FNUS75 KRIW 111457
FWSRIW

SPOT FORECAST FOR NORTH FORK PILES...WY-SHF
NATIONAL WEATHER SERVICE RIVERTON WY
857 AM MDT TUE MAY 11 2010

FORECAST IS BASED ON IGNITION TIME OF 0805 MDT ON MAY 11.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...A STRONG LOW PRESSURE CENTER WILL TRACK EAST NORTHEAST
ACROSS SOUTHEAST WYOMING THROUGH WEDNESDAY. RAIN CURRENTLY FALLING FROM THIS LOW
WILL TURN TO SNOW BY 1000. A CHANCE OF SNOW WILL CONTINUE THROUGH WEDNESDAY NIGHT.
A SLIGHT CHANCE OF PRECIPITATION WILL OCCUR THROUGH THE LADDER PORTION
OF THE WEEK WHEN A SECONDARY CIRCULATION ROTATES AROUND THE BACKSIDE OF
THE MAIN LOW ALONG WITH MOSTLY CLOUDY CONDITIONS...COOL AND RELATIVELY HIGH RH
CONTINUING.

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

FORECASTER...LIPSON

.TODAY...
SKY/WEATHER.........CLOUDY (90-100 PERCENT). RAIN TURNING TO SNOW BY 10 AM.
MAX TEMPERATURE.....39 AROUND MID DAY THEN STEADY OR FALLING TEMPERATURES
                    THROUGH THE AFTERNOON.
MIN HUMIDITY........82 PERCENT.
WIND (20 FT)........WINDS BECOMING EAST 12 TO 13 MPH BY 1000
                    WITH OCCASIONAL GUSTS TO AROUND 25 MPH BY 1100.
RIDGE TOP WINDS.....EAST 20 TO 25 MPH INCREASING TO AROUND 30 MPH
                    LATE IN THE AFTERNOON.
LAL.................1.
CWR.................49 PERCENT.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......1400-2400 FT AGL.
TRANSPORT WINDS.....EAST 17 TO 26 MPH INCREASING TO AROUND 29 MPH
                    LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR TO FAIR (27700-53700 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........CLOUDY (85-95 PERCENT). CHANCE OF SNOW.
MIN TEMPERATURE.....AROUND 30.
MAX HUMIDITY........90-93 PERCENT.
WIND (20 FT)........EAST WINDS 12 TO 15 MPH WITH GUSTS TO
                    AROUND 25 MPH.
RIDGE TOP WINDS.....EAST 25 TO 30 MPH DECREASING TO AROUND 20
                    MPH EARLY IN THE MORNING.
LAL.................1.
CWR.................42 PERCENT.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......1400-2400 FT AGL.
TRANSPORT WINDS.....NORTHEAST 21 TO 29 MPH.
SMOKE DISPERSAL.....POOR TO FAIR (30800-55200 KNOT-FT).

.WEDNESDAY...
SKY/WEATHER.........CLOUDY (85-95 PERCENT). CHANCE OF SNOW. 3 TO 5 INCHES OF SNOW
                    POSSIBLE BY THE END OF WEDNESDAY WITH MOST OF THAT SNOW
                    EXPECTED THIS AFTERNOON AND THIS EVENING.
MAX TEMPERATURE.....38.
MIN HUMIDITY........72 PERCENT.
WIND (20 FT)........EAST WINDS 10 TO 12 MPH UNTIL LATE
                    AFTERNOON DECREASING TO 5 MPH BY 1600.
RIDGE TOP WINDS.....NORTHEAST AROUND 15 MPH INCREASING TO 20 TO 25
                    MPH IN THE LATE MORNING AND EARLY
                    AFTERNOON...THEN DECREASING TO AROUND 15 MPH
                    LATE IN THE AFTERNOON.
LAL.................1.
CWR.................21 PERCENT.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2100-3100 FT AGL.
TRANSPORT WINDS.....NORTHEAST 15 TO 23 MPH.
SMOKE DISPERSAL.....POOR TO FAIR (33800-46000 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY NIGHT...MOSTLY CLOUDY. CHANCE OF SNOW IN THE EVENING...
THEN SLIGHT CHANCE OF SNOW AFTER MIDNIGHT. LOWS IN THE MID 20S.
WINDS GENERALLY LESS THAN 10 MPH.
.THURSDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND SNOW
SHOWERS. LOWS IN THE UPPER 20S. HIGHS IN THE LOWER 50S. WINDS
GENERALLY LESS THAN 10 MPH.
.FRIDAY...PARTLY CLOUDY WITH ISOLATED SHOWERS...THUNDERSTORMS AND
SNOW SHOWERS. LOWS IN THE UPPER 20S. HIGHS IN THE UPPER 50S.
WINDS GENERALLY LESS THAN 10 MPH.
.SATURDAY...PARTLY CLOUDY. LOWS IN THE LOWER 30S. HIGHS AROUND
60. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...LIPSON
REQUESTED BY...CLINT DAWSON
REASON FOR REQUEST...PRESCRIBED
.TAG 20100511.NORTH.01/RIW