FNUS75 KRIW 191003
FWSRIW

SPOT FORECAST FOR ALPINE LAKE...BIA WRA
NATIONAL WEATHER SERVICE RIVERTON WY
403 AM MDT WED SEP 19 2012

FORECAST IS BASED ON REQUEST TIME OF 2106 MDT ON SEPTEMBER 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
IT WILL CONTINUE DRY THE REMAINDER OF THE WEEK WITH A GENERAL NORTHWEST
FLOW CONTINUING ALOFT. FOR TODAY...A VERY WEEK COLD FRONT WILL MOVE NEAR
THE LOWER ELEVATIONS OF THE FIRE THIS MORNING. THE MAIN EFFECT FROM THIS
WEAK FRONT WILL BE TO ALLOW SOME LIGHT EAST WIND TO WORK INTO THE LOWER
ELEVATIONS OF THE FIRE THIS MORNING AND ALLOW FOR DECREASING RIDGETOP
WINDS TODAY. THE GUSTY NORTH TO NORTHWEST RIDGETOP WINDS WILL LIKELY RETURN
LATER THIS EVENING.


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

FORECASTER...SKRBAC

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY WITH GENERALLY THIN HIGH CIRRUS CLOUDS
                    (30-40 PERCENT).
MAX TEMPERATURE.....57-60 BETWEEN 10K AND 11K FEET...NEAR 70 ON THE LOWER
                    PORTION OF THE FIRE.
MIN HUMIDITY........20-23 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....NORTH TO NORTHWEST 15 TO 20 MPH EARLY IN THE MORNING
                    WITH SOME GUSTS AROUND 25 MPH...THEN BECOMING LIGHT
                    AND VARIABLE OR SOUTHEAST AROUND 5 TO 10 MPH IN THE
                    BY AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......1500-2500 FT AGL INCREASING TO 3500-4500 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHWEST 10 TO 15 MPH DECREASING TO AROUND 5
                    MPH IN THE LATE MORNING AND EARLY
                    AFTERNOON AND BECOMING SOUTHEAST BY NOON.
SMOKE DISPERSAL.....POOR (20000-25000 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT).
MIN TEMPERATURE.....41-46.
MAX HUMIDITY........38-45 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 4-7 MPH BECOMING NORTHWEST
                    AROUND 8 MPH EARLY IN THE MORNING. GUSTS UP TO
                    15 MPH.
RIDGE TOP WINDS.....LIGHT AND VARIABLE WINDS BECOMING NORTHWEST 15
                    TO 20 MPH WITH GUSTS TO 30 MPH AFTER MIDNIGHT.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......1500-2500 FT AGL...DECREASING TO 500-1000 FT AGL
                    IN THE LOWER ELEVATIONS IN THE LATE EVENING.
TRANSPORT WINDS.....LIGHT AND VARIABLE WINDS BECOMING NORTHWEST 13
                    TO 15 MPH IN THE LATE EVENING AND OVERNIGHT.
SMOKE DISPERSAL.....POOR (3800-28000 KNOT-FT).

.THURSDAY...
SKY/WEATHER.........SUNNY (0-10 PERCENT).
MAX TEMPERATURE.....57-60 BETWEEN 10K AND 11K FEET...NEAR 70 ON THE LOWER
                    PORTION OF THE FIRE.
MIN HUMIDITY........17-20 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....NORTHWEST AROUND 15 MPH BECOMING EAST
                    AROUND 5 MPH IN THE AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3700-4700 FT AGL INCREASING TO 6500-7500 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHWEST 10 TO 18 MPH SHIFTING TO THE EAST
                    5 TO 8 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....FAIR (50900-56000 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.THURSDAY NIGHT...CLEAR. LOWS IN THE LOWER 40S.
WINDS GENERALLY LESS THAN 10 MPH...EXCEPT GUSTY NORTH WINDS OVER
THE RIDGES OF 15 TO 25 MPH.
.FRIDAY...CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE LOWER 60S.
WINDS GENERALLY LESS THAN 10 MPH.
.SATURDAY...CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE LOWER 60S.
WINDS GENERALLY LESS THAN 10 MPH.
.SUNDAY...MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE MID
60S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...SKRBAC
REQUESTED BY...BEAU KIDD
REASON FOR REQUEST...WILDFIRE
.TAG 20120918.ALPIN.01/RIW