FNUS75 KRIW 201026
FWSRIW

SPOT FORECAST FOR ALPINE LAKE...BIA WRA
NATIONAL WEATHER SERVICE RIVERTON WY
426 AM MDT THU SEP 20 2012

FORECAST IS BASED ON REQUEST TIME OF 2018 MDT ON SEPTEMBER 19.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
VERY SIMILAR DAY TO YESTERDAY WITH GUSTY RIDGETOP WINDS THIS MORNING THEN
DECREASING AND BECOMING VARIABLE OR GENERALLY LIGHT EAST TO SOUTHEAST.
NORTHWEST RIDGE TOP WINDS WILL DEVELOP AGAIN OVERNIGHT BUT NOT AS STRONG
AS THIS MORNING. NOT A LOT OF CHANGE TOMORROW WITH A DRY RIDGE OF HIGH
PRESSURE HOLDING TO THE WEST.


...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 HIGH THIN CIRRUS CLOUDS
                    (20-30 PERCENT).
MAX TEMPERATURE.....57-60 BETWEEN 10K AND 11K FEET TO LOWER 70S ON THE
                    LOWER ELEVATIONS OF THE FIRE.
MIN HUMIDITY........17-20 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....NORTH 10 TO 20 MPH AND GUSTY EARLY...THEN DECREASING TO
                    5 TO 10 MPH BY LATE MORNING...THEN VARIABLE OR SOUTHEAST
                    5 TO 10 MPH IN THE AFTERNOON.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2000-2500 FT AGL INCREASING TO 4000-4500 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHWEST 10 TO 17 MPH MOST OF THE MORNING THEN
                    VARIABLE TO SOUTHEAST AROUND 5 MPH.
SMOKE DISPERSAL.....POOR (9000 TO 30000 KNOT-FT)

.TONIGHT...
SKY/WEATHER.........CLEAR (0-10 PERCENT).
MIN TEMPERATURE.....41-46.
MAX HUMIDITY........40-45 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 4-7 MPH.
RIDGE TOP WINDS.....VARIABLE 5 TO 10 MPH...BECOMING NORTH 10 TO 15 MPH
                    AFTER MIDNIGHT WITH GUSTS TO 20 MPH.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2000-2500 FT AGL DECREASING TO 400-1000 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....VARIABLE 4 TO 7 MPH BECOMING NORTH AFTER MIDNIGHT.
SMOKE DISPERSAL.....POOR (4500-12000 KNOT-FT).

.FRIDAY...
SKY/WEATHER.........SUNNY (0-5 PERCENT).
MAX TEMPERATURE.....56-59 BETWEEN 10K AND 11K FEET TO AROUND 70 ON THE
                    LOWER ELEVATIONS OF THE FIRE.
MIN HUMIDITY........19-22 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....NORTHWEST 8 TO 12 MPH IN THE MORNING BECOMING
                    SOUTHEAST IN THE AFTERNOON.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......1500-2000 FT AGL INCREASING TO 3500-4000 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....LIGHT AND VARIABLE WINDS BECOMING SOUTHEAST
                    AROUND 8 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (10000-28000 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.FRIDAY NIGHT...CLEAR. LOWS IN THE LOWER 40S. 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.
.MONDAY...MOSTLY CLOUDY. CHANCE OF SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS AROUND 60. WINDS
GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...SKRBAC
REQUESTED BY...BEAU KIDD
REASON FOR REQUEST...WILDFIRE
.TAG 20120919.ALPIN.01/RIW