FNUS75 KRIW 201030
FWSRIW

SPOT FORECAST FOR NORTH LITTLE MTN RX...USFS SHF
NATIONAL WEATHER SERVICE RIVERTON WY
430 AM MDT WED MAR 20 2013

FORECAST IS BASED ON IGNITION TIME OF 1200 MDT ON MARCH 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...A VERY DRY AIRMASS EARLY THIS MORNING WILL GIVE WAY
TO A RAPID INCREASE IN MID AND HIGH LEVEL CLOUDS AND SOME
DEWPOINT RECOVERY THROUGH THE DAY. A TROUGH OF LOW PRESSURE WILL
MAKE LANDFALL ALONG THE NW COAST THIS MORNING WITH PRESSURES
CONTINUING TO FALL RAPIDLY EAST OF THE DIVIDE AHEAD OF THIS
SYSTEM...SOUTHERLY WINDS PREVAILING THROUGH THE DAY. A STRONG COLD
FRONT WILL PUSH ACROSS THE AREA SHORTLY BEFORE SUNRISE THURSDAY
MORNING...BRINGING A SHARP WIND SHIFT FROM THE NORTH WITH RAIN
QUICKLY CHANGING TO SNOW BEHIND THE FRONT THURSDAY MORNING.

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

FORECASTER...MEUNIER

.TODAY...
SKY/WEATHER.........CLOUDY (80-100 PERCENT).
MAX TEMPERATURE.....48-51.
MIN HUMIDITY........23-26 PERCENT.

20 FOOT WINDS.......SOUTH WINDS AROUND 10 MPH WITH GUSTS 15 TO 20 MPH.
RIDGE TOP WINDS.....SOUTHWEST AROUND 15 MPH.

MIXING HEIGHT.......NEAR 6000 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 13 TO 21 MPH.
SMOKE DISPERSAL.....FAIR IN THE MORNING...GOOD AFTER NOON (44600-78000 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). INCREASING CHANCE OF
                    RAIN AND SNOW AFTER MIDNIGHT.
MIN TEMPERATURE.....30-33.
MAX HUMIDITY........71-74 PERCENT.

20 FOOT WINDS.......SOUTH WINDS 10 TO 15 MPH WITH GUSTS 15 TO 20 MPH...SHIFTING
                    FROM THE NORTH NORTHWEST AROUND 6 AM.
RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH BECOMING NORTHWEST AROUND 6 AM.

MIXING HEIGHT.......3900-4900 FT AGL.
TRANSPORT WINDS.....WEST 17 TO 21 MPH.
SMOKE DISPERSAL.....FAIR TO GOOD (52500-93800 KNOT-FT).

.THURSDAY...
SKY/WEATHER.........CLOUDY (80-90 PERCENT). RAIN CHANGING TO SNOW IN THE
                    MORNING...NUMEROUS SNOW SHOWERS IN THE AFTERNOON.
MAX TEMPERATURE.....36-39.
MIN HUMIDITY........39-42 PERCENT.

20 FOOT WINDS.......NORTH 12 TO 17 MPH WITH GUSTS NEAR 30 MPH.
RIDGE TOP WINDS.....NORTHWEST AROUND 25 MPH IN THE MORNING...DECREASING
                    TO AROUND 10 MPH IN THE AFTERNOON.

MIXING HEIGHT.......3900 FT AGL INCREASING TO 6200 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....NORTHWEST 18 TO 22 MPH.
SMOKE DISPERSAL.....GOOD (62100 KNOT-FT) INCREASING TO VERY GOOD
                    (117000 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.THURSDAY NIGHT...COLDER. MOSTLY CLOUDY WITH CHANCE OF SNOW
SHOWERS. LOWS IN THE LOWER 20S. WINDS GENERALLY LESS THAN 10 MPH.

.FRIDAY...MOSTLY CLOUDY WITH CHANCE OF SNOW SHOWERS. LOWS AROUND
17. HIGHS IN THE LOWER 30S. WINDS GENERALLY LESS THAN 10 MPH.

.SATURDAY...PARTLY CLOUDY WITH CHANCE OF SNOW. LOWS AROUND 16.
HIGHS IN THE UPPER 20S. WINDS GENERALLY LESS THAN 10 MPH.

.SUNDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SNOW. LOWS AROUND
17. HIGHS IN THE UPPER 20S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...MEUNIER
REQUESTED BY...MONONI
REASON FOR REQUEST...PRESCRIBED
.TAG 20130320.NORTH.01/RIW