National Weather Service United States Department of Commerce

 

UTZ490-160100-
Colorado River Basin-
252 AM MDT Wed Aug 15 2018

.DISCUSSION...Little change is expected until the weekend. The weak trough
projected to skim the northern state borders today will be weaker and drier
than earlier thought so will have little effect on today's weather. Moisture
trapped beneath and cycling within the Great Basin ridge will continue 
producing isolated to scattered afternoon and evening showers and thunderstorms,
mostly over southwest CO and the Continental Divide. This ridge will remain 
firmly planted over the Great Basin until Friday night and Saturday when a 
moderately strong trough from the Pacific Northwest pushes it south and west. 
Friday and Saturday should see an increase in the chance for rain and 
thunderstorms, then drier conditions return the beginning of next week.

...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 (30-40%). Areas of smoke. Near 
                    7000 feet, isolated showers and thunderstorms 
                    after 1200. 
Max temperature.....86-96 F near 5000 feet 
                    74-84 F near 7000 feet. 
   24 hr trend......3 degrees cooler. 
Min humidity........11-16%. 
   24 hr trend......3% wetter. 
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........6 high. 
Mixing Height.......2500 ft AGL until 1000, then 14000 ft AGL. 
Transport Winds.....East 5 mph until 1200, then west. 
Clearing Index......Less than 500 until 1100. 1050 after 1200. 

.TONIGHT...
Sky/weather.........Partly cloudy (40-50%). Areas of smoke. Near 
                    7000 feet, isolated showers until 2400. 
Min temperature.....61-71 F. 
   24 hr trend......1 degree cooler. 
Max humidity........31-41%. 
   24 hr trend......1% drier. 
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. 
Mixing Height.......11500 ft AGL until 2000. 1500 ft AGL after 
                    2100. 
Transport Winds.....North 5 to 10 mph until 2400, then east. 
Clearing Index......950 until 2000. Less than 500 after 2100. 

.THURSDAY...
Sky/weather.........Partly cloudy (30-40%). Near 7000 feet, 
                    isolated showers after 1200. 
Max temperature.....89-99 F near 5000 feet 
                    76-86 F near 7000 feet. 
   24 hr trend......2 degrees warmer. 
Min humidity........11-16%. 
   24 hr trend......1% drier. 
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. 
Mixing Height.......2500 ft AGL until 1000. 13500 ft AGL after 
                    1200. 
Transport Winds.....East 5 mph until 1200, then northwest. 
Clearing Index......Less than 500 until 1100. 1050 after 1200. 

.FORECAST FOR DAY 3 THROUGH 7...
.FRIDAY...Partly cloudy. Isolated showers near 7000 feet. Lows
63-73. Highs 91-101. Winds less than 15 mph. 
.SATURDAY...Partly cloudy. Isolated showers . Lows 63-73. Highs
90-100. Winds less than 15 mph. 
.SUNDAY...Mostly clear. Lows 60-70. Highs 90-100. Winds less than
15 mph. 
.MONDAY...Clear. Lows 60-70. Highs 91-101. 
.TUESDAY...Mostly clear. Isolated showers near 7000 feet. Lows
62-72. Highs 91-101. 

$$