FNUS75 KRIW 271418
FWSRIW

SPOT FORECAST FOR HAMP...FWS SER
NATIONAL WEATHER SERVICE RIVERTON WY
818 AM MDT TUE APR 27 2010

FORECAST IS BASED ON IGNITION TIME OF 0800 MDT ON APRIL 27.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A RIDGE OF HIGH PRESSURE WILL QUICKLY SHIFT EAST OF THE BURN AREA
THIS MORNING. SOUTHWEST SURFACE FLOW WILL INCREASE LATE THIS
MORNING...AHEAD OF A STRONG PACIFIC STORM SYSTEM. MODERATE
SOUTHWEST WIND NEAR MOUNTAIN TOP LEVEL WILL BEGIN TO SURFACE
AROUND 1100 HOURS TODAY. STRONG SOUTHWEST WIND IS ANTICIPATED
DURING THE AFTERNOON THROUGH WEDNESDAY MORNING AHEAD OF A STRONG
SURFACE COLD FRONT...EXPECTED TO MOVE THROUGH THE BURN AREA AROUND
NOON WEDNESDAY.

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

FORECASTER...CHURCH

.TODAY...
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT).
MAX TEMPERATURE.....66-69.
MIN HUMIDITY........14-18 PERCENT.
WIND (20 FT)........SOUTHEAST 2 TO 4 MPH...BECOMING SOUTH 7 TO 11 MPH
                    AFTER 1100...THEN SOUTHWEST 12 TO 16 MPH WITH
                    GUSTS TO 24 MPH AFTER 2000.
RIDGE TOP WINDS.....SOUTHWEST 12-17 MPH IN THE MORNING...BECOMING
                    SOUTHWEST 17 TO 21 MPH WITH GUSTS TO 26 MPH
                    AFTER 2000.
LAL.................1.
CWR.................0 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......9000-11000 FT AGL.
TRANSPORT WINDS.....TRANSPORT WINDS...SOUTHWEST 15 TO 25 MPH.
SMOKE DISPERSAL.....VERY GOOD TO EXCELLENT (135000-275000 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). CHANCE OF RAIN
                    SHOWERS AND SNOW SHOWERS AFTER MIDNIGHT.
MIN TEMPERATURE.....33-36.
MAX HUMIDITY........74-78 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 14 TO 18 MPH WITH GUSTS TO
                    AROUND 24 MPH SHIFTING TO THE WEST 15 TO 20
                    MPH AROUND 0700 WITH GUSTS TO 26 MPH IN THE
                    MORNING.
RIDGE TOP WINDS.....SOUTHWEST 20 TO 30 MPH WITH GUSTS TO 35 MPH.
LAL.................1.
CWR.................10 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......600-1000 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 15 TO 20 MPH.
SMOKE DISPERSAL.....POOR (9000-15000 KNOT-FT).

.WEDNESDAY...
SKY/WEATHER.........CLOUDY (85-95 PERCENT). SNOW SHOWERS LIKELY
                    THROUGH THE DAY. RAIN SHOWERS LIKELY IN THE
                    AFTERNOON.
MAX TEMPERATURE.....39-42.
MIN HUMIDITY........36-40 PERCENT.
WIND (20 FT)........WEST-NORTHWEST 7 TO 12 MPH. GUSTS UP
                    TO 16 MPH DURING THE AFTERNOON.
RIDGE TOP WINDS.....NORTHWEST 15 TO 20 MPH WITH GUSTS TO 25 MPH.
LAL.................1.
CWR.................20 PERCENT.
HAINES INDEX........3 OVER VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......3500 FT AGL.
TRANSPORT WINDS.....NORTHWEST 15 TO 25 MPH.
SMOKE DISPERSAL.....FAIR TO GOOD (52500-87500 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY NIGHT...COLDER. MOSTLY CLOUDY WITH CHANCE OF SNOW
SHOWERS. LOWS IN THE LOWER 20S. NORTHWEST WINDS AROUND 15 MPH.
.THURSDAY...CLOUDY WITH CHANCE OF SNOW SHOWERS. LOWS IN THE MID
20S. HIGHS IN THE UPPER 30S. WEST WINDS AROUND 15 MPH.
.FRIDAY...MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND SNOW
SHOWERS. LOWS IN THE MID 20S. HIGHS IN THE LOWER 40S. WEST WINDS
AROUND 15 MPH.
.SATURDAY...PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND SNOW
SHOWERS. LOWS IN THE MID 20S. HIGHS IN THE MID 40S. NORTHWEST
WINDS AROUND 10 MPH.

$$

FORECASTER...CHURCH
REQUESTED BY...TRACY SWENSON
REASON FOR REQUEST...PRESCRIBED
.TAG 20100427.HAMP_.02/RIW