FNUS73 KUNR 161622
FWSUNR

SPOT FORECAST FOR PCK RX 1245...USFS
NATIONAL WEATHER SERVICE RAPID CITY SD
1022 AM MDT THU SEP 16 2010

FORECAST IS BASED ON IGNITION TIME OF 1500 MDT ON SEPTEMBER 16.
IF CONDITIONS BECOME UNREPRESENTATIVE CONTACT THE
NATIONAL WEATHER SERVICE OFFICE IN RAPID CITY.

.DISCUSSION...QUIET WEATHER WILL IS EXPECTED TODAY AND FRIDAY. LOW
PRESSURE WILL DEVELOP ACROSS NORTHEAST WYOMING TODAY. THIS WILL
BRING A SHIFT IN THE WINDS FROM SOUTH THIS MORNING TO THE
WEST/SOUTHWEST IN THE EARLY TO MID AFTERNOON. IT IS WHEN THE WIND
SHIFTS TO THE WEST/SOUTHWEST THAT THE MIXING HEIGHTS WILL JUMP
FROM 3000/4000 FEET UP TO OVER 10000 FEET. ALSO AT THIS
TIME...SMOKE DISPERSAL WILL JUMP FROM FAIR TO EXCELLENT AND
RELATIVE HUMIDITIES WILL DROP TO THE 27 TO 32 PERCENT RANGE. A
COLD FRONT WILL CROSS THE AREA EARLY THIS EVENING BRINGING
NORTHWEST WINDS BEHIND IT. COOLER WEATHER IS EXPECTED FRIDAY WITH
WINDS GRADUALLY SHIFTING TO THE EAST/SOUTHEAST BY THE AFTERNOON.

.REST OF TODAY...

SKY/WEATHER.........MOSTLY SUNNY.
TEMPERATURE.........74 AT IGNITION...MAX 75.
RH..................29 PERCENT AT IGNITION...MIN 27 PERCENT.
WIND (20 FT)........SOUTH WINDS 12 TO 18 MPH...SHIFTING TO THE
                    WEST TO SOUTHWEST 10 TO 16 MPH IN THE
                    AFTERNOON...INCLUDING AT IGNITION.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......10000 TO 11000 FT AGL.
TRANSPORT WINDS.....WEST 17 TO 23 MPH.
SMOKE DISPERSAL.....GOOD INCREASING TO EXCELLENT.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY.
TEMPERATURE.........MIN 48.
RH..................MAX 71 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 6 TO 9 MPH.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......500 TO 800 FT AGL.
TRANSPORT WINDS.....NORTH 20 TO 22 MPH.
SMOKE DISPERSAL.....VERY GOOD DECREASING TO POOR.

.FRIDAY...

SKY/WEATHER.........PARTLY SUNNY.
TEMPERATURE.........MAX 64.
RH..................MIN 50 PERCENT.
WIND (20 FT)........NORTH WINDS AROUND 6 MPH GRADUALLY SHIFTING
                    TO THE EAST TO SOUTHEAST 7 TO 12 MPH IN THE
                    AFTERNOON.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4200 TO 5200 FT AGL.
TRANSPORT WINDS.....NORTHEAST 9 TO 15 MPH SHIFTING TO THE
                    SOUTHEAST 9 TO 15 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....FAIR.

$$
FORECASTER...CALDERON
REQUESTED BY...HAAS
TYPE OF REQUEST...PRESCRIBED
.TAG 20100916.PCKRX.01/UNR