FNUS75 KRIW 201051
FWSRIW

SPOT FORECAST FOR NORTH BUFFALO...USFS BTF
NATIONAL WEATHER SERVICE RIVERTON WY
451 AM MDT THU SEP 20 2012

FORECAST IS BASED ON REQUEST TIME OF 2027 MDT ON SEPTEMBER 19.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
DRY RIDGE OF HIGH PRESSURE WILL HOLD OVERHEAD THE REMAINDER OF THE WEEK.
NORTH TO NORTHWEST RIDGETOP WINDS WILL CONTINUE WHILE LOWER ELEVATION
WINDS ARE MORE DIURNALLY DRIVEN. NO SIGNIFICANT CHANGES TO THE RELATIVE
HUMIDITIES TODAY OR TOMORROW COMPARED TO WEDNESDAY.


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

FORECASTER...SKRBAC

.TODAY...
SKY/WEATHER.........SUNNY (0-10 PERCENT). JUST SOME THIN HIGH CLOUDS.
MAX TEMPERATURE.....AROUND 70 AT 7500 FEET AND AROUND 60 AT 10K FEET.
MIN HUMIDITY........19-22 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING NORTHWEST
                    IN THE AFTERNOON.
RIDGE TOP WINDS.....NORTHWEST 10 TO 15 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......3000-3500 FT AGL INCREASING TO 5500-6000 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHWEST 8 TO 12 MPH.
SMOKE DISPERSAL.....POOR (32000 KNOT-FT) INCREASING TO GOOD (60000
                    KNOT-FT) IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........CLEAR (0-10 PERCENT).
MIN TEMPERATURE.....AROUND 30 ON THE VALLEY FLOOR AND 40 TO 45
                    ELSEWHERE.
MAX HUMIDITY........70-80 PERCENT LOWER ELEVATIONS AND 35 TO 45
                    PERCENT ELSEWHERE.
20 FOOT WINDS.......NORTHWEST WINDS 4 TO 7 MPH EARLY IN THE
                    EVENING THEN BECOMING DOWNSLOPE/DOWNVALLEY.
RIDGE TOP WINDS.....NORTHWEST AROUND 15 MPH BECOMING NORTH 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.......3800-4800 FT AGL DECREASING TO 400-1000 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....NORTHWEST 9 TO 14 MPH IN THE EVENING THEN DECREASING
                    AND BECOMING NORTH 4 TO 7 MPH.
SMOKE DISPERSAL.....FAIR (53000 KNOT-FT) DECREASING TO POOR (2500
                    KNOT-FT) AFTER 2200L.

.FRIDAY...
SKY/WEATHER.........SUNNY (0-5 PERCENT).
MAX TEMPERATURE.....AROUND 70 AT 7500 FEET AND AROUND 60 AT 10K FEET.
MIN HUMIDITY........16-20 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....NORTH 5 TO 10 MPH IN THE MORNING...DECREASING TO
                    5 MPH BY NOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2600-3600 FT AGL INCREASING TO 6500-7500 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....LIGHT AND VARIABLE WINDS BECOMING NORTHWEST
                    AROUND 5 MPH LATE IN THE MORNING.
SMOKE DISPERSAL.....POOR (15000-35000 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.FRIDAY NIGHT...CLEAR. LOWS IN THE UPPER 30S. WINDS GENERALLY
LESS THAN 10 MPH.
.SATURDAY...CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE UPPER 60S.
WINDS GENERALLY LESS THAN 10 MPH.
.SUNDAY...MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE UPPER
60S. WINDS GENERALLY LESS THAN 10 MPH.
.MONDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
ISOLATED THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS IN THE LOWER
60S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...SKRBAC
REQUESTED BY...LOOKOUT
REASON FOR REQUEST...WILDFIRE
.TAG 20120919.NORTH.01/RIW