Colorado River Headwaters (COZ205) - Fire Weather Forecast

COZ205-301200-
COZ205-301200-
Colorado River Headwaters-
157 PM MDT Tue Sep 29 2026

Fire Weather Planning Forecast for Wrn Colorado and Ern Utah
National Weather Service Grand Junction CO
157 PM MDT Tue Sep 29 2026

.DISCUSSION..

Rain and thunderstorms are expected to continue through Wednesday
evening, primarily south of I-70. Prolonged or heavy periods of 
rainfall could lead to flooding, especially in areas that have 
recently received substantial rain. By Thursday high pressure 
begins to move into the area, leading to drier and warmer 
conditions. However, enough moisture remains to keep critical fire
weather conditions out of the forecast. 

...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 (70-80%). Isolated thunderstorms 
                    until 2400. Isolated showers. 
Chc of lightning....10 percent. 
Min temperature.....40-50 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....East 10 to 15 mph increasing to 15 to 20 mph 
                    after midnight. 
Mixing Height.......3500 ft AGL until 1900, then 1000 ft AGL. 
Transport Winds.....Northeast 5 mph. 
Smoke dispersal.....Poor. 

.WEDNESDAY...
Sky/weather.........Cloudy (80-90%). Scattered showers until 
                    1200, numerous showers and isolated thunderstorms 
                    after 1200. 
Chc of lightning....20 percent. 
Max temperature.....54-64 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.................80 percent. 
15K Ft MSL Winds....Northeast 15 to 20 mph increasing to 20 to 25 
                    mph in the afternoon. 
Mixing Height.......4500 ft AGL. 
Transport Winds.....Northeast 5 to 10 mph. 
Smoke dispersal.....Poor until 0900. Fair after 1200. 

.WEDNESDAY NIGHT...
Sky/weather.........Mostly cloudy (70-80%) until 2400, then partly 
                    cloudy (50-60%). Scattered showers and isolated 
                    thunderstorms until 2400. 
Chc of lightning....20 percent. 
Min temperature.....36-46 F. 
Max humidity........72-87%. 
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....Northeast 25 to 35 mph. 
Mixing Height.......1000 ft AGL. 
Transport Winds.....Northeast 5 mph. 
Smoke dispersal.....Poor. 

.THURSDAY...
Sky/weather.........Partly cloudy (40-50%) until 1200, then mostly 
                    sunny (10-20%). 
Chc of lightning....0 percent. 
Max temperature.....61-71 F. 
Min humidity........26-36%. 
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....North 20 to 25 mph decreasing to 15 to 20 mph 
                    in the afternoon. 
Mixing Height.......3000 ft AGL until 1200, then 5000 ft AGL. 
Transport Winds.....East 5 mph until 1200, then north. 
Smoke dispersal.....Poor until 0900. Fair after 1200. 

.FORECAST FOR DAY 3 THROUGH 7...
.FRIDAY...Clear. Lows 37-47. Highs 65-75. Winds less than 15 mph.
.SATURDAY...Mostly clear. Lows 39-49. Highs 65-75. Winds less
than 15 mph. 
.SUNDAY...Mostly clear. Lows 39-49. Highs 65-75. Winds less than
15 mph. 
.MONDAY...Mostly clear. Isolated showers and thunderstorms. Lows
40-50. Highs 62-72. 
.TUESDAY...Partly cloudy. Isolated showers and thunderstorms.
Lows 39-49. Highs 60-70.