FNUS75 KRIW 021710
FWSRIW

SPOT FORECAST FOR LAVA RX...USFS BTF
NATIONAL WEATHER SERVICE RIVERTON WY
1110 AM MDT MON APR 2 2012

FORECAST IS BASED ON IGNITION TIME OF 1300 MDT ON APRIL 03.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

LIGHT WIND AND LOW DISPERSAL RATES CAN BE EXPECTED THROUGH TUESDAY
AS HIGH PRESSURE SETTLES IN OVER THE BURN AREA. NO PRECIPITATION
IS EXPECTED THROUGH TUESDAY. A WARMING TREND WILL INCREASE MIXING
HEIGHTS FOR WEDNESDAY AND WIND MAY INCREASE A BIT AHEAD OF AN
APPROACHING STORM SYSTEM BY WEDNESDAY NIGHT. ISOLATED SHOWER
ACTIVITY IS POSSIBLE THURSDAY WITH MAYBE EVEN AN ISOLATED
THUNDERSTORM DURING THE AFTERNOON HOURS.


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

FORECASTER...BERC

.TONIGHT...
SKY/WEATHER.........CLEAR (5-15 PERCENT).
MIN TEMPERATURE.....15-19.
MAX HUMIDITY........79-87 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 4-7 MPH.
RIDGE TOP WINDS.....NORTHWEST AROUND 10 MPH SHIFTING TO THE EAST
                    AFTER 10 PM.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2300-3300 FT AGL.
TRANSPORT WINDS.....NORTHWEST AROUND 12 MPH SHIFTING TO THE EAST 9
                    TO 13 MPH AFTER 10 PM.
SMOKE DISPERSAL.....POOR (17100-31700 KNOT-FT).

.TUESDAY...
SKY/WEATHER.........MOSTLY SUNNY (5-15 PERCENT).
MAX TEMPERATURE.....46-50.
MIN HUMIDITY........26-31 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....EAST 5 TO 10 MPH SHIFTING TO THE WEST IN THE
                    AFTERNOON.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2400-3400 FT AGL.
TRANSPORT WINDS.....EAST 9 TO 12 MPH SHIFTING TO THE WEST 10 TO 12
                    MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (12400-23700 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.TUESDAY NIGHT...NOT AS COLD. PARTLY CLOUDY. LOWS IN THE UPPER
20S. WINDS GENERALLY LESS THAN 10 MPH.
.WEDNESDAY...PARTLY CLOUDY. LOWS IN THE UPPER 20S. HIGHS IN THE
MID 50S. WINDS 10 TO 15 MPH.
.THURSDAY...COOLER. MOSTLY CLOUDY WITH CHANCE OF SHOWERS...SNOW
SHOWERS AND ISOLATED THUNDERSTORMS. LOWS IN THE LOWER 20S. HIGHS
IN THE MID 40S. WINDS GENERALLY LESS THAN 10 MPH.
.FRIDAY...COLDER. CLOUDY WITH CHANCE OF SNOW SHOWERS. LOWS AROUND
19. HIGHS IN THE MID 30S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...BERC
REQUESTED BY...JASON LAWHON
REASON FOR REQUEST...PRESCRIBED
.TAG 20120403.LAVAR.01/RIW