
Dangerous, record-breaking heat will continue across most of the central and eastern U.S through Friday then focusing on the eastern U.S. through the Independence Day weekend. Peak heat indices of up to 115 degrees are possible. Strong to severe thunderstorms will be possible from the northern Plains into the Midwest and Great Lakes regions, as well as across the southern Appalachians today. Read More >
COZ205-031115-
COZ205-031115-
Colorado River Headwaters-
113 PM MDT Thu Jul 2 2026
Fire Weather Planning Forecast for Wrn Colorado and Ern Utah
National Weather Service Grand Junction CO
113 PM MDT Thu Jul 2 2026
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING
FOR GUSTY WINDS, LOW HUMIDITY AND DRY FUELS FOR COLORADO FIRE
WEATHER ZONES 205 BELOW 8000 FEET, 207, 290, 291, 292, 293 AND
294, AS WELL AS UTAH FIRE WEATHER ZONE 491...
...RED FLAG WARNING IN EFFECT FROM NOON UNTIL 8 PM MDT FRIDAY FOR
GUSTY WINDS, LOW HUMIDITY AND DRY FUELS FOR COLORADO FIRE WEATHER
ZONES 207, 290, 291, 292, 293 AND 294...
.DISCUSSION...
Critical fire weather conditions continue Friday across much of
western CO. Winds will diminish Saturday and beyond, suppressing
critical fire weather. Temperatures will surge though and some
weak moisture could produce isolated showers and thunderstorms
Sunday, with coverage increasing Monday and Tuesday. This will
threaten new lightning starts and erratic fire behavior around
gusty outflows. Hot and dry with a threat of afternoon showers
remains in forecast through 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...
...RED FLAG WARNING IN EFFECT UNTIL 8 PM MDT THIS EVENING...
.TONIGHT...
Sky/weather.........Mostly clear (20-30%). Patchy smoke until
2400, areas of smoke after 2400.
Chc of lightning....0 percent.
Min temperature.....45-55 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....Southwest 20 to 25 mph.
Mixing Height.......13500 ft AGL until 2000, then 1000 ft AGL.
Transport Winds.....Southwest 10 to 15 mph until 2400, then south 5
mph.
Smoke dispersal.....Excellent until 2100, then poor.
.FRIDAY...
Sky/weather.........Mostly sunny (10-20%) until 1200, then partly
cloudy (30-40%). Areas of smoke until
1200, patchy smoke after 1200.
Chc of lightning....0 percent.
Max temperature.....75-85 F.
Min humidity........7-12%.
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....Southwest 15 to 20 mph.
Mixing Height.......1500 ft AGL until 0900, then 14000 ft AGL.
Transport Winds.....Southwest 5 to 10 mph until 1200, then west 15
to 20 mph.
Smoke dispersal.....Poor until 0900. Excellent after 1200.
.FRIDAY NIGHT...
Sky/weather.........Mostly clear (20-30%). Patchy smoke.
Chc of lightning....0 percent.
Min temperature.....47-57 F.
Max humidity........33-43%.
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.......12500 ft AGL until 2000, then 1000 ft AGL.
Transport Winds.....West 5 to 10 mph until 2400, then southeast.
Smoke dispersal.....Very good until 2100, then poor.
.INDEPENDENCE DAY...
Sky/weather.........Mostly sunny (20-30%). Patchy smoke until 1200.
Isolated showers and thunderstorms after 1200.
Chc of lightning....10 percent.
Max temperature.....76-86 F.
Min humidity........8-13%.
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming
upslope/upvalley 4 to 8 mph by 1100.
CWR.................10 percent.
15K Ft MSL Winds....West 10 to 15 mph.
Mixing Height.......500 ft AGL until 0800. 14000 ft AGL after 1100.
Transport Winds.....Southwest 5 mph until 1200, then west 10 to 15
mph.
Smoke dispersal.....Poor until 0900. Excellent after 1200.
.FORECAST FOR DAY 3 THROUGH 7...
.SUNDAY...Mostly clear. Isolated showers and thunderstorms. Lows
45-55. Highs 78-88. Winds less than 15 mph.
.MONDAY...Partly cloudy. Isolated showers and thunderstorms. Lows
48-58. Highs 77-87. Winds less than 15 mph.
.TUESDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 48-58. Highs 77-87. Winds less than 15 mph.
.WEDNESDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 48-58. Highs 77-87.
.THURSDAY...Partly cloudy. Isolated showers and thunderstorms.
Lows 49-59. Highs 79-89.