National Weather Service United States Department of Commerce

COZ291-220130-
Northern San Juan Forecast Area-
321 AM MDT Sat Jul 21 2018

.DISCUSSION...High pressure over Texas will slide west over the weekend
forcing monsoonal moisture into central and western UT then curving east
across northern CO and UT. The High center will move to just south of
the Four Corners by Monday cutting off direct northerly flow of moisture
into the area. Instead moisture will recycle around the High through the
week. The general flow aloft will be from the northwest.

...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 (40-50%). Isolated showers and 
                    thunderstorms until 1200, then scattered 
                    showers and thunderstorms. 
Max temperature.....68-78 F. 
Min humidity........24-34%. 
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming 
                    upslope/upvalley 4 to 8 mph by 1100.
CWR.................10 percent. 
LAL.................2 until 1200, then 4.
Haines Index........4 low. 
15K Ft MSL Winds....Southwest 10 to 15 mph. 
Mixing Height.......2000 ft AGL until 0700, then 11000 ft AGL. 
Transport Winds.....Southwest 5 to 10 mph. 
Smoke dispersal.....Poor until 0900, then good. 

.TONIGHT...
Sky/weather.........Partly cloudy (50-60%). Scattered showers and 
                    thunderstorms until 2400. 
Min temperature.....48-58 F. 
Max humidity........52-62%. 
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming 
                    downslope/downvalley 3 to 6 mph by sunset.
CWR.................20 percent. 
LAL.................4 until 2400, then 1.
Haines Index........4 low. 
15K Ft MSL Winds....West 10 to 15 mph. 
Mixing Height.......7500 ft AGL until 2100, then 2500 ft AGL. 
Transport Winds.....South 5 mph. 
Smoke dispersal.....Fair until 2100, then poor. 

.SUNDAY...
Sky/weather.........Partly cloudy (40-50%) until 1200, then mostly 
                    cloudy (60-70%). Scattered showers and 
                    thunderstorms after 1200. 
Max temperature.....73-83 F. 
Min humidity........21-31%. 
20-foot winds.......Downslope/downvalley 3 to 6 mph becoming 
                    upslope/upvalley 4 to 8 mph by 1100.
CWR.................20 percent. 
LAL.................1 until 1200, then 4.
Haines Index........5 moderate. 
15K Ft MSL Winds....West 10 to 15 mph. 
Mixing Height.......3000 ft AGL until 0800, then 11500 ft AGL. 
Transport Winds.....West 5 mph. 
Smoke dispersal.....Poor until 0900. Good after 1200. 

.FORECAST FOR DAY 3 THROUGH 7...
.MONDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 51-61. Highs 76-86. Winds less than 15 mph. 
.TUESDAY...Mostly cloudy. Scattered showers and isolated
thunderstorms. Lows 51-61. Highs 74-84. Winds less than 15 mph. 
.WEDNESDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 50-60. Highs 76-86. Winds less than 15 mph. 
.THURSDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 51-61. Highs 75-85. 
.FRIDAY...Partly cloudy. Lows 50-60. Highs 75-85. 

$$