FNUS75 KGGW 212103
FWSGGW

SPOT FORECAST FOR BIG ISLAND...FWS BOW
NATIONAL WEATHER SERVICE GLASGOW MT
303 PM MDT TUE APR 21 2009

FORECAST IS BASED ON IGNITION TIME OF 1445 MDT ON APRIL 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A RIDGE OF HIGH PRESSURE WILL DOMINATE OUR WEATHER THROUGH
WEDNESDAY...WITH A CONTINUED WARMING TREND AND DRY WEATHER. WINDS WILL
INCREASE THOUGH WEDNESDAY AFTERNOON...AS A LOW PRESSURE SYSTEM STARTS
TO APPROACH FROM THE WEST. LOWERING RELATIVE HUMIDITIES ALONG WITH
THE WIND MAY RESULT IN NEAR CRITICAL FIRE WEATHER CONDITIONS.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).
MIN TEMPERATURE.....46-51.
MAX HUMIDITY........71-76 PERCENT.
20-FOOT WINDS.......WEST WINDS AROUND 10 MPH UNTIL AROUND 6PM...
                    THEN DIMINISHING TO LIGHT AND VARIABLE BY SUNSET...
                    CONTINUING THE REST OF THE NIGHT.
                    SOUTHEAST 5 TO 7 MPH AFTER MIDNIGHT.
CWR.................ZERO.
MIXING HEIGHT.......300 FT AGL.
MIXING WINDS........SOUTHEAST AROUND 5 MPH.

.WEDNESDAY...
SKY/WEATHER.........PARTLY CLOUDY (20-30 PERCENT).
MAX TEMPERATURE.....77-82.
MIN HUMIDITY........17-22 PERCENT.
20-FOOT WINDS.......LIGHT AND VARIABLE WINDS UNTIL LATE MORNING...
                    INCREASING RAPIDLY BY NOON...THEN WEST 18 TO 22 MPH
                    WITH GUSTS TO 30 MPH IN THE AFTERNOON.
CWR.................ZERO
MIXING HEIGHT.......8600 FT AGL.
MIXING WINDS........WEST AROUND 21 MPH.


$$
FORECASTER...SIMONSEN
REQUESTED BY...JIM FORSYTHE
TYPE OF REQUEST...PRESCRIBED
.TAG 20090421.BIGIS.01/GGW