FNUS73 KUNR 191426
FWSUNR

SPOT FORECAST FOR GRAND RIVER RX...USFS
NATIONAL WEATHER SERVICE RAPID CITY SD
826 AM MDT SUN APR 19 2009

FORECAST IS BASED ON IGNITION TIME OF 0815 MDT ON APRIL 19.
IF CONDITIONS BECOME UNREPRESENTATIVE CONTACT THE
NATIONAL WEATHER SERVICE OFFICE IN RAPID CITY.

.DISCUSSION...A BUILDING UPPER LEVEL RIDGE WILL DOMINATE THE
WEATHER TODAY. FULL MIXING THIS AFTERNOON WILL BRING BREEZY WINDS.
WINDS WILL QUICKLY LAY DOWN TONIGHT. A WEAK DISTURBANCE WILL MOVE
THROUGH TONIGHT. THE MAIN EFFECT WILL BE INCREASING CLOUDS.

.TODAY...

SKY/WEATHER.........SUNNY THIS MORNING. A FEW CUMULUS/HIGH CLOUDS
                    THIS AFTERNOON.
TEMPERATURE.........42 AT IGNITION...MAX 61.
RH..................79 PERCENT AT IGNITION...MIN 37 PERCENT.
WIND (20 FT)........WINDS NORTHWEST AT 9 MPH AT IGNITION...OTHERWISE
                    NORTHWEST WINDS 6 TO 13 MPH INCREASING TO
                    15 TO 20 MPH EARLY AFTERNOON...GUSTS
                    AROUND 25 MPH BY MID-AFTERNOON.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......8500 TO 9500 FT AGL.
TRANSPORT WINDS.....NORTHWEST 15 TO 30.
SMOKE DISPERSAL.....BECOMING EXCELLENT THIS MORNING.

.TONIGHT...

SKY/WEATHER.........BECOMING MOSTLY CLOUDY.
TEMPERATURE.........MIN 36.
RH..................MAX 82 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 9 TO 18 MPH BECOMING LIGHT.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......400 TO 900 FT AGL.
TRANSPORT WINDS.....NORTHWEST 15 TO 25 MPH SHIFTING TO THE NORTH 5
                    TO 10 MPH.
SMOKE DISPERSAL.....BECOMING POOR BY MIDNIGHT.

$$
FORECASTER...EH
REQUESTED BY...JESSE OLSON
TYPE OF REQUEST...PRESCRIBED
.TAG 20090419.GRAND.01/UNR