FNUS75 KBYZ 021529
FWSBYZ

SPOT FORECAST FOR EARLY BIRD RX...NORTHERN CHEYENNE
NATIONAL WEATHER SERVICE BILLINGS MT
929 AM MDT SUN AUG 2 2009

FORECAST IS BASED ON IGNITION TIME OF 1000 MDT ON AUGUST 02.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

SKIES WILL BE MOSTLY SUNNY THIS MORNING WITH INCREASING CLOUDS DURING THE
AFTERNOON. A WEAK COOL FRONT WILL IMPACT THE BURN SITE THIS
AFTERNOON INTO THIS EVENING. THE FRONT IS EXPECTED TO MOVE ACROSS
THE SITE BETWEEN 1500 MDT AND 1600 MDT. GUSTY WESTERLY WINDS OF 15
TO 25 MPH WILL BE LIKELY AHEAD OF THE FRONT WITH A WIND SHIFT TO
THE NORTHWEST AT SPEEDS 10 TO 20 MPH BEHIND THE FRONT...WITH
WINDS BECOMING LIGHT FROM THE NORTHEAST THIS EVENING. THERE WILL
BE AN ISOLATED CHANCE FOR A THUNDERSTORM THIS AFTERNOON AND
EVENING WITH GUSTY ERRATIC WINDS EXPECTED NEAR AND IN ANY
THUNDERSTORM.

.REST OF TODAY...

SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS AND
                    THUNDERSTORMS IN THE AFTERNOON.
CWR.................13 PERCENT.
LAL.................3...9 TO 15 STRIKES/15 MIN/CELL.
MAX TEMPERATURE.....84-89.
MIN HUMIDITY........15-20 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......WEST WINDS 15 TO 25 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS IN THE
                    AFTERNOON.
 RIDGETOP...........WEST 15 TO 30 MPH.
MIXING HEIGHT.......13000 FT AGL.
MIXING WINDS........WEST 15 TO 25 MPH.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS AND
                    THUNDERSTORMS IN THE EVENING.
CWR.................12 PERCENT.
LAL.................2...1 TO 8 STRIKES/15 MIN/CELL.
MIN TEMPERATURE.....60-65.
MAX HUMIDITY........70-75 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTHWEST WINDS 5 TO 10 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS IN THE
                    EVENING.
 RIDGETOP...........NORTHWEST 10 TO 20 MPH.
MIXING HEIGHT.......300 FT AGL.
MIXING WINDS........NORTH 10 TO 20 MPH.

.MONDAY...

SKY/WEATHER.........PARTLY CLOUDY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....80-85.
MIN HUMIDITY........22-27 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......LIGHT WINDS IN THE MORNING BECOMING NORTH 5 TO
                    10 MPH IN THE AFTERNOON.
 RIDGETOP...........WEST 10 TO 20 MPH.
MIXING HEIGHT.......10200 FT AGL.
MIXING WINDS........NORTHWEST 5 TO 15 MPH.

$$
FORECASTER...HOOLEY
REQUESTED BY...LELAND BLACK
TYPE OF REQUEST...PRESCRIBED
.TAG 20090802.EARLY.01/BYZ