National Weather Service United States Department of Commerce

Warm, Dry and Windy Friday. Cooler This Weekend with Snow Possible Over NW Colorado Friday Night.

Warm, dry and windy conditions arrive Friday under southwest flow. The next system will move thru Friday night into Saturday morning, bringing light snow to NW Colorado and a cooler weekend. Read More >

 

COZ200-201200-
Little Snake Forecast Area-
152 PM MDT Thu Oct 19 2017

.DISCUSSION...
A few light showers can be expected further south today as a 
shortwave moves across the region. Southwesterly winds will 
increase on Friday as the next Pacific storm and associated cold 
front move into the Great Basin with surface wind gusts of up to 
40 mph possible in northwest Colorado. Scattered to numerous 
showers will develop along the front as it progresses through the 
area Friday night with a significantly cooler air mass moving in 
for Saturday before temperatures begin to rebound as high 
pressure builds to the southwest Sunday and beyond.

...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%). 
Min temperature.....36-46 F. 
Max humidity........70-85%. 
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....Southwest 20 to 30 mph, increasing to 25 to 35 
                    mph after midnight. 
Mixing Height.......2000 ft AGL. 
Transport Winds.....South 10 to 15 mph. 
Smoke dispersal.....Poor. 

.FRIDAY...
Sky/weather.........Partly cloudy (40-50%). Near 6000 feet, 
                    isolated showers after 1200. Near 8000 feet, 
                    isolated showers until 1200, then scattered 
                    showers.
Max temperature.....60-70 F near 6000 feet 
                    53-63 F near 8000 feet. 
Min humidity........25-35% near 6000 feet 
                    33-43% near 8000 feet. 
20-foot winds.......Downslope/downvalley winds 4 to 8 mph, becoming 
                    southwest 20 to 25 mph in the afternoon. 
                    Localized gusts up to 50 mph. 
CWR.................0 percent. 
LAL.................1.
Haines Index........3 very low. 
15K Ft MSL Winds....Southwest 35 to 45 mph, increasing to 40 to 50 
                    mph in the afternoon. 
Mixing Height.......2000 ft AGL until 1000. 10000 ft AGL after 
                    1200. 
Transport Winds.....South 15 to 20 mph until 1200, then southwest 
                    30 to 40 mph. 
Smoke dispersal.....Poor until 0900. Excellent after 1200. 

.FRIDAY NIGHT...
Sky/weather.........Mostly cloudy (60-70%) until 2400, then partly 
                    cloudy (40-50%). Near 6000 feet, scattered 
                    showers. Near 8000 feet, scattered showers 
                    until 2400, then scattered snow showers. 
Min temperature.....24-34 F. 
Max humidity........63-78%. 
20-foot winds.......Upslope/upvalley 4 to 8 mph becoming 
                    downslope/downvalley 3 to 6 mph by sunset.
CWR.................30 percent. 
LAL.................1.
Haines Index........3 very low. 
15K Ft MSL Winds....Southwest 35 to 45 mph, becoming west 20 to 30 
                    mph after midnight. 
Mixing Height.......3500 ft AGL. 
Transport Winds.....Northwest 20 to 30 mph until 2400, then west 15 
                    to 20 mph. 
Smoke dispersal.....Very good until 2100. Poor after 0300. 

.SATURDAY...
Sky/weather.........Near 6000 feet, mostly sunny (20-30%) until 
                    1200, then partly cloudy (30-40%). Near 8000 
                    feet, partly cloudy (30-40%). 
Max temperature.....40-50 F near 6000 feet 
                    35-45 F near 8000 feet. 
Min humidity........23-33% near 6000 feet 
                    30-40% near 8000 feet. 
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....Northwest 30 to 40 mph, increasing to 40 to 50 
                    mph in the afternoon. 
Mixing Height.......7500 ft AGL. 
Transport Winds.....West 10 to 15 mph. 
Smoke dispersal.....Poor until 0900. Very good after 1200. 

.FORECAST FOR DAY 3 THROUGH 7...
.SUNDAY...Partly cloudy. Lows 24-34. Highs 51-61. Winds less than
15 mph. 
.MONDAY...Mostly clear. Lows 29-39. Highs 57-67. Winds less than
15 mph. 
.TUESDAY...Mostly clear. Lows 28-38. Highs 55-65. Winds less than
15 mph. 
.WEDNESDAY...Clear. Lows 26-36. Highs 56-66. 
.THURSDAY...Mostly clear. Lows 28-38. Highs 56-66. 

$$