24 hr trend......3 degrees cooler.
Max humidity........79-94%.
24 hr trend......4% wetter.
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming
downslope/downvalley 3 to 6 mph by sunset.
CWR.................80 percent.
Mixing Height.......1500 ft AGL.
Transport Winds.....Southeast 5 mph.
Clearing Index......1050 until 1900, then less than 500.
.SATURDAY...
Sky/weather.........Near 5000 feet, mostly cloudy (60-70%),
scattered showers and isolated thunderstorms
until 1200, then numerous showers and scattered
thunderstorms. Near 8000 feet, mostly cloudy
(70-80%) until 1200, then partly cloudy
(50-60%), numerous showers and isolated
thunderstorms until 1200, then scattered
showers and thunderstorms.
Chc of lightning....50 percent.
Max temperature.....59-69 F near 5000 feet
56-66 F near 8000 feet.
24 hr trend......4 degrees cooler.
Min humidity........43-53%.
24 hr trend......3% drier.
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming
upslope/upvalley 4 to 8 mph by 1100.
CWR.................40 percent.
Mixing Height.......2000 ft AGL until 1100, then 7000 ft AGL.
Transport Winds.....Southwest 5 mph until 1200, then 10 to 15 mph.
Clearing Index......Less than 500 until 1100. 1050 after 1200.
.FORECAST FOR DAY 3 THROUGH 7...
.SUNDAY...Mostly clear. Scattered showers and isolated
thunderstorms near 6000 feet and isolated showers and
thunderstorms near 8000 feet. Lows 41-51. Highs 64-74. Winds
less than 15 mph.
.MONDAY...Mostly clear. Lows 42-52. Highs 68-78. Winds less than
15 mph.
.TUESDAY...Partly cloudy. Scattered showers and thunderstorms .
Lows 45-55. Highs 66-76. Winds less than 15 mph.
.WEDNESDAY...Partly cloudy. Isolated showers and thunderstorms
near 6000 feet and scattered showers and thunderstorms near
8000 feet. Lows 43-53. Highs 68-78.
.THURSDAY...Partly cloudy. Isolated showers and thunderstorms .
Lows 45-55. Highs 70-80.
$$
UTZ490-181130-
Colorado River Basin-
122 PM MDT Thu Sep 17 2026
.TONIGHT...
Sky/weather.........Partly cloudy (50-60%) until 2400, then mostly
cloudy (60-70%). Near 5000 feet, scattered
showers and isolated thunderstorms. Near 7000
feet, scattered thunderstorms until 2400.
Scattered showers. Isolated thunderstorms after
2400.
Chc of lightning....20 percent.
Min temperature.....56-66 F.
24 hr trend......3 degrees warmer.
Max humidity........70-85%.
24 hr trend......13% drier.
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming
downslope/downvalley 3 to 6 mph by sunset.
CWR.................60 percent.
Mixing Height.......4500 ft AGL until 1900. 500 ft AGL after 2000.
Transport Winds.....East 5 mph.
Clearing Index......Less than 500.
.FRIDAY...
Sky/weather.........Mostly cloudy (70-80%). Near 5000 feet,
numerous showers and isolated thunderstorms
until 1200, then scattered showers and
thunderstorms. Near 7000 feet, numerous
showers until 1200. Scattered thunderstorms.
Scattered showers after 1200.
Chc of lightning....50 percent.
Max temperature.....73-83 F near 5000 feet
62-72 F near 7000 feet.
24 hr trend......2 degrees warmer.
Min humidity........42-52% near 5000 feet
51-61% near 7000 feet.
24 hr trend......8% drier.
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming
upslope/upvalley 4 to 8 mph by 1100.
CWR.................50 percent.
Mixing Height.......2500 ft AGL until 1200, then 5500 ft AGL.
Transport Winds.....Southeast 5 mph.
Clearing Index......Less than 500 until 1100. 1050 after 1300.
.FRIDAY NIGHT...
Sky/weather.........Mostly cloudy (70-80%). Scattered showers and
thunderstorms until 2400, then showers and
isolated thunderstorms.
Chc of lightning....50 percent.
Min temperature.....52-62 F.
24 hr trend......5 degrees cooler.
Max humidity........71-86%.
24 hr trend......4% wetter.
20-foot winds.......Downslope/downvalley winds 3 to 6 mph.
Localized gusts up to 20 mph in the evening.
CWR.................60 percent.
Mixing Height.......5000 ft AGL until 1900, then 1000 ft AGL.
Transport Winds.....East 5 mph.
Clearing Index......1050 until 1900, then less than 500.
.SATURDAY...
Sky/weather.........Near 5000 feet, partly cloudy (40-50%),
scattered showers until 1200. Isolated
thunderstorms. Isolated showers after 1200.
near 7000 feet, mostly cloudy (60-70%) until
1200, then partly cloudy (40-50%), numerous
showers and isolated thunderstorms until 1200,
then scattered showers and thunderstorms.
Chc of lightning....20 percent.
Max temperature.....71-81 F near 5000 feet
60-70 F near 7000 feet.
24 hr trend......2 degrees cooler.
Min humidity........39-49% near 5000 feet
46-56% near 7000 feet.
24 hr trend......3% drier.
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming
upslope/upvalley 4 to 8 mph by 1100.
CWR.................10 percent.
Mixing Height.......2000 ft AGL until 1100, then 8000 ft AGL.
Transport Winds.....East 5 mph until 1200, then southwest 10 to 15
mph.
Clearing Index......Less than 500 until 1300, then 1050.
.FORECAST FOR DAY 3 THROUGH 7...
.SUNDAY...Mostly clear. Isolated showers and thunderstorms . Lows
48-58. Highs 70-80. Winds less than 15 mph.
.MONDAY...Mostly clear. Lows 47-57. Highs 73-83. Winds less than
15 mph.
.TUESDAY...Partly cloudy. Scattered showers and isolated
thunderstorms near 5000 feet and scattered showers and
thunderstorms near 7000 feet. Lows 50-60. Highs 70-80. Winds
less than 15 mph.
.WEDNESDAY...Partly cloudy. Isolated showers and thunderstorms .
Lows 47-57. Highs 71-81.
.THURSDAY...Partly cloudy. Isolated showers and thunderstorms .
Lows 50-60. Highs 74-84.
$$
UTZ491-181130-
Southeast Utah-
122 PM MDT Thu Sep 17 2026
.TONIGHT...
Sky/weather.........Mostly cloudy (60-70%). Scattered showers and
thunderstorms.
Chc of lightning....40 percent.
Min temperature.....57-67 F near 5000 feet
49-59 F near 8000 feet.
24 hr trend......2 degrees warmer.
Max humidity........72-87% near 5000 feet
79-94% near 8000 feet.
24 hr trend......14% drier.
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming
downslope/downvalley 3 to 6 mph by sunset.
CWR.................40 percent.
Mixing Height.......4500 ft AGL until 1900, then 1500 ft AGL.
Transport Winds.....Southeast 5 to 10 mph.
Clearing Index......Less than 500.
.FRIDAY...
Sky/weather.........Near 5000 feet, partly cloudy (40-50%),
isolated thunderstorms until 1200. Scattered
showers. Scattered thunderstorms after 1200.
near 8000 feet, mostly cloudy (70-80%),
numerous showers and isolated thunderstorms
until 1200, then scattered showers and
thunderstorms.
Chc of lightning....30 percent.
Max temperature.....73-83 F near 5000 feet
59-69 F near 8000 feet.
24 hr trend......5 degrees warmer.
Min humidity........35-45% near 5000 feet
46-56% near 8000 feet.
24 hr trend......12% drier.
20-foot winds.......Upslope/upvalley winds 4 to 8 mph. Localized
gusts up to 30 mph.
CWR.................40 percent.
Mixing Height.......8000 ft AGL.
Transport Winds.....South 5 to 10 mph.
Clearing Index......Less than 500 until 1100. 1050 after 1300.
.FRIDAY NIGHT...
Sky/weather.........Near 5000 feet, partly cloudy (40-50%),
scattered thunderstorms until 2400. Scattered
showers. Isolated thunderstorms after 2400.
near 8000 feet, partly cloudy (50-60%) until
2400, then mostly cloudy (70-80%), scattered
showers and thunderstorms until 2400, then
showers and isolated thunderstorms.
Chc of lightning....50 percent.
Min temperature.....54-64 F near 5000 feet
45-55 F near 8000 feet.
24 hr trend......3 degrees cooler.
Max humidity........70-85% near 5000 feet
76-91% near 8000 feet.
24 hr trend......1% drier.
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming
downslope/downvalley 3 to 6 mph by sunset.
CWR.................50 percent.
Mixing Height.......5500 ft AGL until 2000, then 1000 ft AGL.
Transport Winds.....Southeast 5 to 10 mph.
Clearing Index......950 until 1900, then less than 500.
.SATURDAY...
Sky/weather.........Near 5000 feet, partly cloudy (30-40%) until
1200, then mostly sunny (20-30%), isolated
showers and thunderstorms. Near 8000 feet,
partly cloudy (40-50%), numerous showers and
isolated thunderstorms until 1200, then
scattered showers and thunderstorms.
Chc of lightning....10 percent.
Max temperature.....72-82 F near 5000 feet
57-67 F near 8000 feet.
24 hr trend......1 degree cooler.
Min humidity........28-38% near 5000 feet
37-47% near 8000 feet.
24 hr trend......8% drier.
20-foot winds.......Upslope/upvalley winds 4 to 8 mph. Localized
gusts up to 20 mph.
CWR.................10 percent.
Mixing Height.......2000 ft AGL until 1100, then 8500 ft AGL.
Transport Winds.....Southeast 5 mph until 1200, then southwest.
Clearing Index......Less than 500 until 1100. 1000 after 1300.
.FORECAST FOR DAY 3 THROUGH 7...
.SUNDAY...Mostly clear. Lows 50-60. Highs 73-83. Winds less than
15 mph.
.MONDAY...Partly cloudy. Isolated showers and thunderstorms near
8000 feet. Lows 49-59. Highs 74-84. Winds less than 15 mph.
.TUESDAY...Partly cloudy. Scattered showers and isolated
thunderstorms near 5000 feet and scattered showers and
thunderstorms near 8000 feet. Lows 50-60. Highs 71-81. Winds
less than 15 mph.
.WEDNESDAY...Partly cloudy. Scattered showers and isolated
thunderstorms near 5000 feet and scattered showers and
thunderstorms near 8000 feet. Lows 48-58. Highs 71-81.
.THURSDAY...Partly cloudy. Scattered showers and isolated
thunderstorms near 5000 feet and scattered showers and isolated
thunderstorms near 8000 feet. Lows 50-60. Highs 73-83.
$$