FNUS75 KRIW 110146
FWSRIW

SPOT FORECAST FOR LAVA RX...NPS
NATIONAL WEATHER SERVICE RIVERTON WY
746 PM MDT TUE APR 10 2012

FORECAST IS BASED ON IGNITION TIME OF 1740 MDT ON APRIL 10.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...TODAY (WEDNESDAY) WILL START OUT DRY THROUGH NOON.
THEN DURING THE AFTERNOON SHOWERS WILL DEVELOP OVER THE HIGHER
MOUNTAINS AND MOVE NORTH THROUGH SUNSET. ISOLATED THUNDERSTORMS
CANNOT BE RULED OUT FROM 200 PM UNTIL 800 PM. THE WIND WILL INCREASE
IN THE AFTERNOON AHEAD OF A APPROACHING COLD FRONT. THIS FRONT WILL
MOVE THROUGH THE BURN AREA BETWEEN 600 PM AND 900 PM THIS EVENING.
COLDER AIR WILL MOVE IN AND CHANGE RAIN SHOWERS TO SNOW SHOWERS
NEAR OR AFTER MIDNIGHT. THEN THURSDAY LOOKS COLDER WITH A CHANCE
OR RAIN OR SNOW SHOWERS. CONDITIONS MAY BECOME UNSTABLE ENOUGH
THURSDAY AFTERNOON FOR ISOLATED THUNDERSTORMS UNTIL SUNSET.

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

FORECASTER...AR

.TODAY (WEDNESDAY)...
SKY/WEATHER.........PARTLY CLOUDY IN THE MORNING.  THEN INCREASING
                    CLOUDS. ISOLATED SHOWERS AND THUNDERSTORMS AFTER
                    1400.
MAX TEMPERATURE.....60-65.
MIN HUMIDITY........18-24 PERCENT.

20 FOOT WINDS.......VARIABLE AT 3 TO 6 MPH UNTIL 1200.
                    THEN SOUTH TO SOUTHWEST AT 7 TO 12 MPH WITH GUSTS
                    TO 17 MPH AFTER 1300.  ERRATIC WIND GUSTS NEAR
                    SHOWERS AND STORMS UP TO 30 MPH.

RIDGE TOP WINDS.....VARIABLE AT 4 TO 7 MPH UNTIL 1200.
                    THEN SOUTH TO SOUTHWEST AT 10 TO 15 MPH WITH GUSTS
                    AROUND 20 MPH AFTER 1300.  ERRATIC WIND GUSTS NEAR
                    SHOWERS OR STORMS TO 35 MPH.

LAL.................1 UNTIL 1200...THEN 2.
CHC OF WETTING RAIN.3 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......INCREASING TO 5500-6000 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTH AT 5 TO 10 MPH UNTIL 1200.
                    THEN SOUTH AT 15 TO 20 MPH AFTER 1200.
SMOKE DISPERSAL.....POOR...BECOMING FAIR BY 1100...BECOMING GOOD BY 1400.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF RAIN SHOWERS UNTIL 2200.
                    ISOLATED THUNDERSTORMS UNTIL 2000. A CHANCE OF SNOW
                    SNOW SHOWERS AFTER 2200.
MIN TEMPERATURE.....29-33.
MAX HUMIDITY........88-93 PERCENT.

20 FOOT WINDS.......SOUTHWEST TO WEST AT 5 TO 10 MPH...GUSTS TO 15 MPH.

RIDGE TOP WINDS.....SOUTHWEST TO WEST AT 10 TO 15 MPH...GUSTS TO 20 MPH.

LAL.................2 UNTIL 2000...THEN 1.
CHC OF WETTING RAIN.21 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......DECREASING TO 1500 FT AGL AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTHWEST AT 20 MPH.
SMOKE DISPERSAL.....BECOMING FAIR BY 2000...BECOMING POOR AFTER MIDNIGHT.

.THURSDAY...
SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SNOW SHOWERS IN THE
                    MORNING...THEN A CHANCE OF RAIN OR SNOW SHOWERS
                    IN THE AFTERNOON. ISOLATED THUNDERSTORMS IN THE
                    AFTERNOON.
MAX TEMPERATURE.....42-47.
MIN HUMIDITY........40-45 PERCENT.

20 FOOT WINDS.......WEST TO SOUTHWEST AT 5 TO 9 MPH...GUSTS TO 15 MPH
                    IN THE AFTERNOON.

RIDGE TOP WINDS.....WEST TO SOUTHWEST AT 10 TO 15 MPH...GUSTS TO 20 MPH
                    IN THE AFTERNOON.

LAL.................1 UNTIL 1200...THEN 2.
CHC OF WETTING RAIN.10 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......INCREASING TO 3500-4000 AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST AT 10 TO 15 MPH.
SMOKE DISPERSAL.....POOR...BECOMING FAIR AFTER 1300.

.FORECAST DAYS 3 THROUGH 5...

.THURSDAY NIGHT...PARTLY CLOUDY. SLIGHT CHANCE OF SNOW SHOWERS.
LOWS 20 TO 25. WINDS SOUTHWEST LESS THAN 10 MPH.

.FRIDAY...MOSTLY CLOUDY WITH CHANCE OF RAIN OR SNOW SHOWERS.
ISOLATED AFTERNOON THUNDERSTORMS. HIGHS 38 TO 43.
SOUTHWEST WINDS GENERALLY LESS THAN 10 MPH.

.SATURDAY...MOSTLY CLOUDY. CHANCE OF RAIN OR SNOW SHOWERS.
LOWS IN THE MID 20S. HIGHS 37 TO 42. WINDS GENERALLY LESS
THAN 10 MPH.

.SUNDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF RAIN AND SNOW
SHOWERS. LOWS IN THE MID 20S. HIGHS 40 TO 45. WINDS
GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...ROSS
REQUESTED BY...BART HOGAN
REASON FOR REQUEST...PRESCRIBED
.TAG 20120410.LAVAR.01/RIW