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Spot Forecast
Issued by NWS Rapid City, SD

000
FNUS73 KUNR 171945
FWSUNR

Spot Forecast for WK Memorial...SD-PRA
National Weather Service Rapid City SD
145 PM MDT Wed Apr 17 2024

Forecast is based on ignition time of 1400 MDT on April 17.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...Light rain showers, possibly mixing with a little snow,
will be possible now (~1530) through 2100 hours before drier air
filters in. Chance of wetting rain around 40% (> 0.1" of liquid precip).
Expect RH to bottom out within the next hour or two before moisture
arrives. Winds will remain out of the north with sustained 20 foot
winds up to 20 mph and gusts to 28 mph.

Temperatures will fall below freezing overnight tonight with very
good RH recovery (~85%). North winds will remain breezy overnight,
with sustained winds up to 20 mph tonight.

Breezy northwesterly winds continue tomorrow with much drier air;
daytime minimum RH ~20% expected Thursday afternoon under sunny skies.
Much better mixing is forecast tomorrow with very good smoke dispersal
and transport winds (NW 20-30 mph).

.REST OF TODAY...

Sky/weather.........Partly sunny (65-75 percent). Rain likely.
Max temperature.....Around 51.
Min humidity........35-40 percent around 1500-1600.
Wind (20 ft)........North winds 15 to 20 mph with gusts to around
                    22-28 mph.
CWR.................40 percent.
LAL.................1.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.
Mixing height.......4200 to 4700 ft agl.
Transport winds.....North around 20 mph.
Smoke dispersal.....Good.

.TONIGHT...

Sky/weather.........Cloudy (85-95 percent) then becoming partly
                    cloudy (35-45 percent). Rain showers likely in
                    the evening. Rain chances taper off after 2000-2100.
Min temperature.....Around 26.
Max humidity........85-90 percent.
Wind (20 ft)........North winds 10 to 20 mph.
CWR.................45 percent.
LAL.................1.
Haines Index........4 or low potential for large plume dominated
                    fire growth.
Mixing height.......900 to 1400 ft agl.
Transport winds.....North 20 to 25 mph.
Smoke dispersal.....Poor.

.THURSDAY...

Sky/weather.........Sunny (20-30 percent).
Max temperature.....Around 49.
Min humidity........20-25 percent.
Wind (20 ft)........Northwest winds 10 to 20 mph with gusts to
                    around 25-28 mph.
CWR.................0 percent.
LAL.................1.
Haines Index........5 or moderate potential for large plume
                    dominated fire growth.
Mixing height.......9100 to 9600 ft agl.
Transport winds.....Northwest around 20 mph increasing to around 30
                    mph in the afternoon.
Smoke dispersal.....Excellent.

$$
Forecaster...SE
Requested by...RXB2
Type of request...PRESCRIBED
.TAG 2411252.0/UNR
.DELDT 04/17/24
.FormatterVersion 2.0.0
.EMAIL Justin.bauer@bia.gov