COZ205-182315-
COZ205-182315-
Colorado River Headwaters-
102 AM MDT Fri Sep 18 2026

Fire Weather Planning Forecast for Wrn Colorado and Ern Utah
National Weather Service Grand Junction CO
102 AM MDT Fri Sep 18 2026

.DISCUSSION...Critical fire weather conditions will continue to
be eliminated by monsoonal moisture over the region. This moisture
will once again feed showers and thunderstorms today with a 
continued threat of moderate to heavy rainfall rates. 
Precipitation trends will turn downward through the weekend into
early next week. Daily thunderstorm chances return by Tuesday and
persist thru late in 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...


.TODAY...
Sky/weather.........Mostly cloudy (60-70%). Isolated thunderstorms 
                    until 1200. Scattered showers. Scattered 
                    thunderstorms after 1200. 
Chc of lightning....40 percent. 
Max temperature.....62-72 F. 
Min humidity........41-51%. 
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming 
                    upslope/upvalley 4 to 8 mph by 1100.
CWR.................60 percent. 
15K Ft MSL Winds....Southwest 15 to 20 mph. 
Mixing Height.......4500 ft AGL. 
Transport Winds.....Southwest 5 mph. 
Smoke dispersal.....Poor. 

.TONIGHT...
Sky/weather.........Partly cloudy (50-60%). Scattered thunderstorms 
                    until 2400. Scattered showers. Isolated 
                    thunderstorms after 2400. 
Chc of lightning....30 percent. 
Min temperature.....41-51 F. 
Max humidity........81-96%. 
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming 
                    downslope/downvalley 3 to 6 mph by sunset.
CWR.................50 percent. 
15K Ft MSL Winds....Southwest 20 to 25 mph. 
Mixing Height.......1000 ft AGL. 
Transport Winds.....South 5 mph. 
Smoke dispersal.....Poor. 

.SATURDAY...
Sky/weather.........Partly cloudy (50-60%) until 1200, then mostly 
                    cloudy (70-80%). Isolated thunderstorms until 
                    1200. Scattered showers. Scattered 
                    thunderstorms after 1200. 
Chc of lightning....30 percent. 
Max temperature.....60-70 F. 
Min humidity........39-49%. 
20-foot winds.......Upslope/upvalley winds 4 to 8 mph. Localized 
                    gusts up to 25 mph in the afternoon. 
CWR.................50 percent. 
15K Ft MSL Winds....Southwest 20 to 25 mph. 
Mixing Height.......1500 ft AGL until 1000. 7000 ft AGL after 1100. 
Transport Winds.....South 5 mph until 1200, then southwest 10 to 15 
                    mph. 
Smoke dispersal.....Poor until 0900. Good after 1200. 

.FORECAST FOR DAY 3 THROUGH 7...
.SUNDAY...Partly cloudy. Scattered showers and isolated
thunderstorms. Lows 37-47. Highs 58-68. Winds less than 15 mph. 
.MONDAY...Mostly clear. Lows 35-45. Highs 62-72. Winds less than
15 mph. 
.TUESDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 38-48. Highs 62-72. Winds less than 15 mph. 
.WEDNESDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 38-48. Highs 61-71. 
.THURSDAY...Partly cloudy. Isolated showers and thunderstorms.
Lows 38-48. Highs 63-73.