FNUS75 KRIW 122006
FWSRIW

SPOT FORECAST FOR ALPINE LAKE...BIA WRA
NATIONAL WEATHER SERVICE RIVERTON WY
206 PM MDT WED SEP 12 2012

FORECAST IS BASED ON REQUEST TIME OF 1339 MDT ON SEPTEMBER 12.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...A WEAK COLD FRONT DROPPING INTO THE AREA WILL BRING A
CHILLY NIGHT TONIGHT. WINDS MAY BE BECOME BREEZY EARLY THIS EVENING
WITH THE PASSAGE OF THE FRONT THEN LIGHT AND VARIABLE LATER TONIGHT.
AN AREA OF HIGH PRESSURE WILL BUILD OVER THE REGION TOMORROW.
TEMPERATURES WILL AVERAGE AROUND 5 DEGREES WARMER WITH RELATIVE
HUMIDITY A BUT LOWER. WINDS WILL BE MAINLY LIGHT AND DIURNAL. WITH
POOR MIXING SMOKE DISPERSAL IS EXPECTED TO BE POOR MOST
OF THURSDAY. FRIDAY WILL BE WARMER WITH LOW RELATIVE HUMIDITY FALLING
UNDER 15 PERCENT.

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

FORECASTER...HATTINGS

.REST OF TODAY...
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT). AREAS OF SMOKE.
MAX TEMPERATURE.....50-60.
MIN HUMIDITY........15-20 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-10 MPH.
RIDGE TOP WINDS.....NORTHEAST AROUND 10 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4800-5800 FT AGL.
TRANSPORT WINDS.....WEST 8 TO 12 MPH SHIFTING TO THE NORTHEAST
                    AT 8 TO 16 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....FAIR (57500 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........CLEAR (5-15 PERCENT). AREAS OF SMOKE.
MIN TEMPERATURE.....30-35.
MAX HUMIDITY........40-50 PERCENT.
20 FOOT WINDS.......EAST WINDS 5 TO 10 MPH WITH GUSTS TO AROUND 15
                    MPH EARLY IN THE EVENING BECOMING
                    DOWNSLOPE/DOWNVALLEY 4-8 MPH.
RIDGE TOP WINDS.....EAST 10 TO 15 MPH SHIFTING TO THE SOUTHWEST 5
                    TO 10 MPH AFTER MIDNIGHT.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......3600-4600 FT AGL DECREASING TO 1700-2200 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....EAST 12 TO 15 MPH SHIFTING TO THE SOUTHWEST 9
                    TO 10 MPH AFTER MIDNIGHT.
SMOKE DISPERSAL.....POOR TO FAIR (13600-42800 KNOT-FT).

.THURSDAY...
SKY/WEATHER.........SUNNY (0-10 PERCENT). AREAS OF SMOKE.
MAX TEMPERATURE.....54-64.
MIN HUMIDITY........13-18 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 4-8 MPH.
RIDGE TOP WINDS.....WEST 5 TO 10 MPH SHIFTING TO THE NORTH LATE
                    IN THE MORNING...THEN SHIFTING TO THE EAST IN
                    THE AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......2800-3800 FT AGL.
TRANSPORT WINDS.....WEST 6 TO 12 MPH SHIFTING TO THE NORTH AROUND
                    LATE IN THE MORNING...THEN SHIFTING TO
                    THE EAST 10 TO 15 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (14500-31600 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.THURSDAY NIGHT...NOT AS COOL. CLEAR. LOWS IN THE LOWER 40S.
WINDS GENERALLY LESS THAN 10 MPH.
.FRIDAY...CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE UPPER 60S.
WINDS GENERALLY LESS THAN 10 MPH.
.SATURDAY...MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE MID
60S. WEST WINDS AROUND 11 MPH.
.SUNDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS...
THUNDERSTORMS AND SNOW SHOWERS. LOWS IN THE MID 30S. HIGHS IN THE
UPPER 50S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...HATTINGS
REQUESTED BY...SID HALL
REASON FOR REQUEST...WILDFIRE
.TAG 20120912.ALPIN.01/RIW