National Weather Service United States Department of Commerce

 

COZ207-181245-
Southwest Colorado Lower Forecast Area-
243 PM MDT Tue Jul 17 2018

.DISCUSSION...Showers and thunderstorms will continue to develop
through this afternoon off of the mountains moving from west to 
east before tapering off around sunset tonight. Slightly drier 
air will move in from the west on Wednesday. Storms are still
expected over the higher terrain (especially in the San Juans),
however, the risk for moderate to heavy rain will lower over the
next few days across most of western Colorado and NE Utah. 
Locations in SE Utah could still receive soaking rains from
afternoon thunderstorms as moisture remains in place. Widespread
showers and thunderstorms are expected to develop again Friday
afternoon.

...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 (40-50%). Isolated showers and 
                    thunderstorms until 2400. 
Min temperature.....56-66 F. 
Max humidity........63-78%. 
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming 
                    downslope/downvalley 3 to 6 mph by sunset.
CWR.................10 percent. 
LAL.................2 until 2400, then 1.
Haines Index........4 low. 
15K Ft MSL Winds....North 10 to 15 mph. 
Mixing Height.......11500 ft AGL until 2000. 2000 ft AGL after 
                    2300. 
Transport Winds.....Southeast 5 mph. 
Smoke dispersal.....Fair until 2100, then poor. 

.WEDNESDAY...
Sky/weather.........Mostly sunny (20-30%) until 1200, then partly 
                    cloudy (30-40%). 
Max temperature.....84-94 F. 
Min humidity........13-23%. 
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........5 moderate. 
15K Ft MSL Winds....Northwest 15 to 20 mph. 
Mixing Height.......2500 ft AGL until 0800, then 13500 ft AGL. 
Transport Winds.....North 5 mph until 1200, then northwest 10 to 15 
                    mph. 
Smoke dispersal.....Poor until 0900. Very good after 1200. 

.WEDNESDAY NIGHT...
Sky/weather.........Mostly clear (20-30%). 
Min temperature.....57-67 F. 
Max humidity........40-50%. 
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........6 high. 
15K Ft MSL Winds....North 15 to 20 mph, decreasing to 10 to 15 mph 
                    after midnight. 
Mixing Height.......3500 ft AGL. 
Transport Winds.....North 10 to 15 mph until 2400, then northeast 5 
                    mph. 
Smoke dispersal.....Very good until 2100. Poor after 2400. 

.THURSDAY...
Sky/weather.........Mostly sunny (20-30%) until 1200, then partly 
                    cloudy (30-40%). 
Max temperature.....86-96 F. 
Min humidity........10-15%. 
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........6 high. 
15K Ft MSL Winds....North 10 to 15 mph. 
Mixing Height.......7000 ft AGL until 1100, then 15000 ft AGL. 
Transport Winds.....North 5 mph. 
Smoke dispersal.....Poor until 0900. Good after 1200. 

.FORECAST FOR DAY 3 THROUGH 7...
.FRIDAY...Partly cloudy. Isolated showers and thunderstorms. Lows
59-69. Highs 89-99. Winds less than 15 mph. 
.SATURDAY...Partly cloudy. Isolated showers and thunderstorms.
Lows 59-69. Highs 86-96. Winds less than 15 mph. 
.SUNDAY...Partly cloudy. Isolated showers and thunderstorms. Lows
58-68. Highs 87-97. Winds less than 15 mph. 
.MONDAY...Partly cloudy. Isolated showers and thunderstorms. Lows
58-68. Highs 88-98. 
.TUESDAY...Partly cloudy. Isolated showers and thunderstorms.
Lows 58-68. Highs 87-97. 

$$