Colorado River Headwaters (COZ205) - Fire Weather Forecast

Severe Weather and Heavy Rain from the Great Lakes to the Mid-Atlantic; Heat Persists in the East

Widespread strong thunderstorms with damaging winds and locally heavy rain are expected from the Upper Ohio Valley into the southern Mid-Atlantic today and portions of the central Appalachians and Carolinas on Saturday. Monsoonal moisture will bring a flash flooding threat to the Desert Southwest. Sweltering heat persists from the Plains to the southern Mid-Atlantic through tonight. Read More >

COZ205-042315- COZ205-042315- Colorado River Headwaters- 104 AM MDT Fri Sep 4 2026 Fire Weather Planning Forecast for Wrn Colorado and Ern Utah National Weather Service Grand Junction CO 104 AM MDT Fri Sep 4 2026 .DISCUSSION...Critical fire weather conditions are not forecast to develop as pulses of moisture over the next week keep humidity elevated. A moisture push today will bring showers and thunderstorm chances to the southern Colorado mountains through tomorrow. A stronger push of tropical moisture arrives Sunday and brings an uptick in thunderstorm activity to much of the area. This active pattern continues through 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... .TODAY... Sky/weather.........Mostly sunny (20-30%) until 1200, then partly cloudy (30-40%). Isolated showers and thunderstorms after 1200. Chc of lightning....10 percent. Max temperature.....71-81 F. Min humidity........24-34%. 20-foot winds.......Downslope/downvalley 3 to 6 mph becoming upslope/upvalley 4 to 8 mph by 1100. CWR.................10 percent. 15K Ft MSL Winds....Southwest 25 to 35 mph decreasing to 20 to 25 mph in the afternoon. Mixing Height.......1000 ft AGL until 0900, then 7500 ft AGL. Transport Winds.....Southwest 5 to 10 mph. Smoke dispersal.....Poor until 0900. Good after 1200. .TONIGHT... Sky/weather.........Partly cloudy (30-40%). Isolated showers and thunderstorms until 2400. Chc of lightning....10 percent. Min temperature.....45-55 F. Max humidity........59-74%. 20-foot winds.......Downslope/downvalley winds 3 to 6 mph. Localized gusts up to 20 mph in the evening. CWR.................0 percent. 15K Ft MSL Winds....South 15 to 20 mph. Mixing Height.......6000 ft AGL until 1900. 500 ft AGL after 2000. Transport Winds.....South 5 mph. Smoke dispersal.....Poor. .SATURDAY... Sky/weather.........Partly cloudy (40-50%). Isolated showers and thunderstorms after 1200. Chc of lightning....0 percent. Max temperature.....72-82 F. Min humidity........22-32%. 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....South 15 to 20 mph. Mixing Height.......2000 ft AGL until 1000, then 9000 ft AGL. Transport Winds.....Southwest 5 mph. Smoke dispersal.....Poor until 0900. Good after 1200. .FORECAST FOR DAY 3 THROUGH 7... .SUNDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 46-56. Highs 71-81. Winds less than 15 mph. .LABOR DAY...Mostly cloudy. Scattered showers and thunderstorms. Lows 48-58. Highs 66-76. Southwest winds 10 to 20 mph with gusts to 30 mph. .TUESDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 45-55. Highs 68-78. Winds less than 15 mph. .WEDNESDAY...Partly cloudy. Scattered showers and thunderstorms. Lows 46-56. Highs 71-81. .THURSDAY...Partly cloudy. Scattered showers and thunderstorms. Lows 47-57. Highs 69-79.