FNUS75 KRIW 211057
FWSRIW

SPOT FORECAST FOR NORTH BUFFALO...USFS BTF
NATIONAL WEATHER SERVICE RIVERTON WY
457 AM MDT FRI SEP 21 2012

FORECAST IS BASED ON REQUEST TIME OF 2017 MDT ON SEPTEMBER 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A RIDGE OF HIGH PRESSURE WILL HOLD OVER THE AREA THROUGH SATURDAY BEFORE
AN APPROACHING UPPER LOW BEGINS TO AFFECT THE WEATHER AS EARLY AS
LATE SUNDAY AFTERNOON OR EVENING. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS WILL RETURN TO THE FIRE BY THEN WITH THE POTENTIAL FOR
STRONG OUTFLOW WINDS IN EXCESS OF 40 MPH. LITTLE CHANGE IN THE WEATHER
THOUGH TODAY OR SATURDAY. AN INCREASING CHANCE OF SHOWERS AND ISOLATED
THUNDERSTORMS WILL OCCUR MONDAY INTO TUESDAY ALONG WITH COOLING
TEMPERATURES AND HIGHER RELATIVE HUMIDITIES.


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

FORECASTER...SKRBAC

.TODAY...
SKY/WEATHER.........SUNNY (5-15 PERCENT). A FEW THIN HIGH CLOUDS THIS
                    MORNING.
MAX TEMPERATURE.....71-73 AT 7500 FEET AND AROUND 60 AT 10K FEET.
MIN HUMIDITY........18-21 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....NORTHWEST 5 TO 10 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2900-3900 FT AGL INCREASING TO 5500-6000 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHWEST 5 TO 8 MPH.
SMOKE DISPERSAL.....POOR TO FAIR (17800-42400 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........CLEAR (0-5 PERCENT).
MIN TEMPERATURE.....NEAR 30 VALLEY FLOOR TO AROUND 40 ELSEWHERE.
MAX HUMIDITY........65-75 PERCENT VALLEY FLOOR TO 40-45 PERCENT
                    ELSEWHERE.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 4-7 MPH OR EAST.
RIDGE TOP WINDS.....NORTHWEST AROUND 5 MPH SHIFTING TO THE SOUTHEAST
                    LATE IN THE EVENING.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......4200-5200 FT AGL DECREASING TO 300-800 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....NORTHWEST 5 TO 9 MPH EARLY IN THE EVENING
                    THEN BECOMING SOUTHEAST AROUND MIDNIGHT.
SMOKE DISPERSAL.....POOR (4000-29000 KNOT-FT).

.SATURDAY...
SKY/WEATHER.........SUNNY (0-10 PERCENT).
MAX TEMPERATURE.....72-74 AT 7500 FEET AND 61-63 AT 10K FEET.
MIN HUMIDITY........15-19 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH. GUSTS UP TO 15 MPH.
RIDGE TOP WINDS.....SOUTHEAST 5 TO 10 MPH...BECOMING SOUTHWEST 6 TO 12 MPH
                    IN THE AFTERNOON WITH GUSTS AROUND 15 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3900-4900 FT AGL INCREASING TO 7000-7500 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH...BECOMING SOUTHWEST 7 TO 10 MPH
                    IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR BECOMING GOOD (20000-65000 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY NIGHT...MOSTLY CLEAR.
LOWS IN THE LOWER 40S. WINDS GENERALLY LESS THAN 10 MPH.
.SUNDAY...MOSTLY CLEAR. AREAS OF SMOKE IN THE MORNING. ISOLATED
SHOWERS AND THUNDERSTORMS WITH GUSTY WIND TO 40 MPH POSSIBLE.
LOWS IN THE LOWER 40S. HIGHS IN THE UPPER 60S. WINDS GENERALLY LESS THAN
10 MPH OUTSIDE OF ANY SHOWERS.
.MONDAY...COOLER. MOSTLY CLOUDY WITH CHANCE OF SHOWERS AND
ISOLATED THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS IN THE UPPER
50S. WINDS GENERALLY LESS THAN 10 MPH.
.TUESDAY...PARTLY CLOUDY WITH CHANCE OF SHOWERS WITH POSSIBLE
THUNDERSTORMS AND SNOW SHOWERS. LOWS IN THE UPPER 30S. HIGHS IN
THE MID 50S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...SKRBAC
REQUESTED BY...LOOKOUT
REASON FOR REQUEST...WILDFIRE
.TAG 20120920.NORTH.01/RIW