FNUS75 KBYZ 041441
FWSBYZ

SPOT FORECAST FOR PICKET PIN RX...BILLINGS DISPATCH CENTER
NATIONAL WEATHER SERVICE BILLINGS MT
841 AM MDT WED APR 4 2012

FORECAST IS BASED ON IGNITION TIME OF 0830 MDT ON APRIL 04.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS
EVENING BELOW 6000 FEET...

.DISCUSSION...
SOUTHWEST WINDS AT THE BURN SITE WILL INCREASE IN SPEED DURING THE
MORNING...BUT ARE NOT EXPECTED TO BE AT THEIR STRONGEST UNTIL THIS
AFTERNOON...WHEN SOME GUSTS TO 35 MPH ARE EXPECTED. EXPOSED PLACES
WILL HAVE THE STRONGEST WINDS. THIS MAY RESULT IN SOME EASTERLY...
EDDYING WINDS ON THE MIDDLE AND UPPER PARTS OF THE UNIT 2 RIDGE. A
COLD FRONT WILL MOVE THROUGH THE BURN SITE THIS EVENING...WITH THE
PASSAGE LIKELY BETWEEN 8 PM AND 11 PM. A PERIOD OF WEST-NORTHWEST
WINDS WITH GUSTS OVER 30 MPH IS LIKELY. THE RIDGE OF UNIT 1 MAY BE
MOST EXPOSED TO THESE WEST-NORTHWEST WINDS. WINDS WILL DECREASE BY
MORNING.

RAIN OR SNOW WILL BEGIN ON THURSDAY AND CONTINUE INTO FRIDAY. THE
BURN SITE WILL LIKELY RECEIVE SEVERAL INCHES OF SNOW ACCUMULATION.
SCHULTZ/TWH

.TODAY...

SKY/WEATHER.........PARTLY SUNNY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....60-65.
MIN HUMIDITY........19-24 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 9 MPH THROUGH THE MID
                    MORNING...INCREASING TO 9 TO 14 MPH WITH
                    SOME GUSTS TO 25 MPH BY NOON. WINDS DURING
                    THE AFTERNOON WILL BE SOUTHWEST AT 15 TO 25
                    MPH WITH SOME GUSTS TO 35 MPH...MAINLY OVER
                    EXPOSED AREAS. SOME EASTERLY...EDDYING WINDS
                    MAY OCCUR ON THE MIDDLE AND UPPER PARTS OF
                    THE UNIT 2 RIDGE.
 RIDGETOP...........SOUTHWEST15 TO 30 MPH.
MIXING HEIGHT.......8000 FT AGL.
MIXING WINDS........SOUTHWEST 10 TO 20 MPH THIS MORNING...AND
                    15 TO 25 MPH THIS AFTERNOON.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS AND
                    THUNDERSTORMS.
CWR.................13 PERCENT.
LAL.................2...1 TO 8 STRIKES/15 MIN/CELL.
MIN TEMPERATURE.....28-33.
MAX HUMIDITY........79-84 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHWEST WINDS 15 TO 25 MPH SHIFTING TO THE
                    WEST-NORTHWEST BETWEEN 8 PM AND 11 PM. THE
                    RIDGE OF UNIT 1 MAY BE MOST EXPOSED TO THESE
                    WEST-NORTHWEST WINDS...WHICH COULD GUST OVER
                    30 MPH FOR A TIME. THE WINDS WILL DECREASE TO
                    7 TO 13 MPH BY MORNING.
 RIDGETOP...........SOUTHWEST 25 TO 40 MPH.
MIXING HEIGHT.......3500 FT AGL.
MIXING WINDS........SOUTHWEST 15 TO 30 MPH.

.THURSDAY...

SKY/WEATHER.........MOSTLY CLOUDY. SCATTERED RAIN SHOWERS AND SNOW
                    SHOWERS IN THE MORNING...THEN NUMEROUS RAIN OR
                    SNOW SHOWERS IN THE AFTERNOON.
CWR.................30 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....40-45.
MIN HUMIDITY........53-58 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTH-NORTHEAST WINDS 6 TO 11 MPH.
 RIDGETOP...........SOUTHWEST 5 TO 10 MPH.
MIXING HEIGHT.......3000 FT AGL.
MIXING WINDS........NORTH-NORTHEAST 5 TO 10 MPH.

$$
FORECASTER...SCHULTZ/HUMPHREY
REQUESTED BY...MARK HEPPLER
TYPE OF REQUEST...PRESCRIBED
.TAG 20120404.PICKE.01/BYZ