FNUS75 KGGW 211523
FWSGGW

SPOT FORECAST FOR COTTONWOOD CRK...BLM
NATIONAL WEATHER SERVICE GLASGOW MT
923 AM MDT TUE APR 21 2009

FORECAST IS BASED ON IGNITION TIME OF 1000 MDT ON APRIL 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
WESTERN UNITED STATES UPPER RIDGE MOVES FARTHER EAST TODAY INTO
WESTERN AND CENTRAL MONTANA AND BRINGS WARMER AIR WITH IT. A WEAK
SURFACE TROF OVER CENTRAL MONTANA TRIES TO SQUEEZE INTO EASTERN
MONTANA UNDER THE SURFACE HIGH OVER SASKATCHEWAN. THIS IN
COMBINATION WITH THE WARMING TEMPERATURES AND GOOD MIXING WILL
YIELD A BREEZY AFTERNOON ACROSS THE AREA. THE DOWNSLOPING WIND
WILL HELP LOWER THE RELATIVE HUMIDITIES DOWN TO BELOW 20 PERCENT.
FAIR TO POOR RH RECOVERY TONIGHT WITH VERY DRY...WARM...AND WINDY
CONDITIONS SLATED FOR WEDNESDAY.

.TODAY...
SKY/WEATHER.........SUNNY (10-20 PERCENT).
MAX TEMPERATURE.....76-81.
MIN HUMIDITY........13-18 PERCENT.
20-FOOT WINDS.......NORTHWEST WINDS 8 TO 13 MPH. GUSTS UP TO 25 MPH
                    IN THE AFTERNOON.
LAL.................1.
CWR.................ZERO.
MIXING HEIGHT.......11100 FT AGL.
MIXING WINDS........NORTHWEST AROUND 25 MPH.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT).
MIN TEMPERATURE.....42-47.
MAX HUMIDITY........58-63 PERCENT.
20-FOOT WINDS.......NORTH WINDS 6 TO 11 MPH WITH GUSTS TO AROUND 20
                    MPH IN THE EVENING SHIFTING TO THE SOUTHWEST
                    5 TO 10 MPH AFTER MIDNIGHT.
LAL.................1.
CWR.................ZERO.
MIXING HEIGHT.......400 FT AGL.
MIXING WINDS........WEST AROUND 10 MPH.

.WEDNESDAY...
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT).
MAX TEMPERATURE.....80-85.
MIN HUMIDITY........15-20 PERCENT.
20-FOOT WINDS.......WEST WINDS 15 TO 20 MPH WITH GUSTS UP TO 30 MPH.
LAL.................1.
CWR.................LESS THAN 10 PERCENT.
MIXING HEIGHT.......14200 FT AGL.
MIXING WINDS........WEST AROUND 25 MPH.

$$
FORECASTER...ZIMMERMAN
REQUESTED BY...DISPATCH
TYPE OF REQUEST...PRESCRIBED
.TAG 20090421.COTTO.02/GGW