COZ205-131245-
COZ205-131245-
Colorado River Headwaters-
242 PM MDT Wed Aug 12 2026

Fire Weather Planning Forecast for Wrn Colorado and Ern Utah
National Weather Service Grand Junction CO
242 PM MDT Wed Aug 12 2026

.DISCUSSION...
Elevated moisture keeps critical fire weather conditions out of
the forecast through the end of the week. Coverage of shower
activity becomes more widespread today, and begins to peak by 
Thursday. Localized heavy rainfall may pose a threat to flash 
flooding and debris flows, especially over recent burn scars. 
Additional concerns with these storms include lightning and gusty 
outflows. Daytime highs begin to cool today, with the cooling 
trend continuing through the 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.........Partly cloudy (40-50%). Numerous showers and 
                    scattered thunderstorms until 2400, scattered 
                    showers and isolated thunderstorms after 2400. 
Chc of lightning....50 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.................50 percent. 
15K Ft MSL Winds....Southwest 10 to 15 mph increasing to 20 to 25 
                    mph after midnight. 
Mixing Height.......1000 ft AGL. 
Transport Winds.....South 5 mph. 
Smoke dispersal.....Poor. 

.THURSDAY...
Sky/weather.........Partly cloudy (50-60%) until 1200, then mostly 
                    cloudy (70-80%). Scattered showers and isolated 
                    thunderstorms until 1200, then numerous showers 
                    and scattered thunderstorms. 
Chc of lightning....50 percent. 
Max temperature.....71-81 F. 
Min humidity........33-43%. 
20-foot winds.......Upslope/upvalley winds 4 to 8 mph. Localized 
                    gusts up to 25 mph in the afternoon. 
CWR.................70 percent. 
15K Ft MSL Winds....Southwest 15 to 20 mph. 
Mixing Height.......2500 ft AGL until 1100, then 6000 ft AGL. 
Transport Winds.....Southwest 5 mph. 
Smoke dispersal.....Poor until 0900. Fair after 1200. 

.THURSDAY NIGHT...
Sky/weather.........Mostly cloudy (70-80%) until 2400, then partly 
                    cloudy (50-60%). Numerous showers and scattered 
                    thunderstorms until 2400, then scattered 
                    showers and isolated thunderstorms. 
Chc of lightning....50 percent. 
Min temperature.....47-57 F. 
Max humidity........77-92%. 
20-foot winds.......Downslope/downvalley winds 3 to 6 mph. 
                    Localized gusts up to 20 mph in the evening. 
CWR.................50 percent. 
15K Ft MSL Winds....Southwest 15 to 20 mph. 
Mixing Height.......4500 ft AGL until 2000, then 500 ft AGL. 
Transport Winds.....Southwest 5 mph. 
Smoke dispersal.....Poor. 

.FRIDAY...
Sky/weather.........Partly cloudy (40-50%) until 1200, then mostly 
                    cloudy (70-80%). Scattered showers and isolated 
                    thunderstorms until 1200, then numerous showers 
                    and scattered thunderstorms. 
Chc of lightning....50 percent. 
Max temperature.....70-80 F. 
Min humidity........34-44%. 
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 15 to 20 mph. 
Mixing Height.......3000 ft AGL until 1100, then 5500 ft AGL. 
Transport Winds.....Southwest 5 mph. 
Smoke dispersal.....Poor until 0900. Fair after 1200. 

.FORECAST FOR DAY 3 THROUGH 7...
.SATURDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 45-55. Highs 69-79. Winds less than 15 mph. 
.SUNDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 45-55. Highs 70-80. Winds less than 15 mph. 
.MONDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 45-55. Highs 71-81. Winds less than 15 mph. 
.TUESDAY...Partly cloudy. Isolated showers and thunderstorms.
Lows 46-56. Highs 73-83. 
.WEDNESDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 47-57. Highs 75-85.