Suppression Forecast
Issued by NWS Rapid City, SD

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000
FNUS73 KUNR 241800
FWSUNR

Spot Forecast for FI 210 RX...South Dakota State
National Weather Service Rapid City SD
1100 AM MST Wed Feb 24 2021

Forecast is based on ignition time of 1100 MST on February 24.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...Scattered snow showers will be moving across the
Black Hills and adjacent foothills through the afternoon, but
should diminish by about 6 pm. Brief periods of visibility less
than a mile will alternate with partly cloudy skies. Snowfall
should be an inch or less. Otherwise, synoptically driven flow
will result in northwest winds through the afternoon, gusting to
around 20 mph. Winds will decrease this evening and become
westerly/downslope. Skies will clear in the evening. Light winds
Thursday morning will give way to gusty southwest winds by midday,
although there is the potential for a leeside eddy effect whereby
winds are light and variable through much of the morning.

.REST OF TODAY...

Sky/weather.........Partly sunny. Scattered snow showers.
Max temperature.....Around 37.
Min humidity........45 percent.
Wind (20 ft)........Northwest around 15 mph with gusts to around
                    20 mph.
CWR.................20 percent.
LAL.................1.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.
Mixing height.......5400 to 5900 ft agl.
Transport winds.....Northwest around 25 mph.
Smoke dispersal.....Very good.

.TONIGHT...

Sky/weather.........Mostly clear.
Min temperature.....Around 16.
Max humidity........68 percent.
Wind (20 ft)........West 5 to 10 mph. Gusts to around 17 mph in the
                    evening.
CWR.................0 percent.
LAL.................1.
Haines Index........4 or low potential for large plume dominated
                    fire growth.
Mixing height.......400 to 900 ft agl.
Transport winds.....West around 10 mph.
Smoke dispersal.....Poor.

.THURSDAY...

Sky/weather.........Sunny.
Max temperature.....Around 43.
Min humidity........26 percent.
Wind (20 ft)........Southwest 15 to 20 mph with gusts to around 22
                    mph.
CWR.................0 percent.
LAL.................1.
Haines Index........4 or low potential for large plume dominated
                    fire growth.
Mixing height.......2800 to 3300 ft agl.
Transport winds.....Southwest around 20 mph increasing to around 30
                    mph in the afternoon.
Smoke dispersal.....Good.

$$
Forecaster...MB
Requested by...Melody
Type of request...PRESCRIBED
.TAG 2102939.0/UNR
.DELDT 02/24/21
.FormatterVersion 1.0.26
.EMAIL sdgpc@firenet.gov



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