FNUS75 KBYZ 251310
FWSBYZ

SPOT FORECAST FOR RESERVOIR FIRE...USFS
NATIONAL WEATHER SERVICE BILLINGS MT
710 AM MDT SUN SEP 25 2011

FORECAST IS BASED ON REQUEST TIME OF 0648 MDT ON SEPTEMBER 25.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

...COLD FRONT PASSAGE EARLY MONDAY...

A STRONG UPPER RIDGE OF HIGH PRESSURE WILL BRING WARM AND DRY
CONDITIONS TO THE FIRE TODAY. TEMPERATURES WILL BE IN THE MID
TO UPPER 60S AND MINIMUM RELATIVE HUMIDITIES WILL RANGE FROM THE
LOWER TO MID 20S. WINDS WILL BE WEST 5 TO 10 MPH. A COLD FRONT
WILL APPROACH THE FIRE TONIGHT AND RELATIVE HUMIDITIES WILL RECOVER
INTO THE MID TO UPPER 40S. WINDS WILL BE WEST 5 TO 10 MPH. THE
FRONT WILL MOVE ACROSS THE FIRE MONDAY MORNING BRINGING ISOLATED
RAIN SHOWERS. IT WILL BE COOLER WITH TEMPERATURES IN THE UPPER 50S
TO LOWER 60S AND RELATIVE HUMIDITIES IN THE 20S. WINDS WILL BE WEST
5 TO 15 MPH.

.TODAY...

SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....64-69.
MIN HUMIDITY........21-26 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......WEST WINDS 5 TO 10 MPH.
 RIDGETOP...........SOUTHWEST 5 TO 10 MPH.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MIN TEMPERATURE.....42-47.
MAX HUMIDITY........44-49 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......WEST WINDS 5 TO 10 MPH.
 RIDGETOP...........WEST 5 TO 15 MPH.

.MONDAY...

SKY/WEATHER.........SUNNY WITH ISOLATED RAIN SHOWERS.
CWR.................10 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....58-63.
MIN HUMIDITY........23-28 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......WEST WINDS 5 TO 15 MPH.
 RIDGETOP...........WEST 5 TO 15 MPH.

$$
FORECASTER...ARTHUR
REQUESTED BY...MARVIN MATTHIESEN
TYPE OF REQUEST...WILDFIRE
.TAG 20110925.RESER.01/BYZ