National Weather Service United States Department of Commerce

Periodic high clouds and dry conditions through Wednesday afternoon. Storm to bring colder air and snow late Wednesday into Thursday.

Some high clouds will move overhead through Wednesday as they drop down from the Pacific Northwest. A storm will move through from the Pacific Northwest late Wednesday into Thursday, bringing colder air and snow to the region. Read More >

COZ291-291430-
Northern San Juan Forecast Area-
333 PM MST Tue Nov 28 2017

.DISCUSSION...

***This product sent in error. Do not use for planning
 purposes.***


...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 clear (10-20%). 
Min temperature.....22-32 F. 
Max humidity........55-65%. 
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........3 very low. 
15K Ft MSL Winds....West 15 to 20 mph, increasing to 25 to 35 mph 
                    after midnight. 
Mixing Height.......2000 ft AGL. 
Transport Winds.....South 5 to 10 mph. 
Smoke dispersal.....Poor. 

.WEDNESDAY...
Sky/weather.........Partly cloudy (30-40%). 
Max temperature.....45-55 F. 
Min humidity........24-34%. 
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming 
                    upslope/upvalley 4 to 8 mph by 1100.
CWR.................0 percent. 
LAL.................1.
Haines Index........3 very low. 
15K Ft MSL Winds....West 20 to 30 mph. 
Mixing Height.......4000 ft AGL. 
Transport Winds.....Southwest 10 to 15 mph. 
Smoke dispersal.....Poor until 0900, then fair until 1500, then 
                    poor. 

.WEDNESDAY NIGHT...
Sky/weather.........Mostly clear (20-30%). 
Min temperature.....18-28 F. 
Max humidity........50-60%. 
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........3 very low. 
15K Ft MSL Winds....West 20 to 25 mph. 
Mixing Height.......3000 ft AGL. 
Transport Winds.....Southwest 5 mph. 
Smoke dispersal.....Poor. 

.THURSDAY...
Sky/weather.........Mostly sunny (10-20%). 
Max temperature.....45-55 F. 
Min humidity........23-33%. 
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming 
                    upslope/upvalley 4 to 8 mph by 1100.
CWR.................0 percent. 
LAL.................1.
Haines Index........3 very low. 
15K Ft MSL Winds....West 20 to 25 mph. 
Mixing Height.......5000 ft AGL. 
Transport Winds.....Southwest 5 to 10 mph. 
Smoke dispersal.....Poor until 0900, then fair. 

.FORECAST FOR DAY 3 THROUGH 7...
.FRIDAY...Mostly clear. Lows 23-33. Highs 44-54. Winds less than
15 mph. 
.SATURDAY...Mostly clear. Lows 22-32. Highs 46-56. Winds less
than 15 mph. 
.SUNDAY...Partly cloudy. Isolated showers. Lows 27-37. Highs
43-53. Winds less than 15 mph. 
.MONDAY...Mostly cloudy. Scattered showers. Lows 21-31. Highs
35-45. 
.TUESDAY...Partly cloudy. Isolated snow showers. Lows 18-28.
Highs 37-47. 

$$