FNUS75 KBYZ 011750
FWSBYZ

SPOT FORECAST FOR ACRO...NORTHERN CHEYENNE AGENCY BIA
NATIONAL WEATHER SERVICE BILLINGS MT
1150 AM MDT SAT SEP 1 2012

FORECAST IS BASED ON REQUEST TIME OF 1134 MDT ON SEPTEMBER 01.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT SUNDAY...

.DISCUSSION...
EXPECT INCREASED SHOWER AND THUNDERSTORM ACTIVITY AT THE FIRE
SITE LATE THIS AFTERNOON AND EVENING...MAINLY AFTER 2 PM...WITH
STRONG ERRATIC WIND GUSTS POSSIBLE NEAR ANY STORMS THAT DEVELOP.
THE CHANCE OF SHOWERS OR THUNDERSTORMS WILL LINGER OVERNIGHT THEN
DIMINISH BY EARLY SUNDAY MORNING. WINDS SHOULD PREVAIL OUT OF A
WEST TO NORTH DIRECTION TODAY...BUT AN INCREASE IS EXPECTED AFTER
MIDNIGHT TONIGHT DUE TO A COLD FRONTAL PASSAGE. THIS FRONT WILL
BRING IN COOLER BUT VERY DRY AIR FOR SUNDAY.

.TODAY...

SKY/WEATHER.........PARTLY SUNNY. SCATTERED SHOWERS AND
                    THUNDERSTORMS AFTER 2 PM. ERRATIC WIND
                    GUSTS POSSIBLE NEAR STORMS.
CWR.................10 PERCENT.
LAL.................3...9 TO 15 STRIKES/15 MIN/CELL.
MAX TEMPERATURE.....86-90.
MIN HUMIDITY........18-23 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTHWEST TO NORTH 5-15 MPH BECOMING WEST TO
                    NORTHWEST WITH GUSTS TO 20 MPH FROM MID TO
                    LATE AFTERNOON.
 RIDGETOP...........WEST TO NORTHWEST 10-20 MPH INCREASING TO
                    15-25 MPH.
MIXING HEIGHT.......9000 FT AGL.
MIXING WINDS........WEST 15 MPH.
HAINES INDEX........5.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY. SCATTERED SHOWERS AND
                    THUNDERSTORMS IN THE EVENING...THEN ISOLATED
                    SHOWERS AND THUNDERSTORMS OVERNIGHT. ERRATIC
                    WIND GUSTS POSSIBLE NEAR STORMS.
CWR.................15 PERCENT.
LAL.................3...9 TO 15 STRIKES/15 MIN/CELL.
MIN TEMPERATURE.....58-63.
MAX HUMIDITY........45-55 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......WEST TO NORTHWEST 10-20 MPH BECOMING NORTHWEST
                    15-25 MPH WITH COLD FRONTAL PASSAGE OVERNIGHT.
 RIDGETOP...........NORTHWEST 15-25 MPH. GUSTS TO 35 MPH OVERNIGHT.
MIXING HEIGHT.......FALLING TO 1500 FT AGL.
MIXING WINDS........NORTHWEST 20 MPH.
HAINES INDEX........5.

.SUNDAY...

SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....79-84.
MIN HUMIDITY........11-16 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTHWEST 10-20 MPH EARLY BECOMING WEST
                    6-12 MPH BY NOON. WINDS MAY VARY TO A LIGHT
                    EAST DURING THE AFTERNOON.
 RIDGETOP...........NORTHWEST 10-20 MPH DECREASING TO WEST 5-15
                    MPH BY NOON.
MIXING HEIGHT.......6000 FT AGL.
MIXING WINDS........NORTHWEST 15 MPH.
HAINES INDEX........5.

$$
FORECASTER...LESTER
REQUESTED BY...TRACY SPANG
TYPE OF REQUEST...WILDFIRE
.TAG 20120901.ACRO_.01/BYZ