National Weather Service United States Department of Commerce

High Pressure and Near Seasonal Temperatures Persist This Week

A warming trend continues under building high pressure. Weak disturbance moves through Thursday. Cooler this weekend as trough moves through Friday evening through Saturday, bringing showers to northern mountains. Plus, winter weather preparedness tips! Read More >

COZ293-191145-
Gunnison Basin Forecast Area-
143 PM MDT Wed Oct 18 2017

.DISCUSSION...
Mid and high level clouds will increase this evening ahead of a 
weak disturbance. This wave will quickly move across the southern 
half of the area on Thursday which will bring scattered showers 
to the San Juans. Southwesterly flow will increase Friday as the 
next Pacific trough moves into the Great Basin. This storm will 
bring scattered to numerous showers, mainly to the northern and 
central mountains, Friday night through early Saturday. High 
pressure, dry conditions and moderate northwest winds aloft will 
take over Sunday through 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.........Partly cloudy (30-40%). 
Min temperature.....28-38 F. 
Max humidity........48-58%. 
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming 
                    downslope/downvalley 3 to 6 mph by sunset.
CWR.................0 percent. 
LAL.................1.
Haines Index........5 moderate. 
15K Ft MSL Winds....Southwest 10 to 15 mph, increasing to 15 to 20 
                    mph after midnight. 
Mixing Height.......2000 ft AGL. 
Transport Winds.....Southeast 5 mph. 
Smoke dispersal.....Poor. 

.THURSDAY...
Sky/weather.........Partly cloudy (40-50%). Isolated showers and 
                    thunderstorms after 1200. 
Max temperature.....52-62 F. 
Min humidity........21-31%. 
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming 
                    upslope/upvalley 4 to 8 mph by 1100.
CWR.................0 percent. 
LAL.................1 until 1200, then 2.
Haines Index........4 low. 
15K Ft MSL Winds....Southwest 15 to 20 mph. 
Mixing Height.......1500 ft AGL until 1000. 8000 ft AGL after 1100. 
Transport Winds.....Southeast 5 mph until 1200, then southwest. 
Smoke dispersal.....Poor until 0900. Good after 1200. 

.THURSDAY NIGHT...
Sky/weather.........Partly cloudy (40-50%). 
Min temperature.....33-43 F. 
Max humidity........70-85%. 
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming 
                    downslope/downvalley 3 to 6 mph by sunset.
CWR.................0 percent. 
LAL.................1.
Haines Index........4 low. 
15K Ft MSL Winds....Southwest 10 to 15 mph, increasing to 15 to 20 
                    mph after midnight. 
Mixing Height.......4500 ft AGL until 2100, then 2000 ft AGL. 
Transport Winds.....Southwest 5 to 10 mph until 2400, then 
                    southeast. 
Smoke dispersal.....Poor. 

.FRIDAY...
Sky/weather.........Partly cloudy (40-50%). 
Max temperature.....55-65 F. 
Min humidity........21-31%. 
20-foot winds.......Downslope/downvalley winds 4 to 8 mph, becoming 
                    southwest 10 to 15 mph in the afternoon. 
                    Localized gusts up to 35 mph. 
CWR.................0 percent. 
LAL.................1.
Haines Index........3 very low. 
15K Ft MSL Winds....West 25 to 35 mph, increasing to southwest 30 
                    to 40 mph in the afternoon. 
Mixing Height.......2000 ft AGL until 1000, then 8000 ft AGL. 
Transport Winds.....South 5 to 10 mph until 1200, then southwest 20 
                    to 30 mph. 
Smoke dispersal.....Poor until 0900. Excellent after 1200. 

.FORECAST FOR DAY 3 THROUGH 7...
.SATURDAY...Partly cloudy. Scattered showers. Lows 25-35. Highs
45-55. Winds less than 15 mph. 
.SUNDAY...Mostly clear. Lows 19-29. Highs 49-59. Winds less than
15 mph. 
.MONDAY...Mostly clear. Lows 25-35. Highs 54-64. Winds less than
15 mph. 
.TUESDAY...Mostly clear. Lows 25-35. Highs 55-65. 
.WEDNESDAY...Clear. Lows 24-34. Highs 55-65. 

$$