National Weather Service United States Department of Commerce

Thunderstorms Across the Central Plains and Mid South

Severe thunderstorms will be possible over parts of the Great Plains today through Wednesday which could bring large hail, damaging winds, and possible tornadoes. Slight Risks (level 2 of 5) of severe thunderstorms has been outlooked. Read More >

COZ205-012315-
COZ205-012315-
Colorado River Headwaters-
113 AM MDT Mon Jun 1 2026

Fire Weather Planning Forecast for Wrn Colorado and Ern Utah
National Weather Service Grand Junction CO
113 AM MDT Mon Jun 1 2026

.DISCUSSION...Temperatures will continue to warm to above normal
through early week and remain there. This will allow for lower
afternoon humidity and deeper mixing and some gusty afternoon
winds leading to localized critical fire weather conditions 
each day. A moisture push by midweek look to lead to daily 
afternoon thunderstorms over the high divide mountains of 
Colorado through the end of the week. Lightning and gusty
outflow winds will be daily threats. 

...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 (20-30%). Isolated showers and 
                    thunderstorms after 1200. 
Chc of lightning....10 percent. 
Max temperature.....70-80 F. 
Min humidity........12-17%. 
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. 
Mixing Height.......1000 ft AGL until 0900, then 12500 ft AGL. 
Transport Winds.....South 5 to 10 mph until 1200, then southwest 15 
                    to 20 mph. 
Smoke dispersal.....Poor until 0900. Excellent after 1200. 

.TONIGHT...
Sky/weather.........Partly cloudy (30-40%). 
Chc of lightning....0 percent. 
Min temperature.....42-52 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....Southwest 15 to 20 mph. 
Mixing Height.......9500 ft AGL until 2000, then 1000 ft AGL. 
Transport Winds.....West 5 to 10 mph until 2400, then southeast. 
Smoke dispersal.....Good until 2100, then poor. 

.TUESDAY...
Sky/weather.........Mostly sunny (20-30%) until 1200, then partly 
                    cloudy (50-60%). 
Chc of lightning....0 percent. 
Max temperature.....73-83 F. 
Min humidity........11-16%. 
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 15 to 20 mph. 
Mixing Height.......1000 ft AGL until 0900. 13000 ft AGL after 
                    1100. 
Transport Winds.....South 5 to 10 mph until 1200, then southwest 15 
                    to 20 mph. 
Smoke dispersal.....Poor until 0900. Excellent after 1200. 

.FORECAST FOR DAY 3 THROUGH 7...
.WEDNESDAY...Partly cloudy. Isolated showers and thunderstorms.
Lows 41-51. Highs 71-81. Winds less than 15 mph. 
.THURSDAY...Partly cloudy. Isolated showers and thunderstorms.
Lows 41-51. Highs 72-82. Winds less than 15 mph. 
.FRIDAY...Mostly clear. Isolated showers and thunderstorms. Lows
42-52. Highs 73-83. Winds less than 15 mph. 
.SATURDAY...Mostly clear. Isolated showers and thunderstorms.
Lows 42-52. Highs 75-85. 
.SUNDAY...Mostly clear. Isolated showers and thunderstorms. Lows
43-53. Highs 73-83.