FNUS73 KUNR 111453
FWSUNR

SPOT FORECAST FOR WIND CAVE PILES...NATIONAL PARK SERVICE
NATIONAL WEATHER SERVICE RAPID CITY SD
853 AM MDT TUE MAY 11 2010

FORECAST IS BASED ON IGNITION TIME OF 1000 MDT ON MAY 11.
IF CONDITIONS BECOME UNREPRESENTATIVE CONTACT THE
NATIONAL WEATHER SERVICE OFFICE IN RAPID CITY.

.DISCUSSION...COOL AND CLOUDY CONDITIONS WILL PERSIST TODAY.
TEMPERATURES WILL REMAIN IN THE UPPER 30S TO LOWER 40S WITH THE
AFTERNOON MINIMUM RELATIVE HUMIDITY ONLY FALLING TO AROUND 75
PERCENT. NORTHEAST WINDS WILL CONTINUE THROUGH THE AFTERNOON AT 10
TO 15 MPH.

A LATE SPRING STORM WILL IMPACT THE AREA TONIGHT INTO WEDNESDAY.
SEVERAL INCHES OF HEAVY WET SNOW IS EXPECTED ACROSS THE CENTRAL
AND SOUTHERN BLACK HILLS. TEMPERATURES WILL REMAIN FAIRLY CONSTANT
IN THE LOWER 30S. NORTHEAST WINDS WILL CONTINUE ACROSS THE AREA AT
12 TO 15 MPH. THE STORM SYSTEM WILL SLOWLY MOVE OUT OF THE AREA
LATE WEDNESDAY NIGHT.

MOSTLY CLOUDY AND COOL CONDITIONS WILL PERSIST INTO THURSDAY WITH
SOME RAIN AND SNOW SHOWERS POSSIBLE. HIGH TEMPERATURES WILL
RECOVER INTO THE 40S WITH NORTHWEST WINDS OF 10 TO 15 MPH
EXPECTED.

.TODAY...

SKY/WEATHER.........CLOUDY. LIGHT RAIN SHOWERS OR DRIZZLE.
                    TEMPERATURE.........38 AT IGNITION...MAX 41.
                    MIN HUMIDITY........85 PERCENT AT IGNITION...MIN 75 PERCENT.
WIND (20 FT)........WINDS NORTHEAST AT 10 TO 15 MPH.
CWR.................10 PERCENT.
LAL.................1.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......1900 TO 2900 FT AGL.
TRANSPORT WINDS.....NORTHEAST 15 TO 20 MPH INCREASING TO 20 TO 25
                    MPH EARLY IN THE AFTERNOON.
SMOKE DISPERSAL.....FAIR.

.TONIGHT...

SKY/WEATHER.........CLOUDY. RAIN LIKELY IN THE EVENING...THEN SNOW
                    AFTER MIDNIGHT.
MIN TEMPERATURE.....31.
MAX HUMIDITY........95-100 PERCENT.
WIND (20 FT)........NORTHEAST WINDS 12 TO 15 MPH.
CWR.................72 PERCENT INCREASING TO 90 PERCENT AFTER
                    MIDNIGHT.
LAL.................1.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......900 TO 1400 FT AGL.
TRANSPORT WINDS.....NORTHEAST 15 TO 20 MPH.
SMOKE DISPERSAL.....POOR.

.WEDNESDAY...

SKY/WEATHER.........CLOUDY. SNOW THROUGH THE DAY.
MAX TEMPERATURE.....33.
MIN HUMIDITY........90 PERCENT.
WIND (20 FT)........NORTHEAST WINDS 12 TO 15 MPH.
CWR.................90 PERCENT.
LAL.................1.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......900 TO 1400 FT AGL.
TRANSPORT WINDS.....NORTHEAST 15 TO 20 MPH.
SMOKE DISPERSAL.....POOR.

$$
FORECASTER...SR
REQUESTED BY...AAREN NELLEN
TYPE OF REQUEST...PRESCRIBED
.TAG 20100511.WINDC.01/UNR