COZ205-181145-
COZ205-181145-
Colorado River Headwaters-
143 PM MDT Sun May 17 2026

Fire Weather Planning Forecast for Wrn Colorado and Ern Utah
National Weather Service Grand Junction CO
143 PM MDT Sun May 17 2026

.DISCUSSION... Thunderstorms are expected to continue through the 
evening. Strong outflow gusts are possible with storms. Rain and 
high elevation snow is possible tonight through tomorrow morning 
as a low pressure system moves across the region. With the 
exception of some very localized areas, critical fire weather 
conditions stay out of the forecast for at least the next few 
days. This is due to increased relative humidity values, and 
weaker afternoon wind gusts beginning Tuesday. 

...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.........Mostly cloudy (70-80%). Numerous showers until 
                    2400. Isolated thunderstorms. Scattered showers 
                    after 2400. 
Chc of lightning....20 percent. 
Min temperature.....34-44 F. 
Max humidity........73-88%. 
20-foot winds.......Downslope/downvalley winds 3 to 6 mph. 
                    Localized gusts up to 25 mph. 
CWR.................60 percent. 
15K Ft MSL Winds....Southwest 35 to 45 mph. 
Mixing Height.......6500 ft AGL until 2000, then 1000 ft AGL. 
Transport Winds.....Southwest 5 to 10 mph until 2400, then south. 
Smoke dispersal.....Poor. 

.MONDAY...
Sky/weather.........Mostly cloudy (70-80%). Showers and isolated 
                    thunderstorms until 1200, then numerous showers 
                    and scattered thunderstorms. 
Chc of lightning....50 percent. 
Max temperature.....46-56 F. 
Min humidity........46-56%. 
20-foot winds.......Downslope/downvalley winds 4 to 8 mph becoming 
                    west 10 to 15 mph in the afternoon. Localized 
                    gusts up to 30 mph. 
CWR.................80 percent. 
15K Ft MSL Winds....South 25 to 35 mph becoming southwest 20 to 25 
                    mph in the afternoon. 
Mixing Height.......1000 ft AGL until 0800, then 5500 ft AGL. 
Transport Winds.....Southwest 10 to 15 mph. 
Smoke dispersal.....Poor until 0900, then good. 

.MONDAY NIGHT...
Sky/weather.........Mostly cloudy (60-70%) until 2400, then partly 
                    cloudy (40-50%). Scattered showers and isolated 
                    thunderstorms until 2400. 
Chc of lightning....20 percent. 
Min temperature.....25-35 F. 
Max humidity........72-87%. 
20-foot winds.......Downslope/downvalley winds 3 to 6 mph. 
                    Localized gusts up to 30 mph in the evening. 
CWR.................20 percent. 
15K Ft MSL Winds....Southwest 20 to 30 mph. 
Mixing Height.......4000 ft AGL until 2000, then 1500 ft AGL. 
Transport Winds.....West 5 mph. 
Smoke dispersal.....Poor. 

.TUESDAY...
Sky/weather.........Partly cloudy (40-50%). Isolated snow showers 
                    until 1200, scattered showers and isolated 
                    thunderstorms after 1200. 
Chc of lightning....20 percent. 
Max temperature.....50-60 F. 
Min humidity........32-42%. 
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.......3000 ft AGL until 1000, then 8000 ft AGL. 
Transport Winds.....Southwest 5 mph until 1200, then 15 to 20 mph. 
Smoke dispersal.....Poor until 0900. Very good after 1200. 

.FORECAST FOR DAY 3 THROUGH 7...
.WEDNESDAY...Partly cloudy. Scattered showers and isolated
thunderstorms. Lows 26-36. Highs 53-63. Winds less than 15 mph. 
.THURSDAY...Partly cloudy. Isolated showers and thunderstorms.
Lows 28-38. Highs 57-67. Winds less than 15 mph. 
.FRIDAY...Partly cloudy. Isolated showers and thunderstorms. Lows
29-39. Highs 60-70. West winds 10 to 20 mph with gusts to 
30 mph. 
.SATURDAY...Partly cloudy. Isolated showers and thunderstorms.
Lows 33-43. Highs 65-75. 
.SUNDAY...Mostly clear. Isolated showers and thunderstorms. Lows
36-46. Highs 70-80.