FNUS75 KBYZ 232315
FWSBYZ

SPOT FORECAST FOR GILEAD...USFS
NATIONAL WEATHER SERVICE BILLINGS MT
515 PM MDT SUN SEP 23 2012

FORECAST IS BASED ON REQUEST TIME OF 1632 MDT ON SEPTEMBER 23.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A WEAKENING RIDGE OF HIGH PRESSURE WILL BE OVER THE FIRE TONIGHT
THROUGH MONDAY NIGHT. AN UPPER LOW PRESSURE SYSTEM WILL MOVE
SOUTHEAST INTO UTAH DURING THE PERIOD. THIS SYSTEM WILL BRING
MOSTLY CLOUDY SKIES TO THE FIRE...AS WELL AS ISOLATED
SHOWERS AND THUNDERSTORMS MONDAY AFTERNOON AND EVENING. THE
THUNDERSTORMS COULD PRODUCE GUSTY WINDS DUE TO DRY AIR IN THE LOWER
LEVELS OF THE ATMOSPHERE. A FEW SHOWERS MAY LINGER OVER THE FIRE
LATE MONDAY NIGHT. WINDS WILL BE LIGHT AND SLOPE/VALLEY DOMINATED
THROUGH MONDAY NIGHT. IT WILL REMAIN WARM...IN THE 50S...BOTH
NIGHTS WITH HIGHER HUMIDITY RECOVERIES MONDAY NIGHT. TEMPERATURES
WILL REACH THE 60S ON MONDAY WITH RELATIVE HUMIDITIES IN THE 20S.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MIN TEMPERATURE.....52-57.
MAX HUMIDITY........42-47 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......DOWNSLOPE/DOWN-VALLEY WINDS 3 TO 8 MPH.
 RIDGETOP...........EAST 5 TO 10 MPH BECOMING LIGHT OVERNIGHT.
MIXING HEIGHT.......2100 FT AGL.
MIXING WINDS........LIGHT AND VARIABLE WINDS.
HAINES INDEX........4.

.MONDAY...

SKY/WEATHER.........PARTLY SUNNY. ISOLATED SHOWERS AND
                    THUNDERSTORMS IN THE AFTERNOON.
CWR.................10 PERCENT.
LAL.................2...1 TO 8 STRIKES/15 MIN/CELL.
MAX TEMPERATURE.....63-69.
MIN HUMIDITY........24-29 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......UPSLOPE/UP-VALLEY WINDS 5 TO 10 MPH. GUSTY
                    AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS
                    IN THE AFTERNOON.
 RIDGETOP...........NORTH 5 TO 10 MPH.
MIXING HEIGHT.......7100 FT AGL.
MIXING WINDS........NORTH 5 TO 10 MPH.
HAINES INDEX........4.

.MONDAY NIGHT...

SKY/WEATHER.........MOSTLY CLOUDY. ISOLATED SHOWERS AND
                    THUNDERSTORMS IN THE EVENING...THEN ISOLATED
                    RAIN SHOWERS OVERNIGHT.
CWR.................10 PERCENT.
LAL.................2...1 TO 8 STRIKES/15 MIN/CELL.
MIN TEMPERATURE.....51-56.
MAX HUMIDITY........50-55 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......DOWNSLOPE/DOWN-VALLEY WINDS 5 TO 10 MPH.
                    GUSTY AND ERRATIC WINDS EXPECTED NEAR
                    THUNDERSTORMS IN THE EVENING.
 RIDGETOP...........LIGHT WINDS...BECOMING NORTHWEST 5 TO 10 MPH BY
                    MORNING.
MIXING HEIGHT.......2100 FT AGL.
MIXING WINDS........LIGHT WINDS.
HAINES INDEX........3.

$$
FORECASTER...ARTHUR
REQUESTED BY...KEVIN HILLARD
TYPE OF REQUEST...WILDFIRE
.TAG 20120923.GILEA.02/BYZ