FNUS75 KRIW 302116
FWSRIW

SPOT FORECAST FOR WEST SLOPE RX...IA CDC
NATIONAL WEATHER SERVICE RIVERTON WY
316 PM MDT FRI MAR 30 2012

FORECAST IS BASED ON IGNITION TIME OF 1100 MDT ON MARCH 31.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

BREEZY WINDS TONIGHT WITH MUCH WARMER CONDITIONS EXPECTED
SATURDAY AS HIGH PRESSURE REMAINS OVER THE BURN AREA. SOUTHERLY WINDS
WILL INCREASE SATURDAY AHEAD OF AN APPROACHING PACIFIC STORM
SYSTEM. LOWER HUMIDITY IS ALSO EXPECTED AS TEMPERATURES RANGE FROM
5 TO 10 DEGREES HIGHER THAN TODAYS HIGHS. NEAR CRITICAL RH LEVELS
AND STRONG WINDS WILL COUPLE TO CREATE POTENTIALLY HAZARDOUS FIRE
BEHAVIOR. SUNDAY AND MONDAY WILL BE A BIT LESS WINDY WITH HIGHER
RH DUE TO COOLER TEMPERATURES ASSOCIATED WITH A TROUGH OF LOW
PRESSURE OVERHEAD.


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

FORECASTER...BERC

.TONIGHT...
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT).
MIN TEMPERATURE.....43-46.
MAX HUMIDITY........56-59 PERCENT.
20 FOOT WINDS.......SOUTH WINDS AROUND 13 MPH WITH GUSTS TO AROUND
                    25 MPH EARLY IN THE EVENING BECOMING
                    SOUTH 10 TO 12 MPH GUSTING TO 25 MPH AFTER MIDNIGHT.
RIDGE TOP WINDS.....SOUTH 15 TO 20 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4000-5000 FT AGL DECREASING TO 2400-2900 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTH 18 TO 25 MPH.
SMOKE DISPERSAL.....FAIR TO GOOD (51500-96300 KNOT-FT).

.SATURDAY...
SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT).
MAX TEMPERATURE.....76-79.
MIN HUMIDITY........15-18 PERCENT.
20 FOOT WINDS.......SOUTH WINDS 18 TO 23 MPH. GUSTS UP TO 35 MPH
                    INCREASING TO 40 MPH IN THE AFTERNOON.
RIDGE TOP WINDS.....SOUTH 25 TO 30 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3000-4000 FT AGL INCREASING TO 5900-6900 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTH 29 TO 38 MPH.
SMOKE DISPERSAL.....GOOD (88900 KNOT-FT) INCREASING TO EXCELLENT
                    (179900 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY NIGHT...PARTLY CLOUDY. LOWS IN THE MID 40S. SOUTH WINDS
AROUND 15 MPH.
.SUNDAY...COOLER. MOSTLY CLOUDY. ISOLATED SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON. LOWS IN THE LOWER 30S. HIGHS IN
THE LOWER 60S. WEST WINDS AROUND 12 MPH.
.MONDAY...PARTLY CLOUDY. LOWS IN THE MID 30S. HIGHS IN THE LOWER
50S. WINDS GENERALLY LESS THAN 10 MPH.
.TUESDAY...WARMER. MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN
THE MID 60S. WINDS GENERALLY LESS THAN 10 MPH.
.WEDNESDAY...PARTLY CLOUDY. LOWS IN THE MID 40S. HIGHS IN THE
LOWER 70S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...BERC
REQUESTED BY...WENGERT
REASON FOR REQUEST...PRESCRIBED
.TAG 20120331.WESTS.01/RIW