FNUS75 KRIW 091744
FWSRIW

SPOT FORECAST FOR ALPINE LAKE...USFS
NATIONAL WEATHER SERVICE RIVERTON WY
1144 AM MDT SUN SEP 9 2012

FORECAST IS BASED ON REQUEST TIME OF 1120 MDT ON SEPTEMBER 09.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

A STRENGTHENING PRESSURE GRADIENT WILL BRING INCREASED WIND THIS
AFTERNOON IN THE FIRE AREA. AN ELONGATED DISTURBANCE WILL BRING A
COLD FRONT INTO WESTERN WYOMING THIS EVENING. A FEW SHOWERS AND
PERHAPS AN ISOLATED THUNDERSTORM ARE POSSIBLE DURING THE LATE
EVENING AND OVERNIGHT HOURS WITH THE FRONT. AFTER A LULL DURING
THE MORNING HOURS MONDAY...ISOLATED TO SCATTERED SHOWERS AND DRY
THUNDERSTORMS ARE POSSIBLE MONDAY AFTERNOON AND EVENING.


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

FORECASTER...BERC

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT). ISOLATED LIGHT
                    SHOWERS POSSIBLE IN THE AFTERNOON.
MAX TEMPERATURE.....68-75.
MIN HUMIDITY........10-14 PERCENT.
20 FOOT WINDS.......WEST WINDS 11 TO 14 MPH SHIFTING TO THE SOUTH
                    SOUTHWEST 10 TO 12 MPH AFTER 1400...THEN
                    SHIFTING TO THE SOUTHWEST BY 1700. GUSTS UP TO
                    25 MPH.
RIDGE TOP WINDS.....SOUTHWEST AROUND 20 MPH.
LAL.................1.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......4700-5700 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 16 TO 24 MPH.
SMOKE DISPERSAL.....GOOD (64500-96200 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT). ISOLATED LIGHT
                    SHOWERS THUNDERSTORMS POSSIBLE.
MIN TEMPERATURE.....45-50.
MAX HUMIDITY........60-70 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS 11 TO 24 MPH WITH GUSTS TO
                    AROUND 35 MPH. GUSTY AND ERRATIC WINDS EXPECTED
                    NEAR THUNDERSTORMS.
RIDGE TOP WINDS.....SOUTHWEST AROUND 20 MPH INCREASING TO 25 TO 30
                    MPH IN THE LATE EVENING AND OVERNIGHT.
LAL.................2.
CHC OF WETTING RAIN.10 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4300-5300 FT AGL.
TRANSPORT WINDS.....WEST 25 TO 31 MPH.
SMOKE DISPERSAL.....GOOD TO VERY GOOD (95800-133000 KNOT-FT).

.MONDAY...
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (35-45 PERCENT). ISOLATED SHOWERS
                    AND DRY THUNDERSTORMS WITH THE GREATEST COVERAGE
                    IN THE AFTERNOON.
MAX TEMPERATURE.....65-72.
MIN HUMIDITY........12-19 PERCENT.
20 FOOT WINDS.......WEST WINDS 10 TO 18 MPH. GUSTS UP TO 30 MPH
                    INCREASING TO 35 MPH LATE IN THE AFTERNOON.
                    GUSTY AND ERRATIC WIND EXPECTED NEAR THUNDERSTORMS.
RIDGE TOP WINDS.....SOUTHWEST 20 TO 25 MPH SHIFTING TO THE WEST AROUND
                    30 MPH IN THE AFTERNOON.
LAL.................2. CHC OF WETTING RAIN.7 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE
                    GROWTH.
MIXING HEIGHT.......6900-7900 FT AGL.
TRANSPORT WINDS.....WEST 29 TO 35 MPH.
SMOKE DISPERSAL.....EXCELLENT (179500 KNOT-FT) INCREASING TO EXCELLENT
                    (230600 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.MONDAY NIGHT...COLDER. PARTLY CLOUDY. ISOLATED SHOWERS AND DRY
THUNDERSTORMS IN THE EVENING...THEN INTERMITTENT SPRINKLES AFTER
MIDNIGHT. LOWS IN THE MID 30S. WEST WINDS AROUND 11 MPH.
.TUESDAY...COOLER. MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN
THE UPPER 50S. WINDS GENERALLY LESS THAN 10 MPH.
.WEDNESDAY...CLEAR. LOWS IN THE UPPER 20S. HIGHS AROUND 50. WINDS
GENERALLY LESS THAN 10 MPH.
.THURSDAY...CLEAR. LOWS AROUND 40. HIGHS IN THE MID 50S. WINDS
GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...BERC
REQUESTED BY...SID HALL
REASON FOR REQUEST...WILDFIRE
.TAG 20120909.ALPIN.01/RIW