Colorado River Headwaters (COZ205) - Fire Weather Forecast

Severe Weather and Heavy Rainfall from the Midwest to the Ohio Valley; Mid-Summer Heat Continues

Severe thunderstorm and heavy rainfall threats will persist from the Midwest to Lower Great Lakes through Monday, shifting into the Ohio Valley and Central Appalachians Monday evening into Tuesday. Mid-summer heat will continue across much of the CONUS this week, with record highs possible well into the 100s across the south-central High Plains. Read More >

COZ205-102315- COZ205-102315- Colorado River Headwaters- 106 AM MDT Mon Aug 10 2026 Fire Weather Planning Forecast for Wrn Colorado and Ern Utah National Weather Service Grand Junction CO 106 AM MDT Mon Aug 10 2026 .DISCUSSION...Temperatures will slowly trend downward and moisture trend upward through this week. Highs today remain above normal with another round of thunderstorms initiating on the terrain and drifting to adjacent valleys. The shower and thunderstorm activity will increase each day before peaking around Thursday when highs should settle back to near or below normal. Gusty winds will be a threat today with heavy rainfall rates impacting recent burn scars by mid week. ...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.........Partly cloudy (40-50%). Scattered showers and thunderstorms after 1200. Chc of lightning....30 percent. Max temperature.....78-88 F. Min humidity........17-27%. 20-foot winds.......Downslope/downvalley 3 to 6 mph becoming upslope/upvalley 4 to 8 mph by 1100. CWR.................20 percent. 15K Ft MSL Winds....West 10 to 15 mph. Mixing Height.......1000 ft AGL until 0900. 9500 ft AGL after 1000. Transport Winds.....West 5 mph. Smoke dispersal.....Poor until 0900. Good after 1200. .TONIGHT... Sky/weather.........Partly cloudy (40-50%). Scattered showers and thunderstorms until 2400. Chc of lightning....30 percent. Min temperature.....53-63 F. Max humidity........57-67%. 20-foot winds.......Upslope/upvalley 4 to 8 mph becoming downslope/downvalley 3 to 6 mph by sunset. CWR.................10 percent. 15K Ft MSL Winds....Northwest 10 to 15 mph. Mixing Height.......8000 ft AGL until 1900. 500 ft AGL after 2000. Transport Winds.....Northwest 5 to 10 mph until 2400, then south. Smoke dispersal.....Poor. .TUESDAY... Sky/weather.........Mostly sunny (20-30%) until 1200, then partly cloudy (40-50%). Scattered showers and thunderstorms after 1200. Chc of lightning....20 percent. Max temperature.....78-88 F. Min humidity........17-27%. 20-foot winds.......Downslope/downvalley 3 to 6 mph becoming upslope/upvalley 4 to 8 mph by 1100. CWR.................20 percent. 15K Ft MSL Winds....Northwest 10 to 15 mph. Mixing Height.......2000 ft AGL until 1000, then 10000 ft AGL. Transport Winds.....Northwest 5 mph. Smoke dispersal.....Poor until 0900. Good after 1200. .FORECAST FOR DAY 3 THROUGH 7... .WEDNESDAY...Partly cloudy. Showers with numerous thunderstorms. Lows 50-60. Highs 74-84. Winds less than 15 mph. .THURSDAY...Showers with numerous thunderstorms. Lows 47-57. Highs 68-78. Winds less than 15 mph. .FRIDAY...Mostly cloudy. Numerous showers and thunderstorms. Lows 45-55. Highs 67-77. Winds less than 15 mph. .SATURDAY...Partly cloudy. Scattered showers and thunderstorms. Lows 45-55. Highs 70-80. .SUNDAY...Partly cloudy. Scattered showers and thunderstorms. Lows 45-55. Highs 70-80.