FNUS75 KBYZ 211405
FWSBYZ

SPOT FORECAST FOR CAMP GROUND WUI...BIA, CROW AGENCY
NATIONAL WEATHER SERVICE BILLINGS MT
805 AM MDT THU APR 21 2011

FORECAST IS BASED ON IGNITION TIME OF 1100 MDT ON APRIL 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

...COLD FRONT WITH ISOLATED THUNDERSTORMS THIS EVENING...

A COLD FRONT MOVING THROUGH THE REGION TODAY WILL BRING SCATTERED
RAIN SHOWERS OVER THE BURN SITE BY THIS EVENING...BECOMING MORE
NUMEROUS AND WIDESPREAD OVERNIGHT. ISOLATED THUNDERSTORMS WILL BE
POSSIBLE WITH SHOWERS. PRECIPITATION IS EXPECTED TO SWITCH TO A
RAIN/SNOW MIX OVERNIGHT...AND CONTINUE OVER THE BURN SITE THROUGH
FRIDAY AFTERNOON. LIGHT SOUTHEAST TO EAST WINDS WILL CONTINUE
THROUGH THE MORNING...SWITCHING MORE NORTHERLY BY MID
AFTERNOON...AND STRENGTHENING TO 10 TO 20 MPH BY THIS EVENING.
WINDS WILL TURN MORE NORTHWESTERLY...INCREASE TO NEAR 30 MPH OVER
THE BURN SITE AFTER MIDNIGHT...AND CONTINUING UNTIL LATE EVENING.
RH VALUES ARE EXPECTED TO FALL TO AROUND 50 PERCENT TODAY AS
TEMPERATURES RISE TO NEAR 60 DEGREES...BUT RECOVER QUICKLY AS THE
STORM SYSTEM MOVES THROUGH THIS EVENING. TEMPERATURES WILL BE
AROUND 15 DEGREES COOLER FRIDAY.



.TODAY...

SKY/WEATHER.........CLOUDY. ISOLATED RAIN SHOWERS IN THE
                    MORNING...THEN NUMEROUS RAIN SHOWERS AND
                    ISOLATED THUNDERSTORMS IN THE AFTERNOON.
CWR.................30 PERCENT.
LAL.................2...1 TO 8 STRIKES/15 MIN/CELL.
MAX TEMPERATURE.....55-60.
MIN HUMIDITY........44-49 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 10 MPH IN THE MORNING
                    SHIFTING TO THE EAST IN THE AFTERNOON. GUSTY
                    AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS
                    IN THE AFTERNOON.
 RIDGETOP...........WEST 5 TO 15 MPH.
MIXING HEIGHT.......8500 FT AGL.
MIXING WINDS........SOUTHWEST 5 TO 10 MPH.

.TONIGHT...

SKY/WEATHER.........CLOUDY. RAIN SHOWERS AND ISOLATED THUNDERSTORMS
                    IN THE EVENING...THEN RAIN SHOWERS AND SNOW
                    SHOWERS OVERNIGHT.
CWR.................40 PERCENT.
LAL.................2...1 TO 8 STRIKES/15 MIN/CELL.
MIN TEMPERATURE.....29-34.
MAX HUMIDITY........91-96 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTH WINDS 10 TO 20 MPH...INCREASING TO 30MPH
                    LATE. GUSTY AND ERRATIC WINDS EXPECTED NEAR
                    THUNDERSTORMS IN THE EVENING.
 RIDGETOP...........SOUTH 5 TO 15 MPH.
MIXING HEIGHT.......300 FT AGL.
MIXING WINDS........NORTHWEST 10 TO 20 MPH.

.FRIDAY...

SKY/WEATHER.........CLOUDY WITH RAIN SHOWERS AND SNOW SHOWERS.
CWR.................60 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....43-48.
MIN HUMIDITY........65-70 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTHWEST WINDS 15 TO 25 MPH.
 RIDGETOP...........NORTHWEST 30 TO 45 MPH.
MIXING HEIGHT.......6900 FT AGL.
MIXING WINDS........NORTHWEST 15 TO 30 MPH.

$$
FORECASTER...GILSTAD/TESAR
REQUESTED BY...BRYCE ROGERS
TYPE OF REQUEST...PRESCRIBED
.TAG 20110421.CAMPG.01/BYZ