FNUS73 KUNR 211411
FWSUNR

SPOT FORECAST FOR SUNDANCE RX  21...USFS
NATIONAL WEATHER SERVICE RAPID CITY SD
811 AM MDT THU OCT 21 2010

FORECAST IS BASED ON IGNITION TIME OF 1000 MDT ON OCTOBER 21.
IF CONDITIONS BECOME UNREPRESENTATIVE CONTACT THE
NATIONAL WEATHER SERVICE OFFICE IN RAPID CITY.

.DISCUSSION...AN UPPER LEVEL RIDGE OF HIGH PRESSURE WILL BRING SUNNY
SKIES AND WARM TEMPERATURES TO THE AREA TODAY. THE HIGH TEMPERATURE
WILL BE IN THE UPPER 60S WITH MINIMUM RELATIVE HUMIDITY OF 22-25
PERCENT. THE COMBINATION OF MIXING HEIGHT AND TRANSPORT WIND WILL
RESULT IN A SMOKE DISPERSAL IN THE HIGH END OF THE POOR CATEGORY TO
THE LOW END OF THE FAIR CATEGORY.

.TODAY...

SKY/WEATHER.........SUNNY.
TEMPERATURE.........56 AT IGNITION...MAX 67-69.
RH..................33-35 PERCENT AT IGNITION...MIN 22-25 PERCENT.
WIND (20 FT)........VARIABLE WINDS 2 TO 4 MPH BECOMING UPSLOPE/UPVALLEY
                    5 TO 9 MPH.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3600 TO 4100 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 8 TO 10 MPH.
SMOKE DISPERSAL.....FAIR.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
TEMPERATURE.........MIN 42-44.
RH..................MAX 50-55 PERCENT.
WIND (20 FT)........SOUTH WINDS 4 TO 8 MPH.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......200 TO 600 FT AGL.
TRANSPORT WINDS.....SOUTH 8 TO 10 MPH.
SMOKE DISPERSAL.....POOR.

.FRIDAY...

SKY/WEATHER.........MOSTLY SUNNY.
TEMPERATURE.........MAX 62-64.
RH..................MIN 26-30 PERCENT.
WIND (20 FT)........EAST WINDS 5 TO 10 MPH.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......3300 TO 4000 FT AGL.
TRANSPORT WINDS.....EAST 6 TO 9 MPH.
SMOKE DISPERSAL.....POOR.

$$
FORECASTER...NWS
REQUESTED BY...USFS
TYPE OF REQUEST...PRESCRIBED
.TAG 20101021.SUNDA.02/UNR