
Heavy rainfall capable of causing flash flooding will continue to impact Hawaii through Monday. Severe thunderstorms and heavy rain are possible in parts of Texas and the southern Plains and the Upper Great Lakes. Heavy mountain snow continues in California's Sierra Nevada and rain with gusty winds to lower elevations. Super Typhoon Sinlaku will impact the Marianas through midweek. Read More >
COZ205-131000-
COZ205-131000-
Colorado River Headwaters-
1150 AM MDT Sun Apr 12 2026
Fire Weather Planning Forecast for Wrn Colorado and Ern Utah
National Weather Service Grand Junction CO
1150 AM MDT Sun Apr 12 2026
.DISCUSSION...
Localized red flag conditions are expected to occur primarily
across the lower Yampa River Basin today. Gusts could reach 50 mph
this afternoon, and minimum RH will be below 20% for the majority
of northwestern Colorado. Some isolated thunderstorms could
develop over these same areas, as well as along the high terrain.
Colder, wetter conditions settle in Monday behind a cold front,
effectively halting any localized red flag potential.
...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 (50-60%). Scattered showers until
2400, isolated showers after 2400.
Chc of lightning....0 percent.
Min temperature.....27-37 F.
Max humidity........50-60%.
20-foot winds.......Southwest winds 15 to 20 mph. Localized gusts
up to 45 mph decreasing to 35 mph after
midnight.
CWR.................20 percent.
15K Ft MSL Winds....Southwest 40 to 50 mph.
Mixing Height.......10500 ft AGL until 2000, then 2500 ft AGL.
Transport Winds.....Southwest 10 to 15 mph.
Smoke dispersal.....Excellent until 2100, then poor.
.MONDAY...
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.....47-57 F.
Min humidity........24-34%.
20-foot winds.......Southwest winds 15 to 20 mph with gusts to 40
mph.
CWR.................20 percent.
15K Ft MSL Winds....Southwest 35 to 45 mph decreasing to 30 to 40
mph in the afternoon.
Mixing Height.......3500 ft AGL until 0900, then 10500 ft AGL.
Transport Winds.....Southwest 20 to 25 mph.
Smoke dispersal.....Poor until 0900. Excellent after 1200.
.MONDAY NIGHT...
Sky/weather.........Partly cloudy (50-60%) until 2400, then mostly
cloudy (70-80%). Scattered showers until 2400.
Isolated thunderstorms. Numerous showers after
2400.
Chc of lightning....20 percent.
Min temperature.....24-34 F.
Max humidity........73-88%.
20-foot winds.......Downslope/downvalley winds 3 to 6 mph.
Localized gusts up to 35 mph in the evening.
CWR.................60 percent.
15K Ft MSL Winds....Southwest 30 to 40 mph decreasing to 20 to 30
mph after midnight.
Mixing Height.......8500 ft AGL until 2000. 2500 ft AGL after 2100.
Transport Winds.....Southwest 5 to 10 mph.
Smoke dispersal.....Good until 2100, then poor.
.TUESDAY...
Sky/weather.........Cloudy (80-90%). Isolated thunderstorms until
1200. Snow showers. Scattered thunderstorms
after 1200.
Chc of lightning....50 percent.
Max temperature.....43-53 F.
Min humidity........42-52%.
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming
upslope/upvalley 4 to 8 mph by 1100.
CWR.................70 percent.
15K Ft MSL Winds....Southwest 20 to 25 mph.
Mixing Height.......6500 ft AGL.
Transport Winds.....Southwest 5 to 10 mph until 1200, then 15 to 20
mph.
Smoke dispersal.....Poor until 0900. Good after 1200.
.FORECAST FOR DAY 3 THROUGH 7...
.WEDNESDAY...Mostly cloudy. Scattered snow showers and isolated
thunderstorms. Lows 23-33. Highs 44-54. West winds 10 to 20 mph
with gusts to 35 mph.
.THURSDAY...Breezy. Mostly clear. Lows 26-36. Highs 49-59.
Southwest winds 15 to 25 mph with gusts to 50 mph.
.FRIDAY...Mostly cloudy. Scattered showers and isolated
thunderstorms. Lows 26-36. Highs 42-52. Southwest winds 10 to
20 mph with gusts to 45 mph.
.SATURDAY...Partly cloudy. Scattered showers and isolated
thunderstorms. Lows 17-27. Highs 38-48.
.SUNDAY...Mostly clear. Lows 17-27. Highs 48-58.