FNUS75 KRIW 121937
FWSRIW

SPOT FORECAST FOR WASHAKIE ASPEN UNIT 2...USFS SHF
NATIONAL WEATHER SERVICE RIVERTON WY
137 PM MDT MON MAR 12 2012

FORECAST IS BASED ON IGNITION TIME OF 1320 MDT ON MARCH 12.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

A RIDGE OF HIGH PRESSURE IS EXPECTED TO LEAVE GENERALLY BENIGN
CONDITIONS OVER THE BURN SITE THROUGH THIS EVENING...THOUGH WIND IS
EXPECTED TO INCREASE THIS AFTERNOON. WARMING TEMPERATURES AND
HUMIDITY DECREASING POTENTIALLY INTO THE UPPER TEENS IS POSSIBLE
ACROSS THE BURN SITE TOMORROW. MEANWHILE...AN APPROACHING AREA OF
LOW PRESSURE WILL IMPACT CENTRAL WYOMING TONIGHT. THIS SYSTEM WILL
RESULT IN A TIGHTENED PRESSURE GRADIENT OVER THE BURN SITE...WHICH
IS FAVORABLE FOR THE DEVELOPMENT OF STRONG WIND. THIS STRONGER WIND
WILL CONTINUE THROUGH TUESDAY MORNING...WITH THE STRONGEST WIND
ANTICIPATED FROM TUESDAY EARLY AFTERNOON THROUGH THE EVENING.
DURING THIS TIME FRAME...SURFACE WIND MAY GUST TO AROUND 70 MPH.
WIND WILL WEAKEN BEGINNING EARLY TUESDAY EVENING...THOUGH WIND
WILL REMAIN GUSTY THROUGH THE OVERNIGHT HOURS.

...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS...
...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT...

FORECASTER...BRANHAM

.TODAY...
SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT).
MAX TEMPERATURE.....46-51.
MIN HUMIDITY........27-30 PERCENT.
20 FOOT WINDS.......BREEZY. SOUTH-SOUTHWEST WIND AROUND 10 MPH
                    BECOMING SOUTHWEST WINDS 15 TO 20 MPH BY 1500.
                    GUSTS UP TO 35 MPH.
RIDGE TOP WINDS.....SOUTHWEST 25 TO 30 MPH.
MIXING HEIGHT.......INCREASING TO AROUND 3800 FT AGL.
TRANSPORT WINDS.....NORTH 25 TO 30 MPH.
SMOKE DISPERSAL.....GOOD (90600-91800 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT).
MIN TEMPERATURE.....30-34.
MAX HUMIDITY........50-55 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS 18 TO 22 MPH. GUSTS UP TO 35
                    MPH INCREASING TO 45 MPH AFTER 0200.
RIDGE TOP WINDS.....SOUTHWEST 30 TO 35 MPH.
MIXING HEIGHT.......3000-3800 FT AGL.
TRANSPORT WINDS.....NORTH 28 TO 30 MPH.
SMOKE DISPERSAL.....GOOD (87400-89300 KNOT-FT).

.TUESDAY...
SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT).
MAX TEMPERATURE.....52-56.
MIN HUMIDITY........17-21 PERCENT.
20 FOOT WINDS.......WINDY. SOUTHWEST WINDS 29 TO 35 MPH. GUSTS UP
                    OF 50 TO 60 MPH EXPECTED...WITH SOME PERIODS
                    OF GUSTS UP TO 70 POSSIBLE...ESPECIALLY AFTER
                    1000.
RIDGE TOP WINDS.....SOUTHWEST AROUND 40 MPH INCREASING TO 45 TO 50
                    MPH BY 1100.
MIXING HEIGHT.......INCREASING TO AROUND 4000 FT AGL BY 1400.
TRANSPORT WINDS.....NORTH AROUND 37 MPH INCREASING TO 44 TO 51 MPH
                    BY 1100.
SMOKE DISPERSAL.....VERY GOOD TO EXCELLENT (113600-150500 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.TUESDAY NIGHT...WINDY. PARTLY CLOUDY. LOWS IN THE LOWER 30S.
SOUTHWEST WINDS AROUND 32 MPH.
.WEDNESDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN AND SNOW.
LOWS IN THE LOWER 30S. HIGHS AROUND 50. SOUTHWEST WINDS AROUND
14 MPH.
.THURSDAY...PARTLY CLOUDY. LOWS IN THE LOWER 30S. HIGHS IN THE
LOWER 50S. SOUTHWEST WINDS AROUND 12 MPH.
.FRIDAY...PARTLY CLOUDY. CHANCE OF SHOWERS AND SNOW SHOWERS. LOWS
AROUND 30. HIGHS IN THE LOWER 50S. SOUTHWEST WINDS AROUND 16 MPH.

$$

FORECASTER...BRANHAM
REQUESTED BY...JACOB BINNS
REASON FOR REQUEST...PRESCRIBED
.TAG 20120312.WASHA.01/RIW