FNUS73 KUNR 181413
FWSUNR

SPOT FORECAST FOR JDC...SD-RBA
NATIONAL WEATHER SERVICE RAPID CITY SD
813 AM MDT TUE AUG 18 2009

FORECAST IS BASED ON IGNITION TIME OF 1100 CDT ON AUGUST 18.
IF CONDITIONS BECOME UNREPRESENTATIVE CONTACT THE
NATIONAL WEATHER SERVICE OFFICE IN RAPID CITY.

.DISCUSSION...BREEZY SOUTHWEST WINDS TODAY WILL BRING WARMER
TEMPERATURES TO THE BURN SITE...AHEAD OF A STRONG COLD FRONT THAT
WILL MOVE THROUGH EARLY WEDNESDAY. THERE IS SLIGHT CHANCE FOR
AFTERNOON AND EVENING THUNDERSTORMS AT THE BURN...WITH SOME STORMS
POSSIBLY BECOMING SEVERE. GUSTY NORTHWEST WINDS ALONG WITH COOL
AND WET WEATHER ARE EXPECTED ON WEDNESDAY BEHIND THE COLD FRONT.

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY. SLIGHT CHANCE OF THUNDERSTORMS
                    LATER IN THE AFTERNOON.
TEMPERATURE.........74 AT IGNITION...MAX 84.
RH..................45 PERCENT AT IGNITION...MIN 30 PERCENT.
WIND (20 FT)........WINDS SOUTHWEST 12 TO 17 MPH AT IGNITION...
                    INCREASING TO 15 TO 25 IN THE AFTERNOON.
CWR.................5 PERCENT.
LAL.................1 UNTIL 1500...THEN 2.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......5500 TO 6500 FT AGL.
TRANSPORT WINDS.....SOUTHWEST INCREASING 20 TO 28 MPH.
SMOKE DISPERSAL.....INCREASING TO VERY GOOD.

.TONIGHT...

SKY/WEATHER.........BECOMING MOSTLY CLOUDY.
                    CHANCE OF SHOWERS AND THUNDERSTORMS.
TEMPERATURE.........MIN 57.
RH..................MAX 86 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 10 TO 17 MPH.
CWR.................20 PERCENT.
LAL.................3.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......400 TO 900 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 20 TO 28 MPH.
SMOKE DISPERSAL.....DECREASING TO POOR.

.WEDNESDAY...

SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SHOWERS AND
                    THUNDERSTORMS.
TEMPERATURE.........MAX 76.
RH..................MIN 40 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 10 TO 15 MPH INCREASING TO
                    20 TO 30 MPH IN THE AFTERNOON.
CWR.................20 PERCENT.
LAL.................3.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......6000 TO 7000 FT AGL.
TRANSPORT WINDS.....NORTHWEST 12 TO 18 MPH INCREASING TO 25 TO 30
                    MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....INCREASING TO VERY GOOD.

$$
FORECASTER...JJ
REQUESTED BY...STEVEN IPSWITCH
TYPE OF REQUEST...PRESCRIBED
.TAG 20090818.JDC__.01/UNR