FNUS75 KBYZ 161624
FWSBYZ

SPOT FORECAST FOR PICKET PIN RX...BLM
NATIONAL WEATHER SERVICE BILLINGS MT
1024 AM MDT THU SEP 16 2010

FORECAST IS BASED ON IGNITION TIME OF 1100 MDT ON SEPTEMBER 16.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A COLD FRONT ALONG THE MONTANA/CANADIAN BORDER THIS MORNING WILL
MOVE INTO THE BURN AREA AROUND 6 PM MDT THIS EVENING. GOOD MIXING
AHEAD OF THE FRONT WILL ALLOW THE NORTHWEST WINDS AT 5 TO 15 MPH
TO BECOME WEST AT 10 TO 20 MPH BY AFTERNOON. THE WINDS WILL THEN
TURN NORTHWEST 5 TO 15 MPH LATE IN THE AFTERNOON. TEMPERATURES
WILL CLIMB INTO THE 70S AND MINIMUM RELATIVE HUMIDITIES WILL BE
15 TO 20 PERCENT. A SECONDARY COLD FRONT WILL SLIDE SOUTHWEST INTO
THE SITE LATE TONIGHT/EARLY FRIDAY MORNING. THE FRONT WILL BRING
ISOLATED RAIN SHOWERS AND POSSIBLY SOME DRIZZLE OVERNIGHT. NORTHWEST
WINDS 5 TO 10 MPH IN THE EVENING WILL BECOME LIGHT OVERNIGHT. THE BURN
AREA WILL REMAIN BEHIND THE FRONT ON FRIDAY. IT WILL BE MUCH COOLER
WITH TEMPERATURES 50 TO 55 DEGREES AND RELATIVE HUMIDITIES IN THE MID 40S
TO LOWER 50S. WINDS WILL BE NORTHEAST 5 TO 15 MPH.




.REST OF TODAY...

SKY/WEATHER.........PARTLY SUNNY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....72-77.
MIN HUMIDITY........15-20 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTHWEST WINDS 5 TO 15 MPH EARLY...
                    BECOMING WEST 10 TO 20 MPH BY AFTERNOON. WINDS
                    THEN TURNING NORTHWEST 5 TO 15 MPH LATE IN THE
                    AFTERNOON.
 RIDGETOP...........WEST 20 TO 35 MPH.
MIXING HEIGHT.......11800 FT AGL.
MIXING WINDS........WEST 15 TO 30 MPH.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY. ISOLATED RAIN SHOWERS
                    AND DRIZZLE OVERNIGHT.
CWR.................8 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MIN TEMPERATURE.....42-47.
MAX HUMIDITY........81-86 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTHWEST WINDS 5 TO 10 MPH IN THE EVENING
                    BECOMING LIGHT OVERNIGHT.
 RIDGETOP...........WEST 5 TO 10 MPH.
MIXING HEIGHT.......300 FT AGL.
MIXING WINDS........WEST 15 TO 25 MPH.

.FRIDAY...

SKY/WEATHER.........MOSTLY CLOUDY WITH SCATTERED RAIN SHOWERS.
CWR.................15 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....50-55.
MIN HUMIDITY........46-51 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTHEAST WINDS 5 TO 15 MPH.
 RIDGETOP...........SOUTHWEST 15 TO 25 MPH.
MIXING HEIGHT.......3100 FT AGL.
MIXING WINDS........SOUTHWEST 15 TO 30 MPH.

$$
FORECASTER...ARTHUR
REQUESTED BY...ANGIE POLLOCK
TYPE OF REQUEST...PRESCRIBED
.TAG 20100916.PICKE.01/BYZ