National Weather Service United States Department of Commerce

COZ205-210230-
Colorado River Headwaters-
430 AM MDT Wed Jun 20 2018

.DISCUSSION...Dry and seasonable weather is expected beneath a
ridge of high pressure today. However, a disturbance passing to
the north may bring critical fire weather conditions to the north
Thursday and possibly to much of the area on Friday. Isolated to 
scattered thunderstorms are possible across the north Thursday 
afternoon through Friday morning. A system dropping out of the 
north this weekend is expected to bring a cool down with a chance
for showers and thunderstorms, mainly over the northern mountains
Sunday and Monday.

...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.........Mostly sunny (20-30%). 
Max temperature.....71-81 F. 
Min humidity........17-27%. 
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 decreasing to 15 to 20 mph in 
                    the afternoon. 
Mixing Height.......8000 ft AGL. 
Transport Winds.....West 5 mph. 
Smoke dispersal.....Poor until 0900. Fair after 1200. 

.TONIGHT...
Sky/weather.........Mostly clear (10-20%). 
Min temperature.....43-53 F. 
Max humidity........54-64%. 
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....Northwest 15 to 20 mph increasing to 20 to 30 
                    mph after midnight. 
Mixing Height.......6000 ft AGL until 2100, then 2500 ft AGL. 
Transport Winds.....Northwest 5 mph until 2400, then south. 
Smoke dispersal.....Poor. 

.THURSDAY...
Sky/weather.........Mostly sunny (10-20%). 
Max temperature.....78-88 F. 
Min humidity........11-16%. 
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....Northwest 20 to 25 mph becoming west 15 to 20 
                    mph in the afternoon. 
Mixing Height.......3500 ft AGL until 1000. 14500 ft AGL after 
                    1200. 
Transport Winds.....Southwest 5 mph until 1200, then west 10 to 15 
                    mph. 
Smoke dispersal.....Poor until 0900. Excellent after 1500. 

.FORECAST FOR DAY 3 THROUGH 7...
.FRIDAY...Mostly clear. Lows 45-55. Highs 73-83. West winds 10 to
20 mph with gusts to  25 mph. 
.SATURDAY...Mostly clear. Lows 40-50. Highs 71-81. Winds less
than 15 mph. 
.SUNDAY...Partly cloudy. Isolated showers and thunderstorms. Lows
43-53. Highs 66-76. Winds less than 15 mph. 
.MONDAY...Partly cloudy. Scattered showers and thunderstorms.
Lows 37-47. Highs 67-77. 
.TUESDAY...Mostly clear. Isolated showers and thunderstorms. Lows
41-51. Highs 73-83. 

$$