FNUS73 KUNR 112020
FWSUNR

SPOT FORECAST FOR PCK RX...US FOREST SERVICE
NATIONAL WEATHER SERVICE RAPID CITY SD
220 PM MDT MON MAY 11 2009

FORECAST IS BASED ON IGNITION TIME OF 1425 MDT ON MAY 11.
IF CONDITIONS BECOME UNREPRESENTATIVE CONTACT THE
NATIONAL WEATHER SERVICE OFFICE IN RAPID CITY.

.DISCUSSION...PARTLY TO MOSTLY CLOUDY THIS AFTERNOON AND EARLY
EVENING WITH AN ISOLATED RAIN SHOWER OR THUNDERSTORM STILL
POSSIBLE. SOUTHEAST WINDS WILL CONTINUE AT 8 TO 16 MPH THROUGH
LATE AFTERNOON...THEN DECREASE TO 6 TO 10 MPH IN THE EVENING.
TEMPERATURES WILL FALL INTO THE 40S THIS EVENING...WITH A LOW
TEMPERATURE EXPECTED IN THE UPPER 30S. THE MAXIMUM RELATIVE
HUMIDITY BY TOMORROW MORNING IS EXPECTED TO REACH 80 TO 90
PERCENT.

.TODAY...

SKY/WEATHER.........PARTLY TO MOSTLY CLOUDY. AN ISOLATED
                    SHOWER OR THUNDERSTORM LATE IN THE
                    AFTERNOON.
TEMPERATURE.........68 AT IGNITION...MAX 68.
RH..................30 PERCENT AT IGNITION...MIN 30 PERCENT.
WIND (20 FT)........WINDS SOUTHEAST AT 8 TO 16 MPH...10 TO 20
                    MPH AT RIDGETOP.
CWR.................5 PERCENT.
LAL.................2.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......9000 TO 10000 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 16 TO 24 MPH.
SMOKE DISPERSAL.....EXCELLENT.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY WITH ISOLATED SHOWERS AND
                    THUNDERSTORMS EARLY IN THE EVENING...THEN
                    BECOMING PARTLY CLOUDY.
TEMPERATURE.........MIN 38.
RH..................MAX 90 PERCENT.
WIND (20 FT)........SOUTH WINDS 6 TO 10 MPH.
CWR.................5 PERCENT.
LAL.................2 UNTIL 2100...THEN 1.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......DECREASING TO 500 TO 1000 FT AGL.
TRANSPORT WINDS.....SOUTH 16 TO 24 MPH SHIFTING TO THE SOUTHWEST 14
                    TO 16 MPH AFTER MIDNIGHT.
SMOKE DISPERSAL.....VERY GOOD DECREASING TO POOR.

.TUESDAY...

SKY/WEATHER.........PARTLY SUNNY. SHOWERS AND THUNDERSTORMS LIKELY
                    IN THE AFTERNOON.
TEMPERATURE.........MAX 69.
RH..................MIN 35 PERCENT.
WIND (20 FT)........NORTH WINDS 8 TO 12 MPH.
CWR.................30 PERCENT.
LAL.................1 UNTIL 1200...THEN 4.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4800 TO 5800 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 8 TO 16 MPH.
SMOKE DISPERSAL.....FAIR.

$$
FORECASTER...SR
REQUESTED BY...PCK IC
TYPE OF REQUEST...PRESCRIBED
.TAG 20090511.PCKRX.03/UNR