COZ205-221130-
COZ205-221130-
Colorado River Headwaters-
125 PM MDT Thu May 21 2026

Fire Weather Planning Forecast for Wrn Colorado and Ern Utah
National Weather Service Grand Junction CO
125 PM MDT Thu May 21 2026

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS EVENING
FOR GUSTY WINDS, LOW HUMIDITY AND DRY FUELS FOR COLORADO FIRE
WEATHER ZONES 207 AND 290, AS WELL AS UTAH FIRE WEATHER ZONE
490... 

.DISCUSSION...Pre frontal winds and low humidity will keep a 
threat of critical fire weather conditions in place over portions 
of SW Colorado and east-central Utah this afternoon. The
front settles near the southern border overnight and post
frontal winds will leave localized areas of critical fire
weather in place for Friday in far southwest Colorado. Warmer
conditions arrive for the weekend with a downward trend in
afternoon gusts limiting the fire weather threat into early next
week. 

...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.........Partly cloudy (40-50%). Scattered showers and 
                    isolated thunderstorms until 2400, isolated 
                    showers after 2400. 
Chc of lightning....20 percent. 
Min temperature.....26-36 F. 
Max humidity........72-87%. 
20-foot winds.......Downslope/downvalley winds 3 to 6 mph. 
                    Localized gusts up to 35 mph in the evening. 
CWR.................10 percent. 
15K Ft MSL Winds....West 30 to 40 mph. 
Mixing Height.......9000 ft AGL until 2000. 1000 ft AGL after 2200. 
Transport Winds.....Northwest 10 to 15 mph until 2400, then 5 mph. 
Smoke dispersal.....Very good until 2100. Poor after 2400. 

.FRIDAY...
Sky/weather.........Partly cloudy (40-50%) until 1200, then mostly 
                    cloudy (60-70%). Isolated showers after 1200. 
Chc of lightning....0 percent. 
Max temperature.....53-63 F. 
Min humidity........18-28%. 
20-foot winds.......Upslope/upvalley winds 4 to 8 mph. Localized 
                    gusts up to 25 mph in the afternoon. 
CWR.................0 percent. 
15K Ft MSL Winds....West 20 to 30 mph decreasing to 15 to 20 mph in 
                    the afternoon. 
Mixing Height.......8500 ft AGL. 
Transport Winds.....West 5 mph until 1200, then 10 to 15 mph. 
Smoke dispersal.....Poor until 0900. Very good after 1200. 

.FRIDAY NIGHT...
Sky/weather.........Mostly cloudy (70-80%) until 2400, then partly 
                    cloudy (50-60%). Isolated showers. 
Chc of lightning....0 percent. 
Min temperature.....32-42 F. 
Max humidity........62-77%. 
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....West 20 to 25 mph. 
Mixing Height.......5500 ft AGL until 2100, then 1000 ft AGL. 
Transport Winds.....West 5 to 10 mph until 2400, then south. 
Smoke dispersal.....Fair until 2100, then poor. 

.SATURDAY...
Sky/weather.........Partly cloudy (30-40%). Isolated showers after 
                    1200. 
Chc of lightning....0 percent. 
Max temperature.....60-70 F. 
Min humidity........16-26%. 
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming 
                    upslope/upvalley 4 to 8 mph by 1100.
CWR.................0 percent. 
15K Ft MSL Winds....West 20 to 25 mph. 
Mixing Height.......1000 ft AGL until 0800. 9500 ft AGL after 0900. 
Transport Winds.....West 5 to 10 mph. 
Smoke dispersal.....Poor until 0900. Very good after 1200. 

.FORECAST FOR DAY 3 THROUGH 7...
.SUNDAY...Mostly clear. Isolated showers and thunderstorms. Lows
34-44. Highs 66-76. Winds less than 15 mph. 
.MEMORIAL DAY...Mostly clear. Scattered showers and
thunderstorms. Lows 37-47. Highs 69-79. Winds less than 15 mph. 
.TUESDAY...Mostly cloudy. Showers and scattered thunderstorms.
Lows 38-48. Highs 61-71. Winds less than 15 mph. 
.WEDNESDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 36-46. Highs 64-74. 
.THURSDAY...Partly cloudy. Isolated showers and thunderstorms.
Lows 36-46. Highs 64-74.