Colorado River Headwaters (COZ205) - Fire Weather Forecast

Extreme Heat Lingers; Severe Thunderstorms for Portions of the Plains and Southeast; Heavy Rainfall Threats

Gusty winds and heavy rainfall may impact the Big Island of Hawaii as a nearby tropical system passes west of the islands. From the Southwest U.S., Rockies and across the Gulf Coast, heavy rainfall could lead to isolated flash flooding. Severe thunderstorms are expected for areas of the Plains, Gulf Coast and Southeast through Tuesday. Extreme heat lingers for the southern Plains and Southwest. Read More >

COZ205-250015- COZ205-250015- Colorado River Headwaters- 206 AM MDT Mon Aug 24 2026 Fire Weather Planning Forecast for Wrn Colorado and Ern Utah National Weather Service Grand Junction CO 206 AM MDT Mon Aug 24 2026 .DISCUSSION... Monsoonal moisture remains in place under high pressure for the next week with isolated to scattered afternoon and evening showers and thunderstorms mostly favoring the higher terrain. Primary threats with these storms continue to be gusty outflow winds, lightning, and heavy rainfall raising concern for flash flooding and debris flows, particularly on recent fire scars. Critical fire weather conditions may return 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... .TODAY... Sky/weather.........Mostly sunny (20-30%) until 1200, then partly cloudy (40-50%). Scattered showers and thunderstorms after 1200. Chc of lightning....30 percent. Max temperature.....76-86 F. Min humidity........21-31%. 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.......1500 ft AGL until 1000, then 8500 ft AGL. Transport Winds.....Southwest 5 mph until 1200, then northwest. Smoke dispersal.....Poor until 0900. Good after 1200. .TONIGHT... Sky/weather.........Partly cloudy (40-50%). Isolated showers and thunderstorms until 2400. Chc of lightning....20 percent. Min temperature.....49-59 F. Max humidity........57-72%. 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....West 15 to 20 mph. Mixing Height.......5500 ft AGL until 1900, then 1000 ft AGL. Transport Winds.....Southeast 5 mph. Smoke dispersal.....Poor. .TUESDAY... Sky/weather.........Partly cloudy (40-50%). Scattered showers and thunderstorms after 1200. Chc of lightning....20 percent. Max temperature.....76-86 F. Min humidity........19-29%. 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....West 10 to 15 mph. Mixing Height.......1500 ft AGL until 1000, then 8500 ft AGL. Transport Winds.....Southwest 5 mph until 1200, then northwest. Smoke dispersal.....Poor until 0900. Good after 1200. .FORECAST FOR DAY 3 THROUGH 7... .WEDNESDAY...Partly cloudy. Scattered showers and thunderstorms. Lows 47-57. Highs 74-84. Winds less than 15 mph. .THURSDAY...Partly cloudy. Scattered showers and thunderstorms. Lows 47-57. Highs 75-85. Winds less than 15 mph. .FRIDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 47-57. Highs 76-86. Winds less than 15 mph. .SATURDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 48-58. Highs 75-85. .SUNDAY...Partly cloudy. Scattered showers and thunderstorms. Lows 47-57. Highs 73-83.