Heavy thunderstorms will continue areas of excessive rainfall and locally considerable flooding over parts of the southern Plains into the mid-Mississippi River Valley through Friday. Heavy to excessive rainfall may bring flash and urban flooding, along with isolated riverine flooding to a part of the Upper Midwest Thursday. Read More >
COZ207-121245- COZ207-121245- Southwest Colorado Lower Forecast Area- 243 PM MDT Wed Jun 11 2025 Fire Weather Planning Forecast for Wrn Colorado and Ern Utah National Weather Service Grand Junction CO 243 PM MDT Wed Jun 11 2025 .DISCUSSION...Drier air starts moving in tomorrow causing convection to become more isolated in nature. Friday onwards, drier air and gusty winds return bringing an increase in fire weather concerns to the region through the weekend and beyond. ...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....0 percent. Min temperature.....53-63 F. Max humidity........44-54%. 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.......10000 ft AGL until 2000, then 1500 ft AGL. Transport Winds.....Northeast 5 to 10 mph until 2400, then southeast. Smoke dispersal.....Good until 2100, then poor. .THURSDAY... Sky/weather.........Mostly sunny (10-20%). Chc of lightning....0 percent. Max temperature.....80-90 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....Southwest 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Mixing Height.......2500 ft AGL until 1000. 14500 ft AGL after 1100. Transport Winds.....South 5 to 10 mph until 1200, then west 15 to 20 mph. Smoke dispersal.....Poor until 0900. Excellent after 1200. .THURSDAY NIGHT... Sky/weather.........Mostly clear (10-20%). Chc of lightning....0 percent. Min temperature.....51-61 F. Max humidity........28-38%. 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 20 to 25 mph becoming southwest 15 to 20 mph after midnight. Mixing Height.......13000 ft AGL until 2000, then 1500 ft AGL. Transport Winds.....West 5 to 10 mph. Smoke dispersal.....Very good until 2100, then poor. .FRIDAY... Sky/weather.........Sunny (0-10%). Chc of lightning....0 percent. Max temperature.....82-92 F. Min humidity........6-11%. 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....Southwest 20 to 25 mph becoming west 15 to 20 mph in the afternoon. Mixing Height.......2000 ft AGL until 0900, then 13500 ft AGL. Transport Winds.....Southwest 5 to 10 mph. Smoke dispersal.....Poor until 0900. Excellent after 1200. .FORECAST FOR DAY 3 THROUGH 7... .SATURDAY...Clear. Lows 51-61. Highs 87-97. Winds less than 15 mph. .SUNDAY...Mostly clear. Lows 52-62. Highs 89-99. Winds less than 15 mph. .MONDAY...Mostly clear. Lows 54-64. Highs 88-98. Southwest winds 10 to 20 mph with gusts to 30 mph. .TUESDAY...Mostly clear. Lows 53-63. Highs 84-94. .WEDNESDAY...Mostly clear. Lows 50-60. Highs 82-92.