Severe thunderstorms with destructive winds, very large hail, a couple tornadoes, and excessive rainfall will move across southern Oklahoma and northern Texas overnight. On Monday, scattered damaging winds, a couple tornadoes, and isolated large hail is possible across the Southeast U.S. into the Upper Ohio Valley. Excessive rainfall may bring flooding in the northern Gulf Coast and Northeast US. Read More >
COZ205-091300- COZ205-091300- Colorado River Headwaters- 255 PM MDT Sun Jun 8 2025 Fire Weather Planning Forecast for Wrn Colorado and Ern Utah National Weather Service Grand Junction CO 255 PM MDT Sun Jun 8 2025 .DISCUSSION... Temperatures will increase this week, with hot, dry, and windy conditions developing by Thursday. Afternoon showers and thunderstorms will develop on the mountains each afternoon. Some showers could produce wetting rains, as well as gusty outflows and lightning. ...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.........Partly cloudy (30-40%). Isolated showers and thunderstorms until 2400. Chc of lightning....10 percent. Min temperature.....44-54 F. Max humidity........55-70%. 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 15 to 20 mph. Mixing Height.......7000 ft AGL until 2000, then 2000 ft AGL. Transport Winds.....North 5 to 10 mph until 2400, then northeast. Smoke dispersal.....Fair until 2100, then poor. .MONDAY... Sky/weather.........Mostly sunny (20-30%). Isolated showers and thunderstorms after 1200. Chc of lightning....10 percent. Max temperature.....71-81 F. Min humidity........12-22%. 20-foot winds.......Upslope/upvalley winds 4 to 8 mph. Localized gusts up to 20 mph in the afternoon. CWR.................0 percent. 15K Ft MSL Winds....Northwest 10 to 15 mph. Mixing Height.......2500 ft AGL until 0900, then 10000 ft AGL. Transport Winds.....North 5 mph. Smoke dispersal.....Poor until 0900. Good after 1200. .MONDAY NIGHT... Sky/weather.........Mostly clear (20-30%). Chc of lightning....0 percent. Min temperature.....43-53 F. Max humidity........51-61%. 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....North 5 to 10 mph shifting to the west after midnight. Mixing Height.......8000 ft AGL until 2000. 2000 ft AGL after 2100. Transport Winds.....Northeast 5 to 10 mph until 2400, then southeast. Smoke dispersal.....Poor. .TUESDAY... Sky/weather.........Mostly sunny (10-20%) until 1200, then partly cloudy (30-40%). Isolated showers and thunderstorms after 1200. Chc of lightning....10 percent. Max temperature.....72-82 F. Min humidity........13-23%. 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....Northwest 5 to 10 mph. Mixing Height.......7000 ft AGL until 1200, then 9000 ft AGL. Transport Winds.....West 5 mph. Smoke dispersal.....Poor until 0900. Fair after 1200. .FORECAST FOR DAY 3 THROUGH 7... .WEDNESDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 42-52. Highs 72-82. Winds less than 15 mph. .THURSDAY...Partly cloudy. Isolated showers and thunderstorms. Lows 43-53. Highs 73-83. Winds less than 15 mph. .FRIDAY...Mostly clear. Lows 44-54. Highs 75-85. Southwest winds 10 to 20 mph with gusts to 30 mph. .SATURDAY...Mostly clear. Lows 44-54. Highs 76-86. .SUNDAY...Mostly clear. Lows 45-55. Highs 77-87.