Colorado River Headwaters (COZ205) - Fire Weather Forecast

Hurricane Lowell to Impact Kauai; Heat Continues in the South-Central U.S.

Hurricane Lowell is forecast to pass west of Kauai today. Impacts such as high surf and heavy rain could impact all of the islands. A Hurricane Warning is in effect for Kauai, Niihau and the surrounding coastal waters. Sweltering heat remains across the South-Central Plains and Lower/Middle Mississippi Valley, as well as in the Southwest this week with limited nighttime relief. Read More >

COZ205-091045- COZ205-091045- Colorado River Headwaters- 1238 PM MDT Tue Sep 8 2026 Fire Weather Planning Forecast for Wrn Colorado and Ern Utah National Weather Service Grand Junction CO 1238 PM MDT Tue Sep 8 2026 .DISCUSSION... Drier air moves in today, and will remain in place through at least Thursday. Below threshold relative humidity values are forecast during the afternoon and evening, particularly tomorrow and Thursday. Afternoon wind gusts look to be marginal at most, but localized critical fire weather conditions are expected to occur in the Four Corners region and along some areas of the Divide. Moisture looks to increase late in the week. ...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 clear (10-20%). Chc of lightning....0 percent. Min temperature.....45-55 F. Max humidity........43-53%. 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....West 15 to 20 mph. Mixing Height.......8000 ft AGL until 1900. 500 ft AGL after 2000. Transport Winds.....West 5 to 10 mph until 2400, then north. Smoke dispersal.....Poor. .WEDNESDAY... Sky/weather.........Mostly sunny (20-30%). Chc of lightning....0 percent. Max temperature.....73-83 F. Min humidity........9-14%. 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....West 15 to 20 mph. Mixing Height.......1000 ft AGL until 1000, then 9500 ft AGL. Transport Winds.....Northeast 5 mph until 1200, then west 10 to 15 mph. Smoke dispersal.....Poor until 0900. Good after 1200. .WEDNESDAY NIGHT... Sky/weather.........Partly cloudy (30-40%). Chc of lightning....0 percent. Min temperature.....44-54 F. Max humidity........29-39%. 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....West 10 to 15 mph. Mixing Height.......7500 ft AGL until 1900. 500 ft AGL after 2000. Transport Winds.....Northwest 5 to 10 mph until 2400, then east. Smoke dispersal.....Poor. .THURSDAY... Sky/weather.........Mostly sunny (20-30%). Chc of lightning....0 percent. Max temperature.....73-83 F. Min humidity........7-12%. 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....West 10 to 15 mph. Mixing Height.......1500 ft AGL until 1000. 10000 ft AGL after 1100. Transport Winds.....Southwest 5 mph until 1200, then west 10 to 15 mph. Smoke dispersal.....Poor until 0900. Very good after 1200. .FORECAST FOR DAY 3 THROUGH 7... .FRIDAY...Mostly clear. Isolated showers and thunderstorms. Lows 44-54. Highs 72-82. West winds 10 to 20 mph with gusts to 35 mph. .SATURDAY...Partly cloudy. Scattered showers and thunderstorms. Lows 45-55. Highs 70-80. Southwest winds 10 to 20 mph with gusts to 30 mph. .SUNDAY...Partly cloudy. Scattered showers and thunderstorms. Lows 46-56. Highs 67-77. Southwest winds 10 to 20 mph with gusts to 40 mph. .MONDAY...Partly cloudy. Scattered showers and isolated thunderstorms. Lows 41-51. Highs 64-74. .TUESDAY...Partly cloudy. Scattered showers and isolated thunderstorms. Lows 41-51. Highs 66-76.