COZ205-191045-
COZ205-191045-
Colorado River Headwaters-
1233 PM MDT Mon May 18 2026

Fire Weather Planning Forecast for Wrn Colorado and Ern Utah
National Weather Service Grand Junction CO
1233 PM MDT Mon May 18 2026

.DISCUSSION...Showers will continue through this evening before
tapering off as drier air returns. Temperatures remain below 
normal through midweek, warming near to above normal Thursday
onward. Light winds and moist surface level will limit fire 
weather concerns through the end of the week.

...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 
                    isolated thunderstorms until 2400. 
Chc of lightning....20 percent. 
Min temperature.....23-33 F. 
Max humidity........77-92%. 
20-foot winds.......Downslope/downvalley winds 3 to 6 mph. 
                    Localized gusts up to 30 mph in the evening. 
CWR.................10 percent. 
15K Ft MSL Winds....Southwest 20 to 30 mph. 
Mixing Height.......4500 ft AGL until 2000, then 1000 ft AGL. 
Transport Winds.....West 5 mph. 
Smoke dispersal.....Poor. 

.TUESDAY...
Sky/weather.........Mostly sunny (20-30%) until 1200, then partly 
                    cloudy (40-50%). Isolated showers and 
                    thunderstorms after 1200. 
Chc of lightning....10 percent. 
Max temperature.....51-61 F. 
Min humidity........34-44%. 
20-foot winds.......Upslope/upvalley winds 4 to 8 mph. Localized 
                    gusts up to 25 mph in the afternoon. 
CWR.................10 percent. 
15K Ft MSL Winds....Southwest 20 to 30 mph. 
Mixing Height.......1500 ft AGL until 0900, then 8000 ft AGL. 
Transport Winds.....South 5 mph until 1200, then southwest 15 to 20 
                    mph. 
Smoke dispersal.....Poor until 0900. Very good after 1200. 

.TUESDAY NIGHT...
Sky/weather.........Partly cloudy (40-50%). Isolated showers and 
                    thunderstorms until 2400, scattered showers after 
                    2400. 
Chc of lightning....10 percent. 
Min temperature.....27-37 F. 
Max humidity........78-93%. 
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....Southwest 25 to 35 mph increasing to 30 to 40 
                    mph after midnight. 
Mixing Height.......5500 ft AGL until 2000, then 1000 ft AGL. 
Transport Winds.....Northwest 5 to 10 mph until 2400, then east. 
Smoke dispersal.....Poor. 

.WEDNESDAY...
Sky/weather.........Partly cloudy (40-50%). Scattered showers until 
                    1200, then numerous showers and isolated 
                    thunderstorms. 
Chc of lightning....20 percent. 
Max temperature.....53-63 F. 
Min humidity........30-40%. 
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming 
                    upslope/upvalley 4 to 8 mph by 1100.
CWR.................20 percent. 
15K Ft MSL Winds....Southwest 25 to 35 mph decreasing to 20 to 25 
                    mph in the afternoon. 
Mixing Height.......1500 ft AGL until 0900, then 8500 ft AGL. 
Transport Winds.....Southwest 5 to 10 mph until 1200, then west 15 
                    to 20 mph. 
Smoke dispersal.....Poor until 0900. Very good after 1200. 

.FORECAST FOR DAY 3 THROUGH 7...
.THURSDAY...Partly cloudy. Isolated showers and thunderstorms.
Lows 27-37. Highs 55-65. West winds 10 to 20 mph with gusts to 
30 mph. 
.FRIDAY...Partly cloudy. Scattered showers and isolated
thunderstorms. Lows 30-40. Highs 56-66. Winds less than 15 mph. 
.SATURDAY...Partly cloudy. Isolated showers and thunderstorms.
Lows 31-41. Highs 61-71. Winds less than 15 mph. 
.SUNDAY...Mostly clear. Isolated showers and thunderstorms. Lows
34-44. Highs 67-77. 
.MEMORIAL DAY...Mostly clear. Isolated showers and thunderstorms.
Lows 37-47. Highs 70-80.