FNUS75 KBYZ 281922
FWSBYZ

SPOT FORECAST FOR MOOSE CREEK...USDA FOREST SERVICE GALLATIN NATIONAL FOREST
NATIONAL WEATHER SERVICE BILLINGS MT
122 PM MDT MON SEP 28 2009

FORECAST IS BASED ON IGNITION TIME OF 1255 MDT ON SEPTEMBER 28.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

...RED FLAG WARNING WILL BE IN EFFECT FOR TUESDAY...

AN UPPER LEVEL RIDGE OVER THE AREA THIS AFTERNOON WILL MOVE EAST
AND ALLOW SOUTHWEST FLOW ALOFT TO MOVE OVER THE BURN SITE.
THIS WILL SET THE STAGE FOR A VERY WARM AND UNSTABLE AIRMASS TO
INFLUENCE THE BURN SITE ON TUESDAY. RELATIVE HUMIDITY OVER THE
SITE THIS AFTERNOON HAS FALLEN TO NEAR 20 PERCENT AND RECOVERY
OVERNIGHT IS EXPECTED TO BE POOR. RIDGETOP WINDS WILL BECOME
SOUTHWESTERLY OVERNIGHT AND INCREASE IN STRENGTH ON TUESDAY.
EXPECT HUMIDITY IN THE TEENS TUESDAY WITH TEMPERATURES REACHING
NEAR 70. WITH RIDGETOP WINDS REACHING 25 TO 35 MPH DURING
THE DAY ON TUESDAY UPSLOPE WINDS IN THE MORNING MAY REVERSE TO
DOWN VALLEY DURING THE AFTERNOON. A COLD FRONT WILL MOVE OVER THE
BURN SITE LATE TUESDAY WITH AN ISOLATED THUNDERSTORM POSSIBLE TUESDAY
EVENING. EXPECT A GOOD CHANCE FOR RAIN AND SNOW AND MUCH COOLER
WEATHER ON WEDNESDAY. BORSUM

.TODAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....59-63.
MIN HUMIDITY........17-22 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......UPSLOPE 5 TO 8 MPH.
 RIDGETOP...........SOUTHWEST 12 TO 18 MPH.
MIXING HEIGHT.......4100 FT AGL.
MIXING WINDS........SOUTHWEST 15 TO 20 MPH.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY.
MIN TEMPERATURE.....41-46.
MAX HUMIDITY........36-41 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTH WINDS 10 TO 20 MPH.
 RIDGETOP...........SOUTHWEST 10 TO 20 MPH.
MIXING HEIGHT.......300 FT AGL.
MIXING WINDS........SOUTHWEST 15 TO 25 MPH.

.TUESDAY...

SKY/WEATHER.........PARTLY CLOUDY. ISOLATED THUNDERSTORM POSSIBLE
                    BY EARLY EVENING.
MAX TEMPERATURE.....67-71.
MIN HUMIDITY........14-18 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......UPSLOPE WINDS 4 TO 8 MPH IN THE MORNING BECOMING
                    SOUTH WINDS 15 TO 20 MPH WITH GUSTS TO 25 MPH BY
                    AFTERNOON. GUSTY AND ERRATIC WINDS EXPECTED NEAR
                    THUNDERSTORMS IN THE AFTERNOON.
 RIDGETOP...........SOUTHWEST 25 TO 40 MPH.
MIXING HEIGHT.......4300 FT AGL.
MIXING WINDS........SOUTHWEST 20 TO 35 MPH.

$$
FORECASTER...BORSUM
REQUESTED BY...DENNIS SHERIDAN
TYPE OF REQUEST...PRESCRIBED
.TAG 20090928.MOOSE.01/BYZ