
A Nor'easter will create hazardous marine and coastal conditions along the Mid-Atlantic coast through mid-week, with significant coastal flooding and beach erosion possible. Meanwhile, another strong storm system is forecast to bring high winds and heavy precipitation to portions of southern Alaska. Elsewhere, relatively benign weather is expected through the first half of the work week. Read More >
COZ205-191200-
COZ205-191200-
Colorado River Headwaters-
159 PM MDT Sun Oct 18 2026
Fire Weather Planning Forecast for Wrn Colorado and Ern Utah
National Weather Service Grand Junction CO
159 PM MDT Sun Oct 18 2026
.DISCUSSION...Critical fire weather conditions are not forecasted
this week. Moisture and rainfall chances will increase throughout
the week, with widespread wetting rains and higher elevation snow
(12,000+ ft) likely Wednesday - Friday. Showers could become
stronger late week, increasing the chance for localized
flooding/flash flooding.
...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 (60-70%) until 2400, then partly
cloudy (50-60%). Isolated showers.
Chc of lightning....0 percent.
Min temperature.....32-42 F.
Max humidity........61-76%.
Snow Level..........Near 10000 ft.
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....South 15 to 20 mph increasing to southwest 20
to 25 mph after midnight.
Mixing Height.......1000 ft AGL.
Transport Winds.....Southwest 5 mph.
Smoke dispersal.....Poor.
.MONDAY...
Sky/weather.........Partly cloudy (40-50%). Isolated showers.
Isolated thunderstorms after 1200.
Chc of lightning....20 percent.
Max temperature.....55-65 F.
Min humidity........37-47%.
Snow Level..........Near 10700 ft.
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....Southwest 15 to 20 mph.
Mixing Height.......1500 ft AGL until 1100, then 5000 ft AGL.
Transport Winds.....Southwest 5 mph.
Smoke dispersal.....Poor.
.MONDAY NIGHT...
Sky/weather.........Partly cloudy (40-50%). Isolated showers until
2400, scattered showers after 2400.
Chc of lightning....0 percent.
Min temperature.....33-43 F.
Max humidity........78-93%.
Snow Level..........Near 11300 ft.
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 15 to 20 mph.
Mixing Height.......1000 ft AGL.
Transport Winds.....South 5 mph.
Smoke dispersal.....Poor.
.TUESDAY...
Sky/weather.........Partly cloudy (30-40%). Isolated showers.
Chc of lightning....0 percent.
Max temperature.....55-65 F.
Min humidity........40-50%.
Snow Level..........Near 11100 ft.
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....Southwest 15 to 20 mph.
Mixing Height.......1500 ft AGL until 1100, then 5500 ft AGL until
1700, then 2500 ft AGL.
Transport Winds.....South 5 mph until 1200, then southwest.
Smoke dispersal.....Poor until 1200, then fair until 1500, then
poor.
.FORECAST FOR DAY 3 THROUGH 7...
.WEDNESDAY...Partly cloudy. Scattered showers and isolated
thunderstorms. Lows 36-46. Highs 56-66. Winds less than 15 mph.
.THURSDAY...Showers and isolated thunderstorms. Lows 39-49. Highs
52-62. Winds less than 15 mph.
.FRIDAY...Showers and isolated thunderstorms. Lows 36-46. Highs
45-55. Winds less than 15 mph.
.SATURDAY...Partly cloudy. Numerous showers and isolated
thunderstorms. Lows 29-39. Highs 44-54.
.SUNDAY...Mostly clear. Isolated showers. Lows 28-38. Highs
51-61.