Mon May 20 17:07:03 EDT 2024

West Jackson and West Grand Counties Above 9000 Feet-
Including East Slopes Park and Northern Gore Ranges, Gore Pass, 
and Rabbit Ears Pass
306 PM MDT Mon May 20 2024

.TONIGHT...
Sky/weather.........Mostly cloudy. Chance of thunderstorms and snow 
                    showers until 2400, then snow showers, rain 
                    showers likely and slight chance of 
                    thunderstorms. 
Min Temperature.....27-35. 
   24 hr trend......Little change. 
Max Humidity........86-96%. 
   24 hr trend......7-10% drier. 
20-foot winds....... 
    Valleys/lwr slopes...West winds 6-14 mph. Gusts up to 25 mph in 
                         the evening. 
    Ridges/upr slopes....West winds 6-14 mph. Gusts up to 30 mph in 
                         the evening. 
Haines Index........3 or very low. 
LAL.................4 until 2400, then 3. 
CWR.................10 percent increasing to 40 percent after 
                    midnight. 
15K FT MSL winds....Southwest 30-40 mph. 
Mixing height.......10500-11500 ft AGL until 2000, then 1000-2000 
                    ft AGL. 
Transport winds.....Southwest around 30 mph until 1900. West 10-15 
                    mph after 2300. 
Smoke dispersal.....Excellent until 1900. Poor after 2000. 

.TUESDAY...
Sky/weather.........Mostly cloudy. Snow showers likely until 1200. 
                    Rain showers likely. Snow showers and chance of 
                    thunderstorms after 1200. 
Max Temperature.....36-46. 
   24 hr trend......15-20 degrees cooler. 
Min Humidity........48-58%. 
   24 hr trend......15-20% wetter. 
20-foot winds....... 
    Valleys/lwr slopes...West winds 8-16 mph. 
    Ridges/upr slopes....West winds 9-17 mph with gusts to around 
                         30 mph. 
Haines Index........3 or very low. 
LAL.................1 until 1200, then 4. 
CWR.................30 percent decreasing to 20 percent in the 
                    afternoon. 
15K FT MSL winds....West 30-40 mph. 
Mixing height.......5000-6000 ft AGL. 
Transport winds.....West 15-20 mph until 1400, then 20-25 mph. 
Smoke dispersal.....Poor until 1100, then good. 

.TUESDAY NIGHT...
Sky/weather.........Mostly cloudy(50-60%) until 2400, then partly 
                    cloudy. Chance of thunderstorms until 2100. 
                    Chance of snow showers until 2200, then slight 
                    chance of snow showers until 2400. 
Min Temperature.....21-27. 
   24 hr trend......7-10 degrees cooler. 
Max Humidity........76-86%. 
   24 hr trend......10-15% drier. 
20-foot winds....... 
    Valleys/lwr slopes...West winds 5-13 mph. Gusts up to 20 mph in 
                         the evening. 
    Ridges/upr slopes....West winds 5-13 mph. Gusts up to 30 mph 
                         decreasing to 20 mph after midnight. 
Haines Index........3 or very low. 
LAL.................4 until 2400, then 1. 
CWR.................10 percent decreasing to 0 percent after 
                    midnight. 
15K FT MSL winds....West 20-30 mph. 
Mixing height.......1500-2500 ft AGL. 
Transport winds.....West 15-20 mph until 0400, then southwest 
                    around 10 mph. 
Smoke dispersal.....Fair until 2000, then poor. 

.WEDNESDAY...
Sky/weather.........Mostly sunny until 0900, then partly 
                    cloudy(35-45%). 
Max Temperature.....45-55. 
   24 hr trend......7-10 degrees warmer. 
Min Humidity........23-33%. 
   24 hr trend......25-35% drier. 
20-foot winds....... 
    Valleys/lwr slopes...Southwest winds 6-14 mph. Gusts up to 20 
                         mph in the afternoon. 
    Ridges/upr slopes....Southwest winds 7-15 mph. Gusts up to 20 
                         mph increasing to 30 mph in the afternoon. 
Haines Index........3 or very low. 
LAL.................1. 
CWR.................0 percent. 
15K FT MSL winds....West 25-35 mph. 
Mixing height.......7000-8000 ft AGL. 
Transport winds.....Southwest 10-15 mph until 1200, then 20-25 mph. 
Smoke dispersal.....Poor until 1100. Very good after 1400. 

.WEDNESDAY NIGHT...Mostly clear. Lows in the lower 30s. Southwest
winds 6-13 mph. 
.THURSDAY...Partly cloudy. Chance of rain showers, snow showers
and slight chance of thunderstorms. Highs in the lower 50s.
Southwest winds 12-18 mph. 
.FRIDAY...Mostly cloudy. Slight chance of thunderstorms and snow
showers. Lows in the upper 20s. Highs in the upper 40s. Southwest
winds 5-12 mph. 
.SATURDAY...Partly cloudy. Chance of rain showers, slight chance
of thunderstorms and snow showers. Lows in the lower 30s. Highs
in the mid 50s. Southwest winds 7-14 mph.