National Weather Service United States Department of Commerce

Record Heat Remains in Place This Week; Severe Thunderstorms Possible Thursday

Record warmth will persist across portions of California, the Southwest U.S., the central Great Basin and return back to areas of the central/southern Plains and mid-lower Mississippi Valley this week. Over 200 new record high temperatures are forecast. Severe thunderstorms are being outlooked on Thursday over the Midwest. Read More >

COZ205-240945-
COZ205-240945-
Colorado River Headwaters-
1141 AM MDT Mon Mar 23 2026

Fire Weather Planning Forecast for Wrn Colorado and Ern Utah
National Weather Service Grand Junction CO
1141 AM MDT Mon Mar 23 2026

...FIRE WEATHER WATCH IN EFFECT WEDNESDAY AND THRUSDAY AFTERNOON  
THROUGH WEDNESDAY EVENING FOR GUSTY WINDS, LOW HUMIDITY AND DRY 
FUELS FOR COLORADO FIRE WEATHER ZONES 200 BELOW 8000 FEET, 201 
BELOW 9000 FEET AND 202 BELOW 8000 FEET...

.DISCUSSION...A stronger jet will sag southward, allowing stronger 
winds to mix down to the surface as the pressure gradient 
tightens on Wednesday into Thursday. Relative humidity values will
fall back below 15 percent with gustier winds, especially across 
the northern zones leading to critical fire weather conditions 
once again. Winds subside Friday, but continued low relative 
humidities and afternoon gusts are expected to keep some level of 
localized critical fire weather conditions in the forecast into 
the coming weekend. 


...GUSTY ERRATIC WINDS CAN BE EXPECTED NEAR ANY SHOWERS
OR THUNDERSTORMS...
...THE SMOKE DATA IS CALCULATED FROM AN AVERAGE AT 6000 FEET MSL...


.TONIGHT...
Sky/weather.........Mostly cloudy (60-70%) until 2400, then partly 
                    cloudy (50-60%). Isolated showers until 2400. 
Chc of lightning....0 percent. 
Min temperature.....39-49 F. 
Max humidity........54-64%. 
20-foot winds.......Downslope/downvalley winds 3 to 6 mph. 
                    Localized gusts up to 25 mph in the evening. 
CWR.................10 percent. 
15K Ft MSL Winds....West 30 to 40 mph increasing to 35 to 45 mph 
                    after midnight. 
Mixing Height.......6500 ft AGL until 1900, then 2500 ft AGL. 
Transport Winds.....Southwest 5 to 10 mph. 
Smoke dispersal.....Fair until 2100, then poor. 

.TUESDAY...
Sky/weather.........Partly cloudy (40-50%) until 1200, then mostly 
                    sunny (20-30%). 
Chc of lightning....0 percent. 
Max temperature.....62-72 F. 
Min humidity........20-30%. 
20-foot winds.......Upslope/upvalley winds 4 to 8 mph. Localized 
                    gusts up to 20 mph increasing to 30 mph in the 
                    afternoon. 
CWR.................0 percent. 
15K Ft MSL Winds....Northwest 35 to 45 mph. 
Mixing Height.......7500 ft AGL. 
Transport Winds.....West 5 to 10 mph until 1200, then 15 to 20 mph. 
Smoke dispersal.....Poor until 0900. Very good after 1200. 

.TUESDAY NIGHT...
Sky/weather.........Mostly clear (10-20%). 
Chc of lightning....0 percent. 
Min temperature.....41-51 F. 
Max humidity........55-65%. 
20-foot winds.......Downslope/downvalley winds 3 to 6 mph. 
                    Localized gusts up to 30 mph in the evening. 
CWR.................0 percent. 
15K Ft MSL Winds....Northwest 25 to 35 mph. 
Mixing Height.......6000 ft AGL until 2000, then 2500 ft AGL. 
Transport Winds.....Southwest 5 to 10 mph. 
Smoke dispersal.....Fair until 2100, then poor. 

.WEDNESDAY...
Sky/weather.........Sunny (0-10%). 
Chc of lightning....0 percent. 
Max temperature.....66-76 F. 
Min humidity........15-25%. 
20-foot winds.......Upslope/upvalley winds 4 to 8 mph. Localized 
                    gusts up to 30 mph in the afternoon. 
CWR.................0 percent. 
15K Ft MSL Winds....West 20 to 30 mph. 
Mixing Height.......3000 ft AGL until 1100, then 8000 ft AGL. 
Transport Winds.....Southwest 5 to 10 mph until 1200, then west 20 
                    to 25 mph. 
Smoke dispersal.....Poor until 0900. Very good after 1200. 

.FORECAST FOR DAY 3 THROUGH 7...
.THURSDAY...Clear. Isolated showers. Lows 40-50. Highs 63-73.
West winds 10 to 20 mph with gusts to  35 mph. 
.FRIDAY...Partly cloudy. Isolated showers. Lows 32-42. Highs
57-67. Winds less than 15 mph. 
.SATURDAY...Partly cloudy. Isolated showers. Lows 31-41. Highs
58-68. West winds 10 to 20 mph with gusts to  30 mph. 
.SUNDAY...Mostly cloudy. Scattered showers and isolated
thunderstorms. Lows 34-44. Highs 57-67. 
.MONDAY...Mostly cloudy. Scattered showers. Lows 34-44. Highs
51-61.