National Weather Service United States Department of Commerce

Heat Wave Persists Over the Central U.S.; Significant Flooding Expected in the Northern Mid-Atlantic Tuesday

Dangerous and extreme heat will remain across portions of the Central U.S. this week, persisting across the Mid to Lower Mississippi Valleys, Gulf Coast, Southern Plains and portions of Texas. A heat wave over the Southwest will intensify late this week. Severe thunderstorms and flash flooding will spread from the Great Lakes/Ohio Valley to the Mid-Atlantic and Northeast the next few days. Read More >

COZ205-281230-
COZ205-281230-
Colorado River Headwaters-
217 PM MDT Mon Jul 27 2026

Fire Weather Planning Forecast for Wrn Colorado and Ern Utah
National Weather Service Grand Junction CO
217 PM MDT Mon Jul 27 2026

.DISCUSSION... Daily showers and thunderstorms will continue 
for at least the next few days while high pressure aloft allows 
for moisture to advect into the region in southwesterly flow. 
Storms have been slow moving and capable of producing heavy 
rainfall, which increases flooding and debris flow concerns with 
burn scars. Thunderstorms have also been producing strong outflow 
winds that do not follow diurnal wind direction. Critical fire 
weather conditions remain out of the forecast while elevated 
moisture persists. 

...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 (40-50%). Scattered showers and 
                    thunderstorms until 2400. 
Chc of lightning....40 percent. 
Min temperature.....56-66 F. 
Max humidity........64-79%. 
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming 
                    downslope/downvalley 3 to 6 mph by sunset.
CWR.................20 percent. 
15K Ft MSL Winds....West 10 to 15 mph. 
Mixing Height.......5500 ft AGL until 2000, then 500 ft AGL. 
Transport Winds.....Northeast 5 mph until 2400, then east. 
Smoke dispersal.....Poor. 

.TUESDAY...
Sky/weather.........Mostly sunny (10-20%) until 1200, then partly 
                    cloudy (50-60%). Isolated showers until 1200, 
                    then scattered showers and thunderstorms. 
Chc of lightning....50 percent. 
Max temperature.....79-89 F. 
Min humidity........25-35%. 
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming 
                    upslope/upvalley 4 to 8 mph by 1100.
CWR.................30 percent. 
15K Ft MSL Winds....West 10 to 15 mph. 
Mixing Height.......2000 ft AGL until 1000, then 7500 ft AGL. 
Transport Winds.....Southwest 5 mph until 1200, then west. 
Smoke dispersal.....Poor until 0900. Fair after 1200. 

.TUESDAY NIGHT...
Sky/weather.........Partly cloudy (30-40%). Scattered showers and 
                    thunderstorms until 2400. 
Chc of lightning....30 percent. 
Min temperature.....54-64 F. 
Max humidity........66-81%. 
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 10 to 15 mph. 
Mixing Height.......6000 ft AGL until 1900. 500 ft AGL after 2000. 
Transport Winds.....Northeast 5 mph until 2400, then southeast. 
Smoke dispersal.....Poor. 

.WEDNESDAY...
Sky/weather.........Partly cloudy (30-40%) until 1200, then mostly 
                    cloudy (70-80%). Isolated showers and 
                    thunderstorms until 1200, then numerous showers 
                    and thunderstorms. 
Chc of lightning....70 percent. 
Max temperature.....78-88 F. 
Min humidity........25-35%. 
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming 
                    upslope/upvalley 4 to 8 mph by 1100.
CWR.................50 percent. 
15K Ft MSL Winds....West 10 to 15 mph. 
Mixing Height.......1500 ft AGL until 1000, then 5500 ft AGL. 
Transport Winds.....Southwest 5 mph. 
Smoke dispersal.....Poor until 0900. Fair after 1200. 

.FORECAST FOR DAY 3 THROUGH 7...
.THURSDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 50-60. Highs 78-88. Winds less than 15 mph. 
.FRIDAY...Mostly clear. Isolated showers. Lows 51-61. Highs
81-91. Winds less than 15 mph. 
.SATURDAY...Mostly clear. Lows 51-61. Highs 83-93. Winds less
than 15 mph. 
.SUNDAY...Mostly clear. Lows 51-61. Highs 83-93. 
.MONDAY...Mostly clear. Isolated showers and thunderstorms. Lows
52-62. Highs 82-92.