FNUS73 KUNR 042233
FWSUNR

SPOT FORECAST FOR SUNDANCE RX UNIT 34...SD-BKF
NATIONAL WEATHER SERVICE RAPID CITY SD
433 PM MDT FRI SEP 4 2009

FORECAST IS BASED ON IGNITION TIME OF 1625 MDT ON SEPTEMBER 04.
IF CONDITIONS BECOME UNREPRESENTATIVE CONTACT THE
NATIONAL WEATHER SERVICE OFFICE IN RAPID CITY.

.DISCUSSION...AN OUTFLOW BOUNDARY FROM THE THUNDERSTORMS OVER THE BLACK HILLS
MAY BE STRONG ENOUGH TO REACH THE SUNDANCE RX 34 BURN AREA AROUND 6 PM.
IF THE OUTFLOW BOUNDARY DOES REACH THE SUNDANCE RX 34 BURN AREA...WINDS WOULD
BECOME SOUTHEASTERLY AND INCREASE TO 15 TO 20 MPH FOR A SHORT TIME.

OTHERWISE...QUIET WEATHER IS EXPECTED OVERNIGHT WITH RELATIVE HUMIDITY INCREASING
TO AROUND 67 PERCENT BY MORNING.

WARM CONDITIONS ARE EXPECTED OVER THE WEEKEND AS AN UPPER
LEVEL RIDGE BUILDS OVER THE REGION. AFTERNOON HUMIDITIES WILL DROP TO
AROUND 24 PERCENT ON SATURDAY. SOUTH TO SOUTHEAST WINDS WILL PREDOMINATE WITH
BREEZY TO WINDY CONDITIONS EXPECTED ON SUNDAY AFTERNOON.

.REST OF TODAY...

SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....AROUND 79.
MIN HUMIDITY........35 PERCENT.
WIND (20 FT)........SEE NOTE IN THE FIRST LINE OF THE DISCUSSION.
                    OTHERWISE...LIGHT AND VARIABLE WINDS ARE EXPECTED OVERNIGHT.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......8700 TO 9700 FT AGL.
TRANSPORT WINDS.....NORTH 5 TO 10 MPH.
SMOKE DISPERSAL.....FAIR.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY.
MIN TEMPERATURE.....AROUND 59.
MAX HUMIDITY........67 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS 5 TO 7 MPH BECOMING SOUTHWEST
                    7 TO 10 MPH AFTER MIDNIGHT.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......400 TO 900 FT AGL.
TRANSPORT WINDS.....SOUTHEAST AROUND 10 MPH BECOMING SOUTHWEST AROUND 14 MPH
                    AFTER MIDNIGHT.
SMOKE DISPERSAL.....POOR.

.SATURDAY...

SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....AROUND 82.
MIN HUMIDITY........24 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS 8 TO 10 MPH.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......9600 TO 10600 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 10 MPH.
SMOKE DISPERSAL.....GOOD.

$$
FORECASTER...GR
REQUESTED BY...GREGORY
TYPE OF REQUEST...PRESCRIBED
.TAG 20090904.SUNDA.02/UNR