Colorado River Headwaters (COZ205) - Fire Weather Forecast

Lowell to Impact Hawaii; Heat Persists in the South-Central U.S.

Hurricane Lowell is forecast to pass west of Kauai`s coastal waters tonight. Impacts such as high surf and heavy rain could impact all of the islands. Sweltering heat remains across the South-Central Plains and Lower/Middle Mississippi Valley into this week with limited nighttime relief. Periods of moderate to heavy rainfall will be possible through Tuesday morning in the northern Rockies. Read More >

COZ205-080945- COZ205-080945- Colorado River Headwaters- 1143 AM MDT Mon Sep 7 2026 Fire Weather Planning Forecast for Wrn Colorado and Ern Utah National Weather Service Grand Junction CO 1143 AM MDT Mon Sep 7 2026 .DISCUSSION... Some isolated showers, maybe a few storms, will be possible over the San Juans and Continental Divide over the coming days. Drier air will continue to move in as temperatures creep up to anywhere from 5 to 10 degrees above more seasonal values. Very spotty critical fire weather conditions show up Wednesday onwards but coverage is minimal. ...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 (50-60%). Isolated showers. Isolated thunderstorms after 1200. Chc of lightning....10 percent. Max temperature.....69-79 F. Min humidity........30-40%. 20-foot winds.......Downslope/downvalley winds 4 to 8 mph becoming west 10 to 15 mph with gusts to 30 mph in the afternoon. CWR.................10 percent. 15K Ft MSL Winds....Southwest 30 to 40 mph. Mixing Height.......1000 ft AGL until 0900, then 8000 ft AGL. Transport Winds.....Southwest 5 to 10 mph until 1200, then 15 to 20 mph. Smoke dispersal.....Poor until 0900. Very good after 1200. .TONIGHT... Sky/weather.........Partly cloudy (50-60%). Chc of lightning....0 percent. Min temperature.....47-57 F. Max humidity........57-72%. 20-foot winds.......Upslope/upvalley 4 to 8 mph becoming downslope/downvalley 3 to 6 mph by sunset. CWR.................0 percent. 15K Ft MSL Winds....Southwest 20 to 30 mph. Mixing Height.......6000 ft AGL until 1900. 500 ft AGL after 2000. Transport Winds.....Southwest 5 mph. Smoke dispersal.....Poor. .TUESDAY... Sky/weather.........Partly cloudy (30-40%). Chc of lightning....0 percent. Max temperature.....72-82 F. Min humidity........18-28%. 20-foot winds.......Upslope/upvalley winds 4 to 8 mph. Localized gusts up to 30 mph in the afternoon. CWR.................0 percent. 15K Ft MSL Winds....Southwest 25 to 35 mph decreasing to 20 to 25 mph in the afternoon. Mixing Height.......500 ft AGL until 0900. 9500 ft AGL after 1000. Transport Winds.....Southwest 5 to 10 mph until 1200, then west 15 to 20 mph. Smoke dispersal.....Poor until 0900. Very good after 1200. .FORECAST FOR DAY 3 THROUGH 7... .WEDNESDAY...Mostly clear. Lows 43-53. Highs 73-83. Winds less than 15 mph. .THURSDAY...Mostly clear. Lows 43-53. Highs 73-83. Winds less than 15 mph. .FRIDAY...Mostly clear. Isolated showers and thunderstorms. Lows 45-55. Highs 72-82. West winds 10 to 20 mph with gusts to 30 mph. .SATURDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 45-55. Highs 71-81. .SUNDAY...Partly cloudy. Scattered showers and thunderstorms. Lows 46-56. Highs 69-79.