COZ205-180000-
COZ205-180000-
Colorado River Headwaters-
155 AM MDT Thu Sep 17 2026

Fire Weather Planning Forecast for Wrn Colorado and Ern Utah
National Weather Service Grand Junction CO
155 AM 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...


.TODAY...
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........55-70%. 
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming 
                    upslope/upvalley 4 to 8 mph by 1100.
CWR.................90 percent. 
15K Ft MSL Winds....Southwest 20 to 30 mph decreasing to 20 to 25 
                    mph in the afternoon. 
Mixing Height.......3000 ft AGL. 
Transport Winds.....Southwest 5 mph. 
Smoke dispersal.....Poor. 

.TONIGHT...
Sky/weather.........Mostly cloudy (60-70%). Scattered showers and 
                    isolated thunderstorms. 
Chc of lightning....20 percent. 
Min temperature.....44-54 F. 
Max humidity........83-98%. 
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 10 to 15 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.....64-74 F. 
Min humidity........41-51%. 
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 15 to 20 mph. 
Mixing Height.......1000 ft AGL until 1000, then 5000 ft AGL. 
Transport Winds.....Southwest 5 mph. 
Smoke dispersal.....Poor until 0900. Fair after 1200. 

.FORECAST FOR DAY 3 THROUGH 7...
.SATURDAY...Mostly cloudy. Numerous showers and scattered
thunderstorms. Lows 40-50. Highs 61-71. Winds less than 15 mph. 
.SUNDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 36-46. Highs 59-69. Winds less than 15 mph. 
.MONDAY...Mostly clear. Lows 34-44. Highs 63-73. Winds less than
15 mph. 
.TUESDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 37-47. Highs 61-71. 
.WEDNESDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 37-47. Highs 62-72.