FNUS75 KBYZ 151424
FWSBYZ

SPOT FORECAST FOR RESERVOIR FIRE...USFS BIGHORN NF
NATIONAL WEATHER SERVICE BILLINGS MT
824 AM MDT THU SEP 15 2011

FORECAST IS BASED ON REQUEST TIME OF 0739 MDT ON SEPTEMBER 15.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
UPPER LEVEL RIDGE MOVING INTO THE REGION WILL BRING WARMER AND
DRIER WEATHER TO THE FIRE. INVERSIONS WILL LIFT SLOWLY TODAY SO DO
NOT EXPECT TEMPERATURES TO CLIMB TO NEAR 60 UNTIL LATE AFTERNOON.
WINDS SHOULD FAVOR UPVALLEY WITH DECREASING RIDGETOP WINDS THROUGH
THE DAY. FRIDAY WILL SEE A WEAKER INVERSION WITH A WARMER START
WHICH WILL ALLOW HUMIDITY TO FALL BELOW 30 PERCENT. A WEAK SLOW
MOVING COLD FRONT WILL MOVE THROUGH FIRE EARLY FRIDAY AFTERNOON
WHICH WILL BRING STRONGER UPSLOPE WINDS TO NORTHWEST FACING SLOPES
BUT STILL GENERALLY LESS THAN 15 MPH. SCATTERED AND SHOWERS AND
THUNDERSTORMS MAY REACH THE FIRE BY FRIDAY NIGHT. BORSUM


.TODAY...

SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....55-60.
MIN HUMIDITY........33-38 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......UPSLOPE WINDS 5 TO 10 MPH.
 RIDGETOP...........NORTHWEST 5 TO 15 MPH.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MIN TEMPERATURE.....36-41.
MAX HUMIDITY........58-63 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 10 MPH.
 RIDGETOP...........WEST 10 TO 20 MPH.

.FRIDAY...

SKY/WEATHER.........MOSTLY SUNNY...AFTERNOON CUMULUS.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....59-64.
MIN HUMIDITY........23-28 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......UPSLOPE 5 TO 10 MPH WITH GUSTS TO
                    15 MPH ON NORTHWESTERLY FACING SLOPES.
 RIDGETOP...........WEST 10 TO 20 MPH.

$$
FORECASTER...BORSUM
REQUESTED BY...MARVIN MATTHIESEN
TYPE OF REQUEST...WILDFIRE
.TAG 20110915.RESER.01/BYZ