FNUS75 KBYZ 141357
FWSBYZ

SPOT FORECAST FOR BURNSIDE FIRE...BILLINGS DISPATCH CENTER
NATIONAL WEATHER SERVICE BILLINGS MT
757 AM MDT SUN AUG 14 2011

FORECAST IS BASED ON REQUEST TIME OF 0730 MDT ON AUGUST 14.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
...UNSTABLE TODAY WITH A QUICK WARMUP AFTER CLOUDS DEPART AROUND
NOON...

CLOUDS OVER THE FIRE THIS MORNING WILL ERODE AROUND NOON ALLOWING
FOR A WARM AFTERNOON WITH TEMPERATURES IN THE LOWER 90S. AROUND
1300 EXPECT A WEAK INVERSION TO BREAK WITH HUMIDITY FALLING FROM
35 PERCENT TO 20 PERCENT IN ONE HOUR. THE AIRMASS IS UNSTABLE AND
THE HAINES INDEX WILL BE A 5 THIS AFTERNOON. SURFACE LOW PRESSURE
DEVELOPING OVER EASTERN MONTANA WILL CAUSE THE WINDS TO TREND
SOUTH AND THEN SOUTHWEST AS THE DAY PROGRESSES. A BRIEF SPRINKLE
MAY COME FROM THE CLOUDS THIS MORNING BUT THE MAIN RISK OF
THUNDERSTORMS COMES TOWARDS DARK TONIGHT. MONDAY IS STILL WARM
WITH A BIGGER THUNDERSTORM THREAT. THE INVERSION WILL BREAK TODAY
AROUND 1300 AND EXPECT A HUMIDITY FALL FROM 25 PERCENT TO 15
PERCENT IN ONE HOUR. BORSUM

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....90-95.
MIN HUMIDITY........16-20 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHEAST BECOMING SOUTHWEST WINDS 8 TO 12 MPH.
 RIDGETOP...........SOUTHWEST 10 TO 20 MPH.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY WITH ISOLATED SHOWERS AND
                    THUNDERSTORMS.
CWR.................9 PERCENT.
LAL.................2...1 TO 8 STRIKES/15 MIN/CELL.
MIN TEMPERATURE.....59-64.
MAX HUMIDITY........66-71 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTHWEST WINDS 5 TO 10 MPH. GUSTY AND
                    ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS.
 RIDGETOP...........SOUTHWEST 5 TO 15 MPH.

$$
FORECASTER...BORSUM
REQUESTED BY...CARMEN DRIELING
TYPE OF REQUEST...WILDFIRE
.TAG 20110814.BURNS.01/BYZ