FNUS73 KUNR 222347
FWSUNR

SPOT FORECAST FOR 777...SD-SDS
NATIONAL WEATHER SERVICE RAPID CITY SD
547 PM MDT WED APR 22 2009

FORECAST IS BASED ON REQUEST TIME OF 1726 MDT ON APRIL 22.
IF CONDITIONS BECOME UNREPRESENTATIVE CONTACT THE
NATIONAL WEATHER SERVICE OFFICE IN RAPID CITY.

.DISCUSSION...A WEAK UPPER LEVEL DISTURBANCE WILL MOVE ACROSS THE
AREA THIS EVENING BRINGING ISOLATED SHOWERS AND THUNDERSTORMS TO THE
AREA. THIS ACTIVITY WILL DIMINISH AFTER SUNSET. GIVEN THE VERY DRY LOWER
LEVELS OF THE ATMOSPHERE THIS EVENING...RAIN WILL STRUGGLE TO MAKE
IT TO THE GROUND. IN ADDITION...SOME OF THE STORMS MAY PRODUCE
BRIEF GUSTY ERRATIC WINDS. A COLD FRONT WILL SWEEP ACROSS THE AREA
LATE TOMORROW AFTERNOON SHIFTING WINDS TO THE NORTH AND BRINING A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS TO THE FIRE AREA.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS AND
                    THUNDERSTORMS IN THE EVENING.
TEMPERATURE.........76 AT REQUEST...MIN 50.
RH..................24 PERCENT AT REQUEST...MAX 54 PERCENT.
WIND (20 FT)........WINDS NORTHWEST AT 6 MPH AT REQUEST...BECOMING
                    SOUTHWEST AT 6 TO 9 MPH.
CWR.................0 PERCENT.
LAL.................2 UNTIL 2400...THEN 1.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......100 TO 600 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 6 TO 10 MPH.
SMOKE DISPERSAL.....POOR.

.THURSDAY...

SKY/WEATHER.........MOSTLY SUNNY. SLIGHT CHANCE OF SHOWERS AND
                    THUNDERSTORMS IN THE AFTERNOON.
TEMPERATURE.........MAX 73.
RH..................MIN 25 PERCENT.
WIND (20 FT)........WEST WINDS 10 TO 18 MPH INCREASING TO AROUND 20
                    MPH LATE IN THE AFTERNOON...THEN SHIFTING TO
                    THE NORTH AROUND 18 MPH LATE IN THE AFTERNOON.
CWR.................0 PERCENT INCREASING TO 10 PERCENT IN THE
                    AFTERNOON.
LAL.................1 UNTIL 1200...THEN 2.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......1400 TO 2400 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 10 TO 17 MPH SHIFTING TO THE
                    NORTHWEST 16 TO 21 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....FAIR.

$$
FORECASTER...JW
REQUESTED BY...IC
TYPE OF REQUEST...WILDFIRE
.TAG 20090422.777__.01/UNR