Fri May 17 09:09:10 EDT 2024

Box Butte/South Sioux/Niobrara River-
708 AM MDT Fri May 17 2024

.TODAY...
Sky/weather.........Mostly sunny. Slight chance of showers and 
                    thunderstorms after 1500. Some thunderstorms 
                    may produce gusty winds after 1500. 
Max temperature.....83-88. 
   24 hr trend......9 degrees warmer. 
Min humidity........11-17 percent. 
   24 hr trend......7 percent drier. 
20-foot winds.......West around 15 mph with higher gusts. 
LAL.................1 until 1500, then 3. 
Chc of wetting rain.Zero percent. 
Transport winds.....West around 20 mph. 
Mixing height.......3700-5700 ft AGL increasing to 11900-13900 ft 
                    AGL in the afternoon. 
Smoke dispersal.....Good (61800 knot-ft) increasing to excellent 
                    (253600 knot-ft) in the afternoon. 
Haines Index........3 or very low potential for large plume 
                    dominated fire growth. 

.TONIGHT...
Sky/weather.........Mostly clear. Slight chance of showers and 
                    thunderstorms until 2100. Some thunderstorms 
                    may produce gusty winds until 2100. 
Min temperature.....42-47. 
   24 hr trend......5 degrees cooler. 
Max humidity........66-72 percent. 
   24 hr trend......5 percent wetter. 
Humidity recovery...Fair. 
20-foot winds.......West around 15 mph and gusty. 
LAL.................3 until 2100, then 1. 
Chc of wetting rain.Zero percent. 
Transport winds.....West around 25 mph shifting to the northwest 
                    after midnight. 
Mixing height.......6300-8300 ft AGL decreasing to 500-2500 ft AGL 
                    after midnight. 
Smoke dispersal.....Very good (148100 knot-ft) decreasing to poor 
                    (36000 knot-ft) after midnight. 
Haines Index........4 or low potential for large plume dominated 
                    fire growth. 

.SATURDAY...
Sky/weather.........Mostly sunny. 
Max temperature.....71-76. 
   24 hr trend......12 degrees cooler. 
Min humidity........15-21 percent. 
   24 hr trend......2 percent wetter. 
20-foot winds.......West around 10 mph with higher gusts. 
LAL.................1. 
Chc of wetting rain.Zero percent. 
Transport winds.....Northwest around 20 mph becoming west around 10 
                    mph in the afternoon. 
Mixing height.......2300-4300 ft AGL increasing to 5300-7300 ft AGL 
                    in the afternoon. 
Smoke dispersal.....Fair to good (57900-62500 knot-ft). 
Haines Index........5 or moderate potential for large plume 
                    dominated fire growth. 

.FORECAST DAYS 3 THROUGH 7...
.SUNDAY...Partly cloudy with chance of showers and thunderstorms.
Lows in the lower 50s. Highs around 80. South winds around
10 mph. 
.MONDAY...Cooler. Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the mid 40s. Highs in the mid
60s. North winds around 10 mph. 
.TUESDAY...Mostly cloudy with showers likely and slight chance of
thunderstorms. Lows in the lower 40s. Highs in the upper 50s.
Northwest winds around 10 mph. 
.WEDNESDAY...Warmer. Partly cloudy. Chance of showers and slight
chance of thunderstorms. Lows in the upper 30s. Highs around 70. 
.THURSDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the lower 70s.