FNUS75 KBYZ 182020
FWSBYZ

SPOT FORECAST FOR MAIN BOULDER 5B...USFS
NATIONAL WEATHER SERVICE BILLINGS MT
219 PM MDT MON MAY 18 2009

FORECAST IS BASED ON IGNITION TIME OF 1425 MDT ON MAY 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

ANOTHER COUPLE OF VERY WARM DAYS ARE IN STORE FOR THE BURN SITE
AS A STRONG RIDGE OF HIGH PRESSURE WILL BE IN CONTROL TODAY AND
MOST OF TUESDAY. TEMPERATURES WILL BE SLIGHTLY WARMER TODAY AND A
FEW DEGREES WARMER YET ON TUESDAY. HUMIDITIES WILL BE IN THE
MIDDLE TO UPPER TEENS TODAY AND TUESDAY. A STRONG COOL FRONT WILL
MOVE THROUGH LATE TUESDAY AFTERNOON OR EARLY TUESDAY EVENING.
SOUTH TO SOUTHWEST WINDS 5 TO 15 MPH CAN BE EXPECTED THIS
AFTERNOON. GUSTY NORTHWEST WINDS WILL BE USHERED IN BEHIND THE
FRONT TUESDAY NIGHT. A SLIGHT CHANCE OF A MAINLY DRY THUNDERSTORM
IS POSSIBLE LATE THIS AFTERNOON AND INTO THIS EVENING AND AGAIN
WITH THE FRONT TUESDAY. THE MAIN THREAT WITH ANY THUNDERSTORM
WILL BE GUSTY ERRATIC WINDS. A SLIGHTLY BETTER CHANCE FOR A
WETTER SHOWER OR THUNDERSTORM IS POSSIBLE FOR TUESDAY NIGHT.
HOOLEY


.REST OF TODAY...

SKY/WEATHER.........PARTLY CLOUDY.
MAX TEMPERATURE.....83-87.
MIN HUMIDITY........14-17 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 15 MPH.
 RIDGETOP...........SOUTHWEST 10 TO 20 MPH.
MIXING HEIGHT.......12500 FT AGL.
MIXING WINDS........WEST 10 TO 20 MPH.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS AND
                    THUNDERSTORMS IN THE EVENING.
CWR.................12 PERCENT.
MIN TEMPERATURE.....48-53.
MAX HUMIDITY........50-55 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTH WINDS 5 TO 15 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS IN THE
                    EVENING.
 RIDGETOP...........WEST 20 TO 35 MPH.
MIXING HEIGHT.......300 FT AGL.
MIXING WINDS........SOUTHWEST 25 TO 40 MPH.

.TUESDAY...

SKY/WEATHER.........PARTLY CLOUDY. SCATTERED SHOWERS AND
                    THUNDERSTORMS.
CWR.................20 PERCENT.
MAX TEMPERATURE.....83-88.
MIN HUMIDITY........15-20 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHWEST WINDS 10 TO 20 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS.
 RIDGETOP...........SOUTHWEST 20 TO 35 MPH.
MIXING HEIGHT.......12400 FT AGL.
MIXING WINDS........SOUTHWEST 25 TO 40 MPH.

$$
FORECASTER...HOOLEY
REQUESTED BY...GREG JUVAN
TYPE OF REQUEST...PRESCRIBED
.TAG 20090518.MAINB.03/BYZ