FNUS73 KUNR 181840
FWSUNR

SPOT FORECAST FOR PCK RX...SD-BKF
NATIONAL WEATHER SERVICE RAPID CITY SD
1240 PM MDT MON MAY 18 2009

FORECAST IS BASED ON IGNITION TIME OF 1254 MDT ON MAY 18.
IF CONDITIONS BECOME UNREPRESENTATIVE CONTACT THE
NATIONAL WEATHER SERVICE OFFICE IN RAPID CITY.

.DISCUSSION...AN UPPER LEVEL RIDGE OVER THE NORTHERN PLAINS WILL
DOMINATE THE WEATHER TODAY AND TUESDAY...BUT IT WILL BREAK DOWN ON
WEDNESDAY. TEMPERATURES THIS AFTERNOON WILL BE AROUND 15 DEGREES ABOVE
NORMAL WITH LOW RELATIVE HUMIDITY.

TUESDAY WILL SEE ANOTHER DAY OF ABOVE NORMAL TEMPERATURES...WITH RETURN
SOUTHERLY FLOW DEVELOPING BY AFTERNOON. A COLD FRONT WILL MOVE THROUGH ON
WEDNESDAY AS THE UPPER LEVEL RIDGE BREAKS DOWN...BRINGING BETTER CHANCES FOR
THUNDERSTORMS AS WELL AS WINDY CONDITIONS WITH NORTHWEST WINDS.

CHANCES FOR WETTING RAINS WILL BE LOW THROUGH THE PERIOD.

.REST OF TODAY...

SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....AROUND 82.
MIN HUMIDITY........10 PERCENT.
WIND (20 FT)........VARIABLE AROUND 5 MPH.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......8100 TO 9100 FT AGL.
TRANSPORT WINDS.....SOUTHWEST AROUND 14 MPH.
SMOKE DISPERSAL.....GOOD.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY.
MIN TEMPERATURE.....AROUND 47.
MAX HUMIDITY........77 PERCENT.
WIND (20 FT)........EAST WINDS AT 5 MPH OR LESS.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......100 TO 600 FT AGL.
TRANSPORT WINDS.....SOUTHEAST AROUND 9 MPH.
SMOKE DISPERSAL.....POOR.

.TUESDAY...

SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....AROUND 84.
MIN HUMIDITY........22 PERCENT.
WIND (20 FT)........SOUTH WINDS 5 TO 12 MPH.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2800 TO 3800 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 12 MPH.
SMOKE DISPERSAL.....FAIR.

$$
FORECASTER...GR
REQUESTED BY...NORDSVEN
TYPE OF REQUEST...PRESCRIBED
.TAG 20090518.PCKRX.01/UNR