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285
FNUS75 KBYZ 231506
FWSBYZ

SPOT FORECAST FOR TWIN BUTTES 3...USFS BIGHORN NF
NATIONAL WEATHER SERVICE BILLINGS MT
906 AM MDT THU OCT 23 2014

FORECAST IS BASED ON IGNITION TIME OF 1200 MDT ON OCTOBER 23.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

CONSIDERABLE CLOUD COVER EXPECTED TODAY...HOWEVER THERE WILL BE A
FEW BREAKS THIS AFTERNOON THAT COULD LAST FOR A COUPLE OF HOURS.
SOUTHWEST WINDS WILL GUST TO 30 MPH AT TIMES TODAY. RH VALUES WILL
BE A BIT HIGHER THAN YESTERDAY. WEAK COLD FRONT MOVES THROUGH
TONIGHT BUT LOOKS DRY. TOMORROW WILL START OUT MOSTLY CLOUDY BUT
CLOUDS WILL DECREASE QUICKLY IN THE AFTERNOON. WINDS WILL BE
TRICKY TOMORROW WITH THE SITE IN BETWEEN LIGHT LOWER ELEVATION
WINDS AND STRONG WINDS AT THE 10000 FOOT ELEVATION. GAVE WINDS ON
THE LIGHT SIDE FOR SUSTAINED BUT WITH POTENTIAL FOR OCCASIONAL
STRONGER GUSTS AS THERMAL AND TERRAIN EFFECTS MAY PULL DOWN SOME
OF THE STRONGER WINDS ALOFT AT TIMES. CHAMBERS

.TODAY...

SKY/WEATHER.........MOSTLY CLOUDY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....54-59.
MIN HUMIDITY........25-30 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHWEST WINDS 10 TO 20 MPH...GUSTS
                    TO 30 MPH.
 RIDGETOP...........WEST 20 TO 35 MPH.
MIXING HEIGHT.......5500 FT AGL.
MIXING WINDS........WEST 15 TO 25 MPH.
HAINES INDEX........2.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MIN TEMPERATURE.....36-41.
MAX HUMIDITY........65-70 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 10 MPH.
 RIDGETOP...........WEST 25 TO 40 MPH.
MIXING HEIGHT.......600 FT AGL.
MIXING WINDS........WEST 15 TO 25 MPH.
HAINES INDEX........2.

.FRIDAY...

SKY/WEATHER.........MOSTLY CLOUDY IN THE MORNING...DECREASING
                    CLOUDS IN THE AFTERNOON.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....52-57.
MIN HUMIDITY........32-40 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 15 MPH...OCCASIONAL
                    GUSTS TO 30 MPH IN THE AFTERNOON.
 RIDGETOP...........WEST 20 TO 35 MPH.
MIXING HEIGHT.......5200 FT AGL.
MIXING WINDS........WEST 10 TO 20 MPH.
HAINES INDEX........2.

$$
FORECASTER...CHAMBERS
REQUESTED BY...ERIC COMSTOCK
TYPE OF REQUEST...PRESCRIBED
.TAG 20141023.TWINB.01/BYZ




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