FNUS73 KUNR 031423
FWSUNR

SPOT FORECAST FOR HEADQUARTERS WEST RX...NATIONAL PARK SERVICE
NATIONAL WEATHER SERVICE RAPID CITY SD
823 AM MDT THU SEP 3 2009

FORECAST IS BASED ON IGNITION TIME OF 1000 MDT ON SEPTEMBER 03.
IF CONDITIONS BECOME UNREPRESENTATIVE CONTACT THE
NATIONAL WEATHER SERVICE OFFICE IN RAPID CITY.

.DISCUSSION...MOSTLY SUNNY SKIES ARE EXPECTED TODAY. SOME LOW
CLOUDS MAY CREEP UP TO OR SLIGHTLY OVER THE HOGBACK TO THE EAST
THIS MORNING...BUT SHOULD CLEAR OUT BY NOON. SOME FAIR WEATHER
CUMULUS MAY DEVELOP OVER THE BLACK HILLS THIS AFTERNOON. HIGH
TEMPERATURES ARE EXPECTED TO CLIMB INTO THE MID 80S WITH THE
AFTERNOON MINIMUM RELATIVE HUMIDITY FALLING TO AROUND 25 PERCENT.
WINDS WILL BE LIGHT OUT OF THE EAST...BECOMING SOUTHEAST BY LATE
AFTERNOON.

.TODAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....AROUND 85.
MIN HUMIDITY........25 PERCENT.
WIND (20 FT)........NORTHEAST WINDS 5 TO 8 MPH SHIFTING TO THE
                    SOUTHEAST 5 TO 8 MPH LATE IN THE AFTERNOON.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4200 TO 5200 FT AGL.
TRANSPORT WINDS.....NORTHEAST AROUND 8 MPH.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
MIN TEMPERATURE.....AROUND 55.
MAX HUMIDITY........70 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS 6 TO 10 MPH.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......300 TO 500 FT AGL.
TRANSPORT WINDS.....SOUTHEAST AROUND 10 MPH.

.FRIDAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....AROUND 87.
MIN HUMIDITY........22 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS 6 TO 10 MPH INCREASING TO
                    10 TO 14 MPH IN THE AFTERNOON.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......5200 TO 6200 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 10 MPH.

$$
FORECASTER...SR
REQUESTED BY...DAN SWANSON
TYPE OF REQUEST...PRESCRIBED
.TAG 20090903.HEADQ.02/UNR