
Sweltering heat remains across the South-Central Plains, Lower/Middle Mississippi Valley, and the Southwest this week with limited nighttime relief. Thunderstorms will bring heavy rainfall leading to localized flash flooding in portions of the Desert Southwest and central Plains. Isolated strong to severe thunderstorms are possible across portions of the central Plains into the Northeast. Read More >
COZ205-092330-
COZ205-092330-
Colorado River Headwaters-
117 AM MDT Wed Sep 9 2026
Fire Weather Planning Forecast for Wrn Colorado and Ern Utah
National Weather Service Grand Junction CO
117 AM MDT Wed Sep 9 2026
.DISCUSSION...Localized critical fire weather conditions are
expected today and tomorrow due to gusty winds and low RH. While wind
gusts up to 30 mph are likely area wide this weekend, an influx
of moisture will negate the potential for widespread critical fire
weather conditions.
...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 (10-20%) until 1200, then partly
cloudy (30-40%).
Chc of lightning....0 percent.
Max temperature.....72-82 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. 9500 ft AGL after 1100.
Transport Winds.....Northeast 5 mph until 1200, then west 10 to 15
mph.
Smoke dispersal.....Poor until 0900. Good after 1200.
.TONIGHT...
Sky/weather.........Mostly clear (20-30%).
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 15 to 20 mph.
Mixing Height.......7000 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 (10-20%).
Chc of lightning....0 percent.
Max temperature.....72-82 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....West 10 to 15 mph.
Mixing Height.......1000 ft AGL until 1000, then 10500 ft AGL.
Transport Winds.....South 5 mph until 1200, then west.
Smoke dispersal.....Poor until 0900. Good after 1200.
.FORECAST FOR DAY 3 THROUGH 7...
.FRIDAY...Mostly clear. Isolated showers and thunderstorms. Lows
42-52. Highs 70-80. West winds 10 to 20 mph with gusts to
30 mph.
.SATURDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 44-54. Highs 70-80. Winds less than 15 mph.
.SUNDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 46-56. Highs 66-76. Southwest winds 10 to 20 mph with gusts
to 45 mph.
.MONDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 40-50. Highs 64-74.
.TUESDAY...Partly cloudy. Isolated showers and thunderstorms.
Lows 39-49. Highs 66-76.