775
FNUS73 KUNR 201154
FWSUNR

Spot Forecast for Power Dam Road Fire...BIA
National Weather Service Rapid City SD
554 AM MDT Fri Sep 20 2024

Forecast is based on forecast start time of 0600 MDT on September 20.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...One more hot and dry day is expected today, with highs
in the lower 90s and relative humidity dipping into the teens.
Southerly winds will increase this afternoon, switching from the
southeast to the southwest around noon. A cold front will move through
tonight around 3 AM MT/4 AM CT, switching winds to the northwest and
increasing to 20 to 30 mph with gusts around 40 mph. The gusty winds
will continue through Saturday, finally diminishing Saturday evening.

.TODAY...

Sky/weather.........Sunny (0-5 percent).
Max temperature.....Around 91.
Min humidity........18 percent.
Wind (20 ft)........Southeast winds 5 to 10 mph shifting to the
                    southwest 10 to 15 mph with gusts up to 25 mph
                    in the afternoon.
CWR.................0 percent.
LAL.................1.
Haines Index........6 or high potential for large plume dominated
                    fire growth.
Mixing height.......8900 to 9400 ft agl.
Transport winds.....Southeast around 15 mph shifting to the
                    southwest in the afternoon.
Smoke dispersal.....Excellent.

.TONIGHT...

Sky/weather.........Mostly clear (5-15 percent).
Min temperature.....Around 56.
Max humidity........63 percent.
Wind (20 ft)........Southwest winds 5 to 10 mph shifting to the
                    northwest 10 to 25 mph with gusts to around 35
                    mph overnight.
CWR.................0 percent.
LAL.................1.
Haines Index........6 or high potential for large plume dominated
                    fire growth.
Mixing height.......400 to 900 ft agl.
Transport winds.....Southwest around 15 mph increasing to northwest
                    around 25 mph overnight.
Smoke dispersal.....Poor.

.SATURDAY...

Sky/weather.........Sunny (5-15 percent).
Max temperature.....Around 71.
Min humidity........30 percent.
Wind (20 ft)........Breezy. North-northwest winds 20 to 30 mph with
                    gusts around 40 mph.
CWR.................0 percent.
LAL.................1.
Haines Index........4 or low potential for large plume dominated
                    fire growth.
Mixing height.......4900 to 5400 ft agl.
Transport winds.....North 35 to 40 mph.
Smoke dispersal.....Excellent.

$$
Forecaster...KP
Requested by...Bert Shields
Type of request...WILDFIRE
.TAG 2422392.9/UNR
.DELDT 09/20/24
.FormatterVersion 2.0.0
.EMAIL bert.shields@bia.gov