National Weather Service United States Department of Commerce

Extreme Heat Continues; Severe Thunderstorms into Upper Midwest; Strong Bering Sea Storm

Wildfires and poor air quality continue for the Pacific Northwest, Rockies and extended into the Plains. Severe thunderstorms possible for the northern Plains and upper Midwest on Monday along a frontal boundary. Another boundary will focus showers and thunderstorms for the eastern seaboard with localized heavy rainfall possible. For Alaska, a strong Bering Sea storm will bring winds and rainfall. Read More >

COZ205-032030-
COZ205-032030-
Colorado River Headwaters-
1027 PM MDT Sun Aug 2 2026

Fire Weather Planning Forecast for Wrn Colorado and Ern Utah...UPDATED
National Weather Service Grand Junction CO
1027 PM MDT Sun Aug 2 2026

...RED FLAG WARNING IN EFFECT FROM NOON UNTIL 8 PM MDT MONDAY FOR
GUSTY WINDS, LOW HUMIDITY AND DRY FUELS FOR COLORADO FIRE WEATHER
ZONE 207, AS WELL AS UTAH FIRE WEATHER ZONE 491... 

.DISCUSSION...Hot and dry conditions will persist through much of
the coming week. Critical fire weather conditions are expected for
valleys of southeast UT and southwest CO Monday with gusts to 35 
mph and low RH. Localized conditions possible elsewhere. Non zero
chances for isolated thunderstorms are forecast for the San Juans
over the next couple days. Wetting rains are not expected. Storm 
coverage potentially increases this coming weekend into next week.

...GUSTY ERRATIC WINDS CAN BE EXPECTED NEAR ANY SHOWERS
OR THUNDERSTORMS...
...THE SMOKE DATA IS CALCULATED FROM AN AVERAGE AT 6000 FEET MSL...


.REST OF TONIGHT...
Sky/weather.........Mostly clear (20-30%). Patchy smoke after 2400. 
Chc of lightning....0 percent. 
Min temperature.....55-65 F. 
Max humidity........31-41%. 
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.......500 ft AGL. 
Transport Winds.....Southwest 5 mph. 
Smoke dispersal.....Poor. 

.MONDAY...
Sky/weather.........Mostly sunny (20-30%) until 1200, then partly 
                    cloudy (30-40%). Patchy smoke. Isolated showers 
                    after 1200. 
Chc of lightning....0 percent. 
Max temperature.....84-94 F. 
Min humidity........10-15%. 
20-foot winds.......Downslope/downvalley winds 4 to 8 mph becoming 
                    west 10 to 15 mph with gusts to 30 mph in the 
                    afternoon. 
CWR.................0 percent. 
15K Ft MSL Winds....West 20 to 25 mph. 
Mixing Height.......1000 ft AGL until 0900. 13500 ft AGL after 
                    1000. 
Transport Winds.....Southwest 5 to 10 mph until 1200, then west 15 
                    to 20 mph. 
Smoke dispersal.....Poor until 0900. Excellent after 1200. 

.MONDAY NIGHT...
Sky/weather.........Partly cloudy (30-40%). Patchy smoke. 
Chc of lightning....0 percent. 
Min temperature.....53-63 F. 
Max humidity........40-50%. 
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.......11500 ft AGL until 2000, then 1000 ft AGL. 
Transport Winds.....Northwest 5 to 10 mph until 2400, then east. 
Smoke dispersal.....Good until 2100, then poor. 

.TUESDAY...
Sky/weather.........Partly cloudy (30-40%). Patchy smoke. Isolated 
                    showers and thunderstorms after 1200. 
Chc of lightning....10 percent. 
Max temperature.....82-92 F. 
Min humidity........9-14%. 
20-foot winds.......Downslope/downvalley winds 4 to 8 mph becoming 
                    west 10 to 15 mph with gusts to 30 mph in the 
                    afternoon. 
CWR.................0 percent. 
15K Ft MSL Winds....West 20 to 25 mph. 
Mixing Height.......2000 ft AGL until 1000. 15500 ft AGL after 
                    1100. 
Transport Winds.....Southwest 5 to 10 mph until 1200, then west 15 
                    to 20 mph. 
Smoke dispersal.....Poor until 0900. Excellent after 1200. 

.FORECAST FOR DAY 3 THROUGH 7...
.WEDNESDAY...Mostly clear. Patchy smoke. Lows 48-58. Highs 79-89.
West winds 10 to 20 mph with gusts to  35 mph. 
.THURSDAY...Clear. Lows 47-57. Highs 80-90. Winds less than
15 mph. 
.FRIDAY...Clear. Lows 48-58. Highs 82-92. Winds less than 15 mph.
.SATURDAY...Clear. Lows 51-61. Highs 83-93. 
.SUNDAY...Mostly clear. Isolated showers and thunderstorms. Lows
52-62. Highs 82-92.