FNUS75 KRIW 212348
FWSRIW

SPOT FORECAST FOR ALPINE LAKE...BIA WRA
NATIONAL WEATHER SERVICE RIVERTON WY
548 PM MDT TUE AUG 21 2012

FORECAST IS BASED ON REQUEST TIME OF 1707 MDT ON AUGUST 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

A STORM SYSTEM WILL SWING ACROSS THE REGION TONIGHT AND EARLY
WEDNESDAY. THIS WILL RESULT IN INCREASED WESTERLY WINDS...AND A
SLIGHT CHANCE FOR SHOWERS AND THUNDERSTORMS LATER TONIGHT AND ON
WEDNESDAY. WESTERLY WINDS COULD WEAKEN A BIT THIS EVENING...BEFORE
PICKING UP BY AROUND MIDNIGHT AS THE STORM SYSTEM APPROACHES FROM
THE WEST. ALSO...OVERNIGHT HUMIDITY RECOVERY WILL BE ON THE POOR
SIDE UNLESS THE WILDFIRE IS FORTUNATE TO RECEIVE SOME RAIN TONIGHT.
DRY AND WARM WEATHER IS EXPECTED THURSDAY. ELEVATED TO EXTREME
FIRE WEATHER CONDITIONS ARE POSSIBLE FRIDAY...AS A STRONGER STORM
SYSTEM MOVES ACROSS THE EXTREME NORTHERN ROCKIES.

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

FORECASTER...MURRELL

.TONIGHT...
SKY/WEATHER.........INCREASING CLOUDINESS THIS EVENING. MOSTLY CLOUDY
                    BY 9 PM (75-85 PERCENT). ISOLATED RAIN SHOWERS AND
                    THUNDERSTORMS MAINLY AFTER 9 PM.
MIN TEMPERATURE.....45-50.
MAX HUMIDITY........45 PERCENT.
20 FOOT WINDS.......WEST 5-10 MPH WITH GUSTS TO AROUND 20 MPH IN THE
                    EVENING...BECOMING WEST 10 TO 15 MPH WITH GUSTS TO
                    25 MPH AFTER MIDNIGHT. GUSTY AND ERRATIC WINDS
                    EXPECTED NEAR ANY THUNDERSTORMS.
RIDGE TOP WINDS.....WEST SOUTHWEST 10 TO 15 MPH SHIFTING TO THE WEST
                    AROUND 20 MPH AROUND MIDNIGHT.
LAL.................2.
CHC OF WETTING RAIN.5 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......7800 FT AGL DECREASING TO 2500 FT AGL BY 9 PM.
TRANSPORT WINDS.....WEST 15 TO 25 MPH.
SMOKE DISPERSAL.....GOOD TO FAIR.

.WEDNESDAY...
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT) IN THE MORNING
                    BECOMING PARTLY CLOUDY (40 PERCENT) BY
                    AFTERNOON. ISOLATED SHOWERS AND THUNDERSTORMS
                    MAINLY IN THE MORNING.
MAX TEMPERATURE.....64-68.
MIN HUMIDITY........15-20 PERCENT.
20 FOOT WINDS.......WEST TO NORTHWEST WINDS 10 TO 15 MPH WITH
                    GUSTS TO AROUND 30 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS.
RIDGE TOP WINDS.....WEST NORTHWEST 15-20 MPH.
LAL.................2.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3000 FT AGL INCREASING TO 7700 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....WEST NORTHWEST 20 TO 25 MPH.
SMOKE DISPERSAL.....GOOD INCREASING TO EXCELLENT BY AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...

.WEDNESDAY NIGHT...PARTLY CLOUDY. LOWS IN THE UPPER 40S. WEST
WINDS AROUND 10 MPH.

.THURSDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
ISOLATED THUNDERSTORMS. LOWS IN THE UPPER 40S. HIGHS IN THE LOWER
70S. WEST WINDS AROUND 10 MPH.

.FRIDAY...MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS AROUND 70.
WEST WINDS 15-25 MPH. GUSTS TO 35 MPH.

.SATURDAY...CLEAR. LOWS IN THE LOWER 40S. HIGHS AROUND 70. WINDS
GENERALLY LESS THAN 10 MPH.

.SUNDAY...MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE LOWER
70S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...MURRELL
REQUESTED BY...JUAN EDER
REASON FOR REQUEST...WILDFIRE
.TAG 20120821.ALPIN.01/RIW