FNUS75 KBYZ 121637
FWSBYZ

SPOT FORECAST FOR BULL FIRE...FOREST SERVICE
NATIONAL WEATHER SERVICE BILLINGS MT
1037 AM MDT FRI AUG 12 2011

FORECAST IS BASED ON REQUEST TIME OF 1018 MDT ON AUGUST 12.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A DRYING AND WARMING TREND SHOULD BE EXPECTED THE NEXT FEW DAYS
OVER THE FIRE AS AN UPPER LEVEL RIDGE MOVES INTO THE AREA. EXPECT
HUMIDITY VALUES TO FALL TO 20 PERCENT TODAY AND LOWER ON SATURDAY
BUT WINDS SHOULD FOLLOW MAINLY UPSLOPE/UPVALLEY PATTERNS. BY
SUNDAY THE PATTERN BEGINS TO SHIFT A BIT ALLOWING SOUTHWEST FLOW
TO BRING UNSTABLE AIR OVER THE FIRE WITH INCREASING CUMULUS
ACTIVITY.

.REST OF TODAY...

SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....67-71.
MIN HUMIDITY........19-24 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......LIGHT WINDS LATE IN THE MORNING BECOMING SOUTH 5
                    TO 10 MPH IN THE AFTERNOON.
 RIDGETOP...........WEST 10 TO 20 MPH.
MIXING HEIGHT.......3100 FT AGL.
MIXING WINDS........WEST 5 TO 15 MPH.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MIN TEMPERATURE.....36-41.
MAX HUMIDITY........84-89 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTH WINDS 5 TO 10 MPH.
 RIDGETOP...........WEST 10 TO 20 MPH.
MIXING HEIGHT.......300 FT AGL.
MIXING WINDS........WEST 5 TO 15 MPH.

.SATURDAY...

SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....73-77.
MIN HUMIDITY........16-20 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......LIGHT WINDS IN THE MORNING BECOMING SOUTH 5
                    TO 10 MPH IN THE AFTERNOON.
 RIDGETOP...........SOUTHWEST 10 TO 20 MPH.
MIXING HEIGHT.......4200 FT AGL.
MIXING WINDS........SOUTHWEST 10 TO 20 MPH.

$$
FORECASTER...BORSUM
REQUESTED BY...TRISTA BABCOCK
TYPE OF REQUEST...WILDFIRE
.TAG 20110812.BULLF.01/BYZ