FNUS75 KBYZ 222132
FWSBYZ

SPOT FORECAST FOR MAIN BOULDER...USFS - BZC
NATIONAL WEATHER SERVICE BILLINGS MT
332 PM MDT WED APR 22 2009

FORECAST IS BASED ON IGNITION TIME OF 1540 MDT ON APRIL 22.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A STRONG STORM SYSTEM CONTINUES TO MOVE INTO THE AREA THIS AFTERNOON.
RADAR AND SATELLITE ARE NOT SHOWING ANY IMMINENT SHOWERS OR THUNDERSTORMS
TO EFFECT THE AREA...BUT THERE IS AN AREA OF SHOWERS AND THUNDERSTORMS
THAT HAVE DEVELOPED OVER NORTHEAST WYOMING WHICH WILL BE MOVING INTO
THE AREA THIS EVENING. IN ADDITION...THE AIRMASS IS UNSTABLE OVER THE AREA
TODAY SO SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE FROM NOW THROUGH THE
NIGHT. THESE SHOWERS AND THUNDERSTORMS WILL HAVE GUSTY AND ERRATIC WINDS
WITH THEM.

THINGS ARE STILL ON TRACK FOR THE MAIN STORM WHICH WILL ARRIVE INTO
THE AREA BEFORE 10 AM TOMORROW. THIS WILL CAUSE THE WINDS TO SHIFT TO
THE NORTH. EXPECT RAIN AND SNOW THEN OFF AND ON THROUGH FRIDAY.

.TONIGHT...

CWR.................16 PERCENT.
MIN TEMPERATURE.....38-43.
MAX HUMIDITY........78-83 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTH WINDS 5 TO 15 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS IN THE
                    EVENING.
 RIDGETOP...........SOUTHWEST 30 TO 45 MPH.
MIXING HEIGHT.......300 FT AGL.
MIXING WINDS........SOUTHWEST 30 TO 45 MPH.

.THURSDAY...

SKY/WEATHER.........MOSTLY CLOUDY. SCATTERED RAIN SHOWERS IN THE
                    MORNING...THEN RAIN LIKELY IN THE AFTERNOON.
CWR.................37 PERCENT.
MAX TEMPERATURE.....52-57.
MIN HUMIDITY........41-46 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTH WINDS 5 TO 10 MPH IN THE MORNING SHIFTING
                    TO THE NORTH TO NORTHEAST BEFORE NOON.
 RIDGETOP...........SOUTHWEST 20 TO 35 MPH.
MIXING HEIGHT.......11700 FT AGL.
MIXING WINDS........SOUTHWEST 20 TO 35 MPH.

$$
FORECASTER...RASCH
REQUESTED BY...ROGER MEDLEY
TYPE OF REQUEST...PRESCRIBED
.TAG 20090422.MAINB.04/BYZ