FNUS73 KUNR 222000
FWSUNR

SPOT FORECAST FOR BITTER RX...US FOREST SERVICE
NATIONAL WEATHER SERVICE RAPID CITY SD
100 PM MST THU JAN 22 2009

FORECAST IS BASED ON IGNITION TIME OF 1500 MST ON JANUARY 22.
IF CONDITIONS BECOME UNREPRESENTATIVE CONTACT THE
NATIONAL WEATHER SERVICE OFFICE IN RAPID CITY.

.DISCUSSION...THE COLD FRONT WILL PASS THROUGH THE BLACK HILLS
AREA LATE THIS AFTERNOON...AROUND 4 PM FOR THE PRESCRIBED FIRE
AREA. CURRENT 20 FOOT WINDS OF 14 TO 18 MPH OUT OF THE NORTHWEST
WILL INCREASE TO 18 TO 22 MPH OUT OF THE NORTHWEST AFTER 4
PM...AND CONTINUE THROUGH MIDNIGHT. WINDS WILL SLOWLY DIMINISH TO
12 TO 16 MPH OUT OF THE NORTH BY FRIDAY MORNING. WITH THE WINDS
REMAINING UP DURING THE EVENING...THE ATMOSPHERE WILL REMAIN
FAIRLY MIXED...KEEPING MIXING HEIGHTS ABOVE 1000 FT AGL THROUGH
ABOUT MIDNIGHT. ONCE THE COLD FRONT MOVES THROUGH THE
AREA...TEMPERATURES WILL FALL QUICKLY INTO THE 30S...AND FALL TO
20 DEGREES BY MIDNIGHT. THE RELATIVE HUMIDITY WILL RECOVER QUICKLY
ONCE THE FRONT MOVES THROUGH...RISING ABOVE 60 PERCENT BY
MIDNIGHT.

.TONIGHT...

SKY/WEATHER.........INCREASING CLOUDS. SLIGHT CHANCE OF SNOW IN
                    THE EVENING...THEN CHANCE OF SNOW AFTER
                    MIDNIGHT.
TEMPERATURE.........MIN 15.
RH..................MAX 77 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 14 TO 22 MPH.
CWR.................10 PERCENT.
MIXING HEIGHT.......900 TO 1400 FT AGL.
TRANSPORT WINDS.....NORTHWEST 16 TO 24 MPH.
SMOKE DISPERSAL.....FAIR UNTIL MIDNIGHT...THEN POOR.

.FRIDAY...

SKY/WEATHER.........CLOUDY. SNOW LIKELY.
TEMPERATURE.........MAX 20.
RH..................MIN 61 PERCENT.
WIND (20 FT)........NORTH WINDS 14 TO 18 MPH.
CWR.................30 PERCENT.
MIXING HEIGHT.......1500 TO 2500 FT AGL.
TRANSPORT WINDS.....NORTHWEST 16 TO 20 MPH.
SMOKE DISPERSAL.....FAIR.

$$
FORECASTER...SR
REQUESTED BY...TERRY TOMPKINS
TYPE OF REQUEST...PRESCRIBED
.TAG 20090122.BITTE.03/UNR