FNUS75 KRIW 102350
FWSRIW

SPOT FORECAST FOR ALPINE LAKE...BIA WRA
NATIONAL WEATHER SERVICE RIVERTON WY
550 PM MDT MON SEP 10 2012

FORECAST IS BASED ON REQUEST TIME OF 1657 MDT ON SEPTEMBER 10.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT THIS EVENING...

.DISCUSSION...

A DRY AIR MASS WILL CONTINUE TO GRADUALLY PUSH ACROSS THE
WILDFIRE THIS EVENING. ISOLATED SHOWERS AND THUNDERSTORMS WILL
REMAIN POSSIBLE THROUGH ABOUT 9 PM...WITH DRY CONDITIONS EXPECTED
FOR THE REMAINDER OF THE NIGHT AND TUESDAY. HUMIDITY WILL DECREASE
OVERNIGHT AS THE DRIER AIR MOVES ACROSS THE AREA. BREEZY WESTERLY
WINDS WILL REMAIN OVER THE WILDFIRE AREA TONIGHT. WINDS ARE
EXPECTED TO WEAKEN A BIT TUESDAY MORNING AND BECOME MORE NORTHWEST
ON TUESDAY. THE LOWER ELEVATIONS OF THE FIRE SHOULD SEE WINDS
BECOME EAST TO A NORTHEAST AROUND MIDDAY TUESDAY...AS A WEAK COLD
FRONT PUSHES INTO THE AREA.

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

FORECASTER...MURRELL

.TONIGHT...
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT) WITH ISOLATED RAIN
                    SHOWERS AND THUNDERSTORMS IN THE EVENING. MOSTLY
                    CLEAR (15 PERCENT) AFTER MIDNIGHT.
MIN TEMPERATURE.....45.
MAX HUMIDITY........60 PERCENT THIS EVENING...DECREASING THROUGH THE
                    NIGHT TO AROUND 30 PERCENT.
20 FOOT WINDS.......WEST SOUTHWEST WINDS AROUND 15-25 MPH WITH GUSTS
                    UP TO 35 MPH IN THE EVENING...BECOMING SOUTHWEST
                    AROUND 15 MPH BY AROUND 10 PM. HIGHER WINDS ARE EXPECTED
                    AT THE NORTH ZONE RAWS SITE.
RIDGE TOP WINDS.....WEST AROUND 30 MPH.
LAL.................2 UNTIL 9 PM...THEN 1.
CHC OF WETTING RAIN.3 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......4300 FT AGL DECREASING TO 1200 FT AGL BY 9 PM.
TRANSPORT WINDS.....WEST AROUND 30 MPH.
SMOKE DISPERSAL.....VERY GOOD DECREASING TO FAIR BY 9 PM.

.TUESDAY...
SKY/WEATHER.........VARIABLE HIGH CLOUDINESS.
MAX TEMPERATURE.....55-60.
MIN HUMIDITY........15-20 PERCENT.
20 FOOT WINDS.......WEST 10-15 MPH...BECOMING NORTHWEST AROUND
                    10-15 MPH BETWEEN NOON AND 2 PM. GUSTS TO 25
                    MPH. HIGHER WINDS ARE EXPECTED AT THE NORTH
                    ZONE RAWS SITE. WINDS BECOMING EAST TO NORTHEAST
                    AROUND 10 MPH BETWEEN NOON AND 2 PM BELOW AROUND
                    9000 FEET.
RIDGE TOP WINDS.....WEST 25-30 MPH...BECOMING NORTHWEST 15-20 MPH
                    BY AROUND NOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......1300 FT AGL INCREASING TO 5500 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 15-25 MPH.
SMOKE DISPERSAL.....FAIR INCREASING TO VERY GOOD IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...

.TUESDAY NIGHT...MOSTLY CLEAR. AREAS OF SMOKE. LOWS IN THE UPPER
30S. WINDS GENERALLY LESS THAN 10 MPH.

.WEDNESDAY...MOSTLY CLEAR. LOWS IN THE LOWER 30S. HIGHS AROUND 60.
WEST TO NORTHWEST WINDS 10-15 MPH.

.THURSDAY...CLEAR. AREAS OF SMOKE. LOWS IN THE UPPER 30S. HIGHS
IN THE MID 50S. WINDS GENERALLY LESS THAN 10 MPH.

.FRIDAY...WARMER...CLEAR. LOWS IN THE MID 40S. HIGHS IN THE UPPER
60S. WINDS GENERALLY LESS THAN 10 MPH.

.SATURDAY...MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE UPPER
60S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...MURRELL
REQUESTED BY...SID HALL
REASON FOR REQUEST...WILDFIRE
.TAG 20120910.ALPIN.01/RIW