FNUS75 KRIW 141709
FWSRIW

SPOT FORECAST FOR ALPINE LAKE...BIA WRA
NATIONAL WEATHER SERVICE RIVERTON WY
1109 AM MDT FRI SEP 14 2012

FORECAST IS BASED ON REQUEST TIME OF 2022 MDT ON SEPTEMBER 13.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY MORNING THROUGH
SATURDAY EVENING...

.DISCUSSION...DRY WEATHER IS IN THE
FORECAST FOR TODAY AND SATURDAY WITH LOW RELATIVE HUMIDITY. BASED
ON THE HIGH HAINES INDEX...A DECENT MIXING HEIGHT...AND THE EXPECTED
WIND TODAY IN THE MIXED LAYER...THE SMOKE SHOULD EASILY DISPERSE
ONCE THE BURN GETS GOING. SATURDAY LOOKS SIMILAR BUT THE WIND WILL
BE 8 TO 12 MPH STRONGER FROM 10000 FEET THROUGH 18000 FEET MSL.
WIND DIRECTION WILL BE SIMILAR BOTH DAYS. THE WIND IS LIKELY TO
REMAIN UP SATURDAY NIGHT DUE TO AN APPROACHING WEATHER SYSTEM.
ON SUNDAY A WEAK WEATHER SYSTEM AND COLD FRONT MOVES THROUGH THE
FIRE AREA SUNDAY AFTERNOON BETWEEN 1900 AND 2100. ISOLATED SHOWERS
OR STORMS ARE POSSIBLE WITH GUSTY WIND AND ONLY LIGHT RAINFALL
EXPECTED...ONE TENTH OF AN INCH OR LESS.



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

FORECASTER...HATTINGS

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY (5-15 PERCENT). AREAS OF SMOKE.
MAX TEMPERATURE.....62-66.
MIN HUMIDITY........10-15 PERCENT.
20 FOOT WINDS.......WEST TO SOUTHWEST WINDS 5 TO 10 MPH BEFORE 1200
                    9 TO 14 MPH AFTER 1200 WITH GUSTS TO 18 MPH.
RIDGE TOP WINDS.....WEST TO SOUTHWEST 15 TO 25 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......2400-3400 FT AGL INCREASING TO 6300-7300 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 15 TO 25 MPH.
SMOKE DISPERSAL.....FAIR (44100 KNOT-FT) INCREASING TO VERY GOOD
                    (100700 KNOT-FT) IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........CLEAR (5-15 PERCENT). AREAS OF SMOKE.
MIN TEMPERATURE.....42-46.
MAX HUMIDITY........25-30 PERCENT.
20 FOOT WINDS.......WEST WINDS 12 TO 18 MPH. GUSTS UP TO 25 MPH.
RIDGE TOP WINDS.....WEST 15 TO 20 MPH INCREASING TO 20 TO 30 MPH
                    AFTER MIDNIGHT.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......5500-6500 FT AGL DECREASING TO 3300 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....WEST 20 TO 30 MPH.
SMOKE DISPERSAL.....GOOD TO VERY GOOD (77600-102100 KNOT-FT).

.SATURDAY...
SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT).
MAX TEMPERATURE.....62-66.
MIN HUMIDITY........10 TO 15 PERCENT.
20 FOOT WINDS.......WEST WINDS 10 TO 20 MPH WITH GUSTS TO AROUND 25
                    MPH.
RIDGE TOP WINDS.....WEST 20 TO 30 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......5100-6100 FT AGL INCREASING TO 8800-9800 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 20 TO 30 MPH.
SMOKE DISPERSAL.....VERY GOOD (139700 KNOT-FT) INCREASING TO
                    EXCELLENT (221500 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY NIGHT...MOSTLY CLEAR. LOWS IN THE MID 40S. WEST WINDS
AROUND 17 MPH.
.SUNDAY...PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT CHANCE
OF SNOW SHOWERS. LOWS IN THE MID 30S. HIGHS IN THE UPPER 50S.
NORTHWEST WINDS AROUND 11 MPH.
.MONDAY...MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE LOWER
50S. WINDS GENERALLY LESS THAN 10 MPH.
.TUESDAY...CLEAR. LOWS IN THE LOWER 40S. HIGHS AROUND 60. WINDS
GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...HATTINGS
REQUESTED BY...MIKE  HOSS  HOSTETLER
REASON FOR REQUEST...WILDFIRE
.TAG 20120913.ALPIN.02/RIW