FNUS73 KUNR 052221
FWSUNR

SPOT FORECAST FOR JDC RX BURN...SD-RBA
NATIONAL WEATHER SERVICE RAPID CITY SD
421 PM MDT WED AUG 5 2009

FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON AUGUST 06.
IF CONDITIONS BECOME UNREPRESENTATIVE CONTACT THE
NATIONAL WEATHER SERVICE OFFICE IN RAPID CITY.

.DISCUSSION...
ISOLATED THUNDERSTORMS WILL DEVELOP LATER THIS EVENING OVER WESTERN SOUTH
DAKOTA AND SHOULD CONTINUE THROUGH THE OVERNIGHT HOURS. SOME OF THESE
STORMS MAY BE SEVERE WITH LARGE HAIL AND DAMAGING WINDS. THE CHANCE
FOR SEVERE THUNDERSTORMS WILL CONTINUE THROUGH FRIDAY NIGHT. STRONG
STORMS WILL PRODUCE FREQUENT CLOUD TO GROUND LIGHTNING.

.THURSDAY...

SKY/WEATHER.........PARTLY SUNNY. CHANCE OF SHOWERS AND
                    THUNDERSTORMS.
TEMPERATURE.........72 TO 75 AT IGNITION...MAX AROUND 87.
RH..................75 PERCENT AT IGNITION...MIN 50 TO 55 PERCENT.
WIND (20 FT)........SOUTH AT 10 TO 18 MPH INCREASING TO AROUND 20 MPH
                    IN THE AFTERNOON.
CWR.................18 PERCENT.
LAL.................3.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......1900 TO 2900 FT AGL.
TRANSPORT WINDS.....SOUTH 20 TO 30 MPH.
SMOKE DISPERSAL.....GOOD.

.THURSDAY NIGHT...

SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
                    CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
                    EVENING...THEN SLIGHT CHANCE OF SHOWERS AND
                    THUNDERSTORMS AFTER MIDNIGHT.
TEMPERATURE.........MIN 65.
RH..................MAX 93 PERCENT.
WIND (20 FT)........SOUTH WINDS 12 TO 20 MPH.
CWR.................20 PERCENT.
LAL.................3.
HAINES INDEX........3 OR LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......300 TO 800 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 22 TO 30 MPH DECREASING TO 18 TO 23
                    MPH EARLY IN THE MORNING.
SMOKE DISPERSAL.....POOR.

.FRIDAY...

SKY/WEATHER.........MOSTLY SUNNY.
TEMPERATURE.........MAX 92.
RH..................MIN 40 PERCENT.
WIND (20 FT)........SOUTH WINDS 10 TO 15 MPH.
CWR.................12 PERCENT.
LAL.................1.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3300 TO 4300 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 8 TO 17 MPH SHIFTING TO THE SOUTH
                    LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR.

$$

FORECASTER...MS
REQUESTED BY...STEVEN IPSWITCH
TYPE OF REQUEST...PRESCRIBED
.TAG 20090806.JDCRX.01/UNR