COZ205-191045-
COZ205-191045-
Colorado River Headwaters-
1234 PM MDT Tue Aug 18 2026

Fire Weather Planning Forecast for Wrn Colorado and Ern Utah
National Weather Service Grand Junction CO
1234 PM MDT Tue Aug 18 2026

.DISCUSSION...

Breezy winds are possible Tuesday and Wednesday, particularly 
across northwestern Colorado valleys and near the Four Corners. 
There remains enough moisture region-wide to limit critical fire 
weather conditions, though Red Flag criteria may be met briefly in
localized areas of valleys Tuesday. Isolated showers and 
thunderstorms through Friday are not expected to bring much 
wetting rain, but look for more widespread rainfall to return over 
the weekend.

...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%). Isolated thunderstorms 
                    until 2400. Isolated showers. 
Chc of lightning....20 percent. 
Min temperature.....51-61 F. 
Max humidity........57-67%. 
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 20 to 25 mph. 
Mixing Height.......8500 ft AGL until 2000, then 500 ft AGL. 
Transport Winds.....Northwest 5 to 10 mph until 2400, then east. 
Smoke dispersal.....Good until 2100, then poor. 

.WEDNESDAY...
Sky/weather.........Mostly sunny (20-30%) until 1200, then partly 
                    cloudy (40-50%). Isolated showers. Isolated 
                    thunderstorms after 1200. 
Chc of lightning....20 percent. 
Max temperature.....77-87 F. 
Min humidity........17-27%. 
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....Northwest 20 to 30 mph decreasing to 15 to 20 
                    mph in the afternoon. 
Mixing Height.......2000 ft AGL until 1000, then 9500 ft AGL. 
Transport Winds.....West 5 mph until 1200, then 10 to 15 mph. 
Smoke dispersal.....Poor until 0900. Very good after 1200. 

.WEDNESDAY NIGHT...
Sky/weather.........Partly cloudy (30-40%). Isolated showers and 
                    thunderstorms until 2400. 
Chc of lightning....20 percent. 
Min temperature.....53-63 F. 
Max humidity........51-61%. 
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....Northwest 15 to 20 mph. 
Mixing Height.......6000 ft AGL until 2000, then 500 ft AGL. 
Transport Winds.....Northwest 5 to 10 mph until 2400, then 
                    southeast. 
Smoke dispersal.....Poor. 

.THURSDAY...
Sky/weather.........Mostly sunny (20-30%) until 1200, then partly 
                    cloudy (30-40%). Isolated showers and 
                    thunderstorms after 1200. 
Chc of lightning....10 percent. 
Max temperature.....79-89 F. 
Min humidity........14-24%. 
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....Northwest 15 to 20 mph decreasing to 10 to 15 
                    mph in the afternoon. 
Mixing Height.......2500 ft AGL until 1000, then 9500 ft AGL. 
Transport Winds.....Northwest 5 mph. 
Smoke dispersal.....Poor until 0900. Good after 1200. 

.FORECAST FOR DAY 3 THROUGH 7...
.FRIDAY...Mostly clear. Isolated showers and thunderstorms. Lows
50-60. Highs 79-89. Winds less than 15 mph. 
.SATURDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 51-61. Highs 76-86. Winds less than 15 mph. 
.SUNDAY...Mostly cloudy. Scattered showers and thunderstorms.
Lows 49-59. Highs 73-83. Winds less than 15 mph. 
.MONDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 48-58. Highs 73-83. 
.TUESDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 47-57. Highs 73-83.