Mon May 20 16:15:40 EDT 2024

Niobrara/Lower Elevations of Converse/Thunder Basin National
Grassland-
215 PM MDT Mon May 20 2024

.TONIGHT...
Sky/weather.........Cloudy. Showers until 2100. Slight chance of 
                    thunderstorms until 0300. Showers likely after 
                    2100. 
Min temperature.....38-43. 
   24 hr trend......1 degree warmer. 
Max humidity........100 percent. 
   24 hr trend......21 percent wetter. 
Humidity recovery...Excellent. 
20-foot winds.......Northeast 5 to 10 mph. 
LAL.................3 until 0300, then 1. 
Chc of wetting rain.60 percent. 
Transport winds.....Northeast around 10 mph shifting to the north 
                    after midnight. 
Mixing height.......1800-3300 ft AGL. 
Smoke dispersal.....Poor (16800-24800 knot-ft). 
Haines Index........2 or very low potential for large plume 
                    dominated fire growth. 

.TUESDAY...
Sky/weather.........Mostly cloudy. Showers until 1200, then showers 
                    likely. Slight chance of thunderstorms after 
                    1500. 
Max temperature.....46-51. 
   24 hr trend......1 degree cooler. 
Min humidity........70-76 percent. 
   24 hr trend......13 percent wetter. 
20-foot winds.......Northwest 5 to 10 mph and gusty. 
LAL.................1 until 1500, then 2. 
Chc of wetting rain.60 percent. 
Transport winds.....Northwest around 15 mph. 
Mixing height.......2300-4300 ft AGL. 
Smoke dispersal.....Poor to fair (37500-53600 knot-ft). 
Haines Index........3 or very low potential for large plume 
                    dominated fire growth. 

.TUESDAY NIGHT...
Sky/weather.........Mostly cloudy until 2400, then partly cloudy. 
                    Chance of showers until 2400. Slight chance of 
                    thunderstorms. Slight chance of showers after 
                    2400. 
Min temperature.....33-38. 
   24 hr trend......6 degrees cooler. 
Max humidity........100 percent. 
   24 hr trend......Unchanged. 
Humidity recovery...Excellent. 
20-foot winds.......West 5 to 10 mph. 
LAL.................3 until 2100, then 2 until 0300, then 1. 
Chc of wetting rain.15 percent. 
Transport winds.....West around 15 mph. 
Mixing height.......1600-3600 ft AGL decreasing to 300-1600 ft AGL 
                    after midnight. 
Smoke dispersal.....Poor (9400-37400 knot-ft). 
Haines Index........3 or very low potential for large plume 
                    dominated fire growth. 

.WEDNESDAY...
Sky/weather.........Mostly sunny until 1200, then partly cloudy. 
                    Slight chance of showers after 1200. 
Max temperature.....63-68. 
   24 hr trend......18 degrees warmer. 
Min humidity........23-29 percent. 
   24 hr trend......43 percent drier. 
20-foot winds.......Southwest 5 to 10 mph and gusty. 
LAL.................1. 
Chc of wetting rain.Zero percent. 
Transport winds.....Southwest around 20 mph. 
Mixing height.......2300-4300 ft AGL increasing to 8300-10300 ft 
                    AGL in the afternoon. 
Smoke dispersal.....Fair (45900 knot-ft) increasing to excellent 
                    (160500 knot-ft) in the afternoon. 
Haines Index........3 or very low potential for large plume 
                    dominated fire growth. 

.FORECAST DAYS 3 THROUGH 7...
.THURSDAY...Partly cloudy with chance of showers. Lows in the
lower 40s. Highs in the mid 60s. Southwest winds around 10 mph. 
.FRIDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the mid 30s. Highs in the lower 60s.
Northwest winds around 10 mph. 
.SATURDAY...Warmer. Mostly clear. Slight chance of showers. Lows
in the lower 40s. Highs in the mid 70s. Southwest winds around
10 mph. 
.SUNDAY...Partly cloudy. Chance of showers. Lows in the lower
40s. Highs in the upper 60s. 
.MEMORIAL DAY...Mostly clear. Slight chance of showers. Lows in
the lower 40s. Highs around 70.