FNUS75 KRIW 311453
FWSRIW

SPOT FORECAST FOR ALPINE LAKE...BIA WRA
NATIONAL WEATHER SERVICE RIVERTON WY
853 AM MDT FRI AUG 31 2012

FORECAST IS BASED ON REQUEST TIME OF 0815 MDT ON AUGUST 31.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

A PLUME OF MONSOON MOISTURE WILL REMAIN OVER THE AREA THROUGH
SATURDAY. SHOWERS AND THUNDERSTORMS WILL DEVELOP THIS AFTERNOON
AND COULD BE DRY AT FIRST BUT WILL TRANSITION TO WETTER STORMS
LATER IN THE AFTERNOON. BREEZY CONDITIONS WILL DEVELOP AS WELL
WITH GUSTY SOUTHWEST WIND. GUSTY AND ERRATIC WIND TO 40 MPH CAN BE
EXPECTED WITH ANY THUNDERSTORMS IN THE AREA. A PASSING UPPER LEVEL
DISTURBANCE MAY KEEP SHOWER ACTIVITY GOING THROUGH TONIGHT WITH A
GREATER COVERAGE OF THUNDERSTORMS EXPECTED FOR SATURDAY. BY SUNDAY
WE LOSE SOME OF THE MOISTURE AS UPPER LEVEL WINDS BECOME WESTERLY.
ISOLATED SHOWER AND THUNDERSTORM ACTIVITY IS STILL POSSIBLE BUT
COVERAGE AND THE CHANCE FOR WETTING RAIN WILL BE LESS THAN FRIDAY
OR SATURDAY.

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

FORECASTER...BERC

.TODAY...
SKY/WEATHER.........MOSTLY CLOUDY (55-65 PERCENT) BECOMING CLOUDY
                    (75-85 PERCENT) AFTER NOON. SCATTERED RAIN
                    SHOWERS IN THE MORNING. NUMEROUS RAIN SHOWERS
                    AND ISOLATED THUNDERSTORMS AFTER 1300.
MAX TEMPERATURE.....67-71.
MIN HUMIDITY........29-32 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS 10 TO 12 MPH WITH GUSTS TO 20 MPH.
                    GUSTY AND ERRATIC WINDS EXPECTED NEAR
                    THUNDERSTORMS IN THE AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST AROUND 25 MPH.
LAL.................1 UNTIL 1300...THEN 3.
CHC OF WETTING RAIN.17 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3700-4700 FT AGL INCREASING TO 6000-7000 FT AGL
                    AFTER 1300.
TRANSPORT WINDS.....SOUTHWEST 17 TO 22 MPH.
SMOKE DISPERSAL.....GOOD TO VERY GOOD (75700-124300 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT). ISOLATED
                    THUNDERSTORMS POSSIBLE THROUGH 2300.
                    SCATTERED RAIN SHOWERS THROUGH THE NIGHT.
MIN TEMPERATURE.....AROUND 50.
MAX HUMIDITY........72-75 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS 10 TO 13 MPH WITH GUSTS TO 20 MPH.
                    GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS.
RIDGE TOP WINDS.....SOUTHWEST AROUND 20 MPH.
LAL.................2 UNTIL 2300...THEN 1.
CHC OF WETTING RAIN.8 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......5900-6900 FT AGL DECREASING TO 3200-4200 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTHWEST 20 TO 26 MPH.
SMOKE DISPERSAL.....VERY GOOD (128300 KNOT-FT) DECREASING TO GOOD
                    (71400 KNOT-FT) AFTER MIDNIGHT.

.SATURDAY...
SKY/WEATHER.........CLOUDY (75-85 PERCENT). SCATTERED RAIN SHOWERS
                    AND ISOLATED THUNDERSTORMS THROUGH THE DAY.
MAX TEMPERATURE.....65-69.
MIN HUMIDITY........31-35 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS 15 TO 19 MPH. GUSTS UP TO 30
                    MPH INCREASING TO 35 MPH AFTER 1500.
                    GUSTY AND ERRATIC WINDS EXPECTED NEAR
                    THUNDERSTORMS.
RIDGE TOP WINDS.....SOUTHWEST 25 TO 30 MPH.
LAL.................3.
CHC OF WETTING RAIN.20 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3000-4000 FT AGL INCREASING TO 5100-6100 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 23 TO 31 MPH.
SMOKE DISPERSAL.....GOOD (78700 KNOT-FT) INCREASING TO VERY GOOD
                    (144500 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY NIGHT...MOSTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS IN THE EVENING...THEN ISOLATED SHOWERS AND
THUNDERSTORMS AFTER MIDNIGHT. LOWS IN THE MID 40S. SOUTHWEST
WINDS AROUND 13 MPH.
.SUNDAY...PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS. LOWS
IN THE LOWER 40S. HIGHS IN THE UPPER 60S. WINDS GENERALLY LESS
THAN 10 MPH.
.LABOR DAY...MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE
LOWER 70S. WINDS GENERALLY LESS THAN 10 MPH.
.TUESDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
ISOLATED THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE LOWER
70S. WEST WINDS AROUND 11 MPH.

$$

FORECASTER...BERC
REQUESTED BY...CAL ANACKER
REASON FOR REQUEST...WILDFIRE
.TAG 20120831.ALPIN.01/RIW