FNUS75 KBYZ 231358
FWSBYZ

SPOT FORECAST FOR BLACK SPRINGS RX UNITS 7   11...NORTHERN CHEYENNE
NATIONAL WEATHER SERVICE BILLINGS MT
758 AM MDT FRI OCT 23 2009

FORECAST IS BASED ON IGNITION TIME OF 1100 MDT ON OCTOBER 23.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

SUNNY CONDITIONS THIS MORNING WITH LIGHT SOUTH TO SOUTHWEST
WINDS. BY THIS AFTERNOON CLOUD COVER WILL INCREASE AND WINDS WILL
MIX OUT TO THE WEST WITH OCCASIONAL GUSTS TO 25 MPH. ANY
PRECIPITATION SHOULD HOLD OFF UNTIL THIS EVENING. RELATIVE
HUMIDITIES SHOULD DROP INTO THE LOWER 30S THIS AFTERNOON...AND
COULD GO LOWER DEPENDING ON HOW QUICKLY WESTERLY WINDS DEVELOP
THIS AFTERNOON. WINDS WILL INCREASE SIGNIFICANTLY TONIGHT AT
RIDGETOP ELEVATION AS ANOTHER STORM SYSTEM APPROACHES. SATURDAY
WILL BE VERY WINDY WITH SCATTERED SHOWERS AND HIGHER RELATIVE
HUMIDITIES. CHAMBERS

.TODAY...

SKY/WEATHER.........INCREASING CLOUDS IN THE AFTERNOON.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....55-60.
MIN HUMIDITY........30-35 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHWEST WINDS 4 TO 8 MPH...BECOMING WEST 8 TO 15 MPH
                    WITH OCCASIONAL GUSTS TO 25 MPH IN THE AFTERNOON.
 RIDGETOP...........SOUTHWEST 8 TO 12 MPH...BECOMING WEST 15 TO 25 MPH
                    IN THE AFTERNOON.
MIXING HEIGHT.......6000FT AGL.
MIXING WINDS........WEST 10 TO 20 MPH.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY. ISOLATED RAIN SHOWERS OVERNIGHT.
CWR.................10 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MIN TEMPERATURE.....38-42.
MAX HUMIDITY........80-85 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......WEST WINDS 10 TO 20 MPH.
 RIDGETOP...........WEST 15 TO 25 MPH....WITH GUSTS TO 40 MPH.
MIXING HEIGHT.......1000 FT AGL.
MIXING WINDS........WEST 25 TO 40 MPH.

.SATURDAY...

SKY/WEATHER.........MOSTLY CLOUDY WITH SCATTERED RAIN SHOWERS.
CWR.................30 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....46-51.
MIN HUMIDITY........45-52 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......WEST WINDS 15 TO 25 MPH WITH GUSTS TO 40 MPH.
 RIDGETOP...........NORTHWEST 20 TO 35 MPH WITH GUSTS TO 50 MPH.
MIXING HEIGHT.......6000 FT AGL.
MIXING WINDS........NORTHWEST 30 TO 45 MPH.

$$
FORECASTER...CHAMBERS
REQUESTED BY...LEE OLD BEAR
TYPE OF REQUEST...PRESCRIBED
.TAG 20091023.BLACK.01/BYZ