FNUS75 KBYZ 231212
FWSBYZ

SPOT FORECAST FOR RANGELAND RX UNIT 19A...NORTHERN CHEYENNE
NATIONAL WEATHER SERVICE BILLINGS MT
612 AM MDT THU APR 23 2009

FORECAST IS BASED ON IGNITION TIME OF 0800 MDT ON APRIL 22.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

A STRONG COLD FRONT IS EXPECTED TO ARRIVE AT THE BURN SITE AROUND
10 AM THIS MORNING. WINDS WILL SHIFT TO THE NORTH BEHIND THE
FRONT AND WILL BE GUSTY DURING THE AFTERNOON. TEMPERATURES THIS
MORNING WILL CLIMB INTO THE LOW TO MID 60S AHEAD OF THE
FRONT...BUT WILL FALL INTO THE 50S IN THE AFTERNOON. RELATIVE
HUMIDITIES WILL FALL INTO THE UPPER 20S TO LOW 30S AHEAD OF THE
FRONT...BUT WILL RISE DURING THE AFTERNOON AS COLD AIR BUILDS IN.
PRECIPITATION IS EXPECTED TO HOLD OFF UNTIL THIS AFTERNOON WITH
GOOD WETTING RAIN CHANCES TONIGHT AND FRIDAY. COOL AND UNSETTLED
WEATHER IS EXPECTED TO CONTINUE THROUGH THE WEEKEND.

.TODAY...

SKY/WEATHER.........MOSTLY CLOUDY. SCATTERED RAIN SHOWERS IN THE
                    AFTERNOON.
CWR.................20 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....62-65.
MIN HUMIDITY........28-34 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTH WIND 4 TO 8 MPH IN THE EARLY MORNING
                    BECOMING NORTH 10 TO 20 MPH WITH GUSTS TO 30
                    MPH AROUND 10 AM.
 RIDGETOP...........SOUTH 10 TO 15 MPH...BECOMING NORTH 10 TO 20 MPH
                    IN THE AFTERNOON.
MIXING HEIGHT.......4300 FT AGL.
MIXING WINDS........SOUTHWEST 10 TO 20 MPH...BECOMING NORTH IN THE
                    AFTERNOON.

.TONIGHT...

SKY/WEATHER.........CLOUDY. RAIN AND SNOW LIKELY IN THE EVENING...
                    CHANGING TO SNOW OVERNIGHT.
CWR.................70 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MIN TEMPERATURE.....30-34.
MAX HUMIDITY........93-98 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTH WINDS 10 TO 20 MPH.
 RIDGETOP...........NORTH 10 TO 20 MPH.
MIXING HEIGHT.......800 FT AGL.
MIXING WINDS........NORTH 10 TO 20 MPH.

.FRIDAY...

SKY/WEATHER.........CLOUDY. SNOW THROUGH THE DAY...MIXING WITH RAIN
                    IN THE AFTERNOON.
CWR.................70 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....37-42.
MIN HUMIDITY........76-81 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTH WINDS 5 TO 15 MPH.
 RIDGETOP...........NORTH 5 TO 10 MPH.
MIXING HEIGHT.......4300 FT AGL.
MIXING WINDS........NORTH 10 TO 20 MPH.

$$
FORECASTER...CHAMBERS
REQUESTED BY...LEE OLD BEAR
TYPE OF REQUEST...PRESCRIBED
.TAG 20090422.RANGE.01/BYZ