COZ203-182315-
COZ203-182315-
Lower Colorado River-
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.........Partly cloudy (50-60%). Isolated thunderstorms 
                    until 1200. Scattered showers. Scattered 
                    thunderstorms after 1200. 
Chc of lightning....40 percent. 
Max temperature.....68-78 F near 6000 feet 
                    61-71 F near 8000 feet. 
Min humidity........40-50%. 
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming 
                    upslope/upvalley 4 to 8 mph by 1100.
CWR.................50 percent. 
15K Ft MSL Winds....Southwest 20 to 25 mph. 
Mixing Height.......5000 ft AGL. 
Transport Winds.....Southeast 5 mph until 1200, then south. 
Smoke dispersal.....Poor. 

.TONIGHT...
Sky/weather.........Partly cloudy (50-60%). Scattered showers and 
                    thunderstorms until 2400, then numerous showers 
                    and isolated thunderstorms. 
Chc of lightning....50 percent. 
Min temperature.....49-59 F near 6000 feet 
                    41-51 F near 8000 feet. 
Max humidity........76-91%. 
20-foot winds.......Downslope/downvalley winds 3 to 6 mph. 
                    Localized gusts up to 20 mph in the evening. 
CWR.................70 percent. 
15K Ft MSL Winds....Southwest 20 to 30 mph. 
Mixing Height.......3500 ft AGL until 1900, then 1000 ft AGL. 
Transport Winds.....East 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....40 percent. 
Max temperature.....65-75 F near 6000 feet 
                    56-66 F near 8000 feet. 
Min humidity........38-48%. 
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming 
                    upslope/upvalley 4 to 8 mph by 1100.
CWR.................50 percent. 
15K Ft MSL Winds....Southwest 20 to 30 mph. 
Mixing Height.......3000 ft AGL until 1200, then 7000 ft AGL. 
Transport Winds.....Southeast 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 45-55. Highs 67-77. Winds less than 15 mph. 
.MONDAY...Mostly clear. Lows 44-54. Highs 71-81. Winds less than
15 mph. 
.TUESDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 47-57. Highs 69-79. Winds less than 15 mph. 
.WEDNESDAY...Partly cloudy. Scattered showers and isolated
thunderstorms. Lows 46-56. Highs 69-79. 
.THURSDAY...Mostly clear. Isolated showers and thunderstorms.
Lows 47-57. Highs 72-82.