FNUS75 KBYZ 070941
FWSBYZ

SPOT FORECAST FOR UNIT 8A RX...GALLATIN NF
NATIONAL WEATHER SERVICE BILLINGS MT
341 AM MDT TUE MAY 7 2013

FORECAST IS BASED ON IGNITION TIME OF 1100 MDT ON MAY 07.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

SUNNY CONDITIONS THIS MORNING WITH WINDS TURNING UPSLOPE/VALLEY
AROUND 11 AM. ISOLATED SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER
SURROUNDING HIGHER TERRAIN THIS AFTERNOON. A COLD FRONT WILL MOVE
THROUGH THE FIRE AREA AROUND 7 PM WITH NORTHERLY WINDS GUSTING TO
25 MPH AT TIMES THROUGH THE EVENING. SCATTERED SHOWERS AND
THUNDERSTORMS EXPECTED ALONG AND BEHIND THE FRONT. TOMORROW WILL
BE SLIGHTLY COOLER WITH HIGHER RH VALUES. SCATTERED SHOWERS AND
THUNDERSTORMS EXPECTED ESPECIALLY IN THE AFTERNOON AND EVENING.
CHAMBERS

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY IN THE MORNING BECOMING PARTLY
                    CLOUDY IN THE AFTERNOON. ISOLATED SHOWERS AND
                    THUNDERSTORMS IN THE AFTERNOON.
CWR.................10 PERCENT.
LAL.................2...1 TO 8 STRIKES/15 MIN/CELL.
MAX TEMPERATURE.....72-76.
MIN HUMIDITY........22-27 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......DOWNSLOPE/VALLEY 4 TO 8 MPH...BECOMING UPSLOPE/VALLEY
                    8 TO 14 MPH AROUND 11 AM. GUSTY AND ERRATIC WINDS
                    EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON.
 RIDGETOP...........NORTHWEST 5 TO 15 MPH.
MIXING HEIGHT.......8900 FT AGL.
MIXING WINDS........NORTHWEST 5 TO 10 MPH.
HAINES INDEX........5.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY. SCATTERED SHOWERS AND
                    THUNDERSTORMS IN THE EVENING...THEN ISOLATED
                    RAIN SHOWERS OVERNIGHT.
CWR.................20 PERCENT.
LAL.................3...9 TO 15 STRIKES/15 MIN/CELL.
MIN TEMPERATURE.....37-42.
MAX HUMIDITY........85-90 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTH WINDS 8 TO 15 MPH...GUSTS TO 25 MPH IN THE
                    EVENING. GUSTY AND ERRATIC WINDS EXPECTED NEAR
                    THUNDERSTORMS IN THE EVENING.
 RIDGETOP...........NORTH 15 TO 25 MPH.
MIXING HEIGHT.......2000 FT AGL.
MIXING WINDS........NORTH 15 TO 25 MPH.
HAINES INDEX........4.

.WEDNESDAY...

SKY/WEATHER.........PARTLY SUNNY. ISOLATED RAIN SHOWERS IN THE
                    MORNING...THEN SCATTERED SHOWERS AND
                    THUNDERSTORMS IN THE AFTERNOON.
CWR.................25 PERCENT.
LAL.................3...9 TO 15 STRIKES/15 MIN/CELL.
MAX TEMPERATURE.....65-70.
MIN HUMIDITY........29-35 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTH WINDS 8 TO 15 MPH. GUSTY AND ERRATIC WINDS
                    EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON.
 RIDGETOP...........NORTHEAST 10 TO 20 MPH.
MIXING HEIGHT.......7400 FT AGL.
MIXING WINDS........NORTHEAST 10 TO 15 MPH.
HAINES INDEX........5.

$$
FORECASTER...CHAMBERS
REQUESTED BY...DAVID DAY
TYPE OF REQUEST...PRESCRIBED
.TAG 20130507.UNIT8.01/BYZ