FNUS73 KUNR 231357
FWSUNR

SPOT FORECAST FOR MT  RUSHMORE PILES RX...NATIONAL PARK SERVICE
NATIONAL WEATHER SERVICE RAPID CITY SD
657 AM MST WED FEB 23 2011

FORECAST IS BASED ON IGNITION TIME OF 0900 MST ON FEBRUARY 23.
IF CONDITIONS BECOME UNREPRESENTATIVE CONTACT THE
NATIONAL WEATHER SERVICE OFFICE IN RAPID CITY.

.DISCUSSION...ARCTIC AIR WILL BEGIN TO POUR INTO THE REGION TODAY
BRINGING VERY COLD TEMPERATURES THROUGH SATURDAY. AN UPPER LEVEL
DISTURBANCE WILL BRING SNOW TO THE REGION TONIGHT AND IT WILL
CONTINUE THROUGH THURSDAY NIGHT.

.TODAY...

SKY/WEATHER.........PARTLY SUNNY THEN BECOMING CLOUDY.
TEMPERATURE.........21 AT IGNITION...MAX 28.
RH..................67 PERCENT AT IGNITION...MIN 48 PERCENT.
WIND (20 FT)........WINDS NORTHWEST AT 12 MPH AT
                    IGNITION...OTHERWISE NORTH WINDS 7 TO 12 MPH.
CWR.................0 PERCENT.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3100 TO 4100 FT AGL.
TRANSPORT WINDS.....WEST 9 TO 18 MPH SHIFTING TO THE NORTHWEST
                    AROUND 8 MPH LATE IN THE AFTERNOON...THEN
                    SHIFTING TO THE NORTH AROUND 7 MPH LATE IN THE
                    AFTERNOON.
SMOKE DISPERSAL.....FAIR.

.TONIGHT...

SKY/WEATHER.........CLOUDY. SLIGHT CHANCE OF SNOW IN THE
                    EVENING...THEN SNOW LIKELY AFTER MIDNIGHT.
TEMPERATURE.........MIN 8.
RH..................MAX 84 PERCENT.
WIND (20 FT)........EAST WINDS 6 TO 8 MPH.
CWR.................21 PERCENT.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......200 TO 700 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 1 TO 7 MPH.
SMOKE DISPERSAL.....POOR.

.THURSDAY...

SKY/WEATHER.........CLOUDY. SNOW.
TEMPERATURE.........MAX 15.
RH..................MIN 55 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS 6 TO 15 MPH SHIFTING TO THE
                    NORTHEAST AROUND 16 MPH LATE IN THE AFTERNOON.
CWR.................80 PERCENT.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......800 TO 1800 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 7 TO 15 MPH.
SMOKE DISPERSAL.....POOR.

$$
FORECASTER...LC
REQUESTED BY...AAREN NELLEN
TYPE OF REQUEST...PRESCRIBED
.TAG 20110223.MTRUS.01/UNR