FNUS75 KRIW 100215
FWSRIW

SPOT FORECAST FOR WEST SLOPE RX...BLM
NATIONAL WEATHER SERVICE RIVERTON WY
815 PM MDT MON APR 9 2012

FORECAST IS BASED ON IGNITION TIME OF 1100 MDT ON APRIL 10.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...AN AMPLIFYING RIDGE OF HIGH PRESSURE WILL RESULT IN A CONTINUATION
OF WARM AND DRY WEATHER TODAY. THE MINIMUM RELATIVE HUMIDITY
WILL DROP TO THE UPPER TEENS THIS AFTERNOON. A PACIFIC TROUGH WILL
APPROACH THE AREA WEDNESDAY. IN RESPONSE TO THIS THE SURFACE PRESSURE
GRADIENT WILL INCREASE RESULTING IN INCREASED SOUTH SOUTHEAST WINDS.
THIS IN COMBINATION WITH A MINIMUM RELATIVE HUMIDITY IN THE MID TEENS...
CRITICAL FIRE WEATHER CONDITIONS COULD OCCUR WEDNESDAY.
SHOWERS FROM THE TROUGH WILL SPREAD EAST INTO THE AREA WEDNESDAY NIGHT.

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

FORECASTER...LIPSON

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT).
MAX TEMPERATURE.....65-67.
MIN HUMIDITY........17-18 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 3 TO 5 INCREASING TO 5-9 MPH AFTER 1000.
RIDGE TOP WINDS.....EAST AROUND 15 MPH SHIFTING TO THE SOUTHWEST IN
                    THE LATE MORNING AND AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......4400-5400 FT AGL INCREASING TO 6200-7200 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 8 TO 13 MPH.
SMOKE DISPERSAL.....GOOD (80600-93600 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).
MIN TEMPERATURE.....AROUND 40.
MAX HUMIDITY........47 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY FROM THE NORTHEAST AT 4-7 MPH.
RIDGE TOP WINDS.....SOUTH AROUND 10 MPH SHIFTING TO THE EAST IN THE
                    LATE EVENING AND OVERNIGHT.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......4200-5200 FT AGL DECREASING TO 1500-2500 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTH 7 TO 13 MPH.
SMOKE DISPERSAL.....POOR (19200-38900 KNOT-FT).

.WEDNESDAY...
SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT).
MAX TEMPERATURE.....74-76.
MIN HUMIDITY........15 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING SOUTH AROUND
                    11 MPH BY 1200 AND 11 TO 17 MPH BY 1500.
RIDGE TOP WINDS.....SOUTH 15 TO 20 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2200-3200 FT AGL INCREASING TO 6300-7300 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTH 12 TO 18 MPH INCREASING TO AROUND 25 MPH
                    LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (33100 KNOT-FT) INCREASING TO VERY GOOD
                    (115900 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY NIGHT...PARTLY CLOUDY. CHANCE OF SHOWERS AND ISOLATED
THUNDERSTORMS IN THE EVENING...THEN CHANCE OF SHOWERS AFTER
MIDNIGHT. LOWS IN THE LOWER 40S. WINDS GENERALLY LESS THAN
10 MPH.
.THURSDAY...COOLER. MOSTLY CLOUDY WITH CHANCE OF SHOWERS WITH
POSSIBLE SNOW SHOWERS AND THUNDERSTORMS. LOWS IN THE MID 30S.
HIGHS IN THE MID 50S. WINDS GENERALLY LESS THAN 10 MPH.
.FRIDAY...MOSTLY CLOUDY. CHANCE OF SHOWERS AND SNOW SHOWERS. LOWS
IN THE MID 30S. HIGHS IN THE LOWER 50S. WINDS GENERALLY LESS THAN
10 MPH.
.SATURDAY...MOSTLY CLOUDY WITH CHANCE OF SHOWERS AND SNOW
SHOWERS. LOWS IN THE LOWER 30S. HIGHS IN THE MID 40S. WINDS
GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...LIPSON
REQUESTED BY...WENGERT
REASON FOR REQUEST...PRESCRIBED
.TAG 20120410.WESTS.01/RIW