Mon May 20 14:46:08 EDT 2024

Eastern Foot Hills-
Including Rapid City and Piedmont
1245 PM MDT Mon May 20 2024

.TONIGHT...
Sky/weather.........Cloudy. Slight chance of thunderstorms in the 
                    evening. Rain showers likely through the night. 
Chc of wetting rain.70 percent. 
LAL.................2 until 2400, then 1. 
Min temperature.....Around 43. 
Max humidity........93-99 percent. 
20-foot winds.......North 5 to 10 mph. 
Haines Index........2 very low potential for large plume dominated 
                    fire growth. 
Transport winds.....North around 15 mph. 
Smoke dispersal.....Poor. 
Mixing height.......1300 to 1500 ft agl. 

.TUESDAY...
Sky/weather.........Mostly cloudy. Rain showers likely in the 
                    morning, then chance of rain showers and slight 
                    chance of thunderstorms in the afternoon. 
Chc of wetting rain.60 percent. 
LAL.................1 until 1200, then 2. 
Max temperature.....Around 57. 
Min humidity........55 percent. 
20-foot winds.......North 10 to 15 mph with gusts to around 30 mph. 
Haines Index........4 low potential for large plume dominated fire 
                    growth. 
Transport winds.....North around 25 mph. 
Smoke dispersal.....Good. 
Mixing height.......3600 to 4500 ft agl. 

.TUESDAY NIGHT...
Sky/weather.........Mostly cloudy then becoming partly cloudy. 
                    Chance of rain showers in the evening. Slight 
                    chance of thunderstorms through the night. 
                    Slight chance of rain showers after midnight. 
Chc of wetting rain.30 percent. 
LAL.................2. 
Min temperature.....Around 41. 
Max humidity........80-86 percent. 
20-foot winds.......West 10 to 15 mph. 
Haines Index........3 very low potential for large plume dominated 
                    fire growth. 
Transport winds.....Northwest around 25 mph becoming west around 15 
                    mph after midnight. 
Smoke dispersal.....Poor. 
Mixing height.......400 to 500 ft agl. 

.WEDNESDAY...
Sky/weather.........Sunny. Slight chance of rain showers. 
Chc of wetting rain.0 percent. 
LAL.................1. 
Max temperature.....Around 69. 
Min humidity........31 percent. 
20-foot winds.......Southwest 5 to 10 mph. 
                    Gusts to around 20 mph in the afternoon. 
Haines Index........6 high potential for large plume dominated fire 
                    growth. 
Transport winds.....Southwest around 15 mph increasing to around 25 
                    mph in the afternoon. 
Smoke dispersal.....Good increasing to excellent in the afternoon. 
Mixing height.......7400 to 9300 ft agl. 


.FORECAST DAYS 3 THROUGH 7...
.THURSDAY...Partly cloudy. Chance of showers. Lows in the upper
40s. Highs in the lower 70s. Southwest winds 10 to 20 mph. 
.FRIDAY...Cooler. Partly cloudy. Chance of showers and slight
chance of thunderstorms. Lows in the lower 40s. Highs in the
lower 60s. Northwest winds around 20 mph. 
.SATURDAY...Warmer. Mostly clear. Slight chance of showers. Lows
in the lower 40s. Highs in the mid 70s. South winds 10 to 15 mph.
.SUNDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the upper 40s. Highs in the upper 60s. 
.MEMORIAL DAY...Partly cloudy. Chance of showers and slight
chance of thunderstorms. Lows in the mid 40s. Highs around 70.