FNUS75 KRIW 202300
FWSRIW

SPOT FORECAST FOR NORTH FORK...USFS SHF
NATIONAL WEATHER SERVICE RIVERTON WY
500 PM MDT FRI AUG 20 2010

FORECAST IS BASED ON REQUEST TIME OF 1602 MDT ON AUGUST 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH
SATURDAY EVENING...

.DISCUSSION...A FIRE WEATHER WATCH IS IN EFFECT FROM SATURDAY AFTERNOON
THROUGH SUNDAY EVENING. NO MAJOR CHANGES TO THE FORECAST ADVERTISED THE LAST
FEW DAYS. SOUTHWEST FLOW WILL CONTINUE TO INCREASE OVER THE
WEEKEND AHEAD OF A STRONG COLD FRONT DUE TO PASS THROUGH THE AREA
SUNDAY AFTERNOON/EVENING. WINDS WILL DECREASE AT THE BASE OF THE
FIRE THIS EVENING BUT WILL LIKELY REMAIN GUSTY AT RIDGE TOP LEVEL
ALONG WITH POOR RELATIVE HUMIDITY RECOVERY TONIGHT. THE TREND ON
SATURDAY WILL BE WARMER...WINDIER AND DRIER THAN TODAY WITH WINDS
PICKING UP DURING THE MORNING. ISOLATED THUNDERSTORMS WILL BEGIN PUSHING
INTO WESTERN WYOMING OVERNIGHT SATURDAY. WINDS ARE ALSO EXPECTED
TO PERSIST THROUGH SATURDAY NIGHT AT EVEN INCREASE AT RIDGETOP
LEVEL. MORE CLOUDS AND HIGHER RELATIVE HUMIDITY ARE EXPECTED
SUNDAY ALONG WITH WIDELY SCATTERED THUNDERSTORMS AND VERY WINDY
CONDITIONS AHEAD OF THE COLD FRONT.


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

FORECASTER...MEUNIER

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (0-10 PERCENT).
MIN TEMPERATURE.....46-49.
MAX HUMIDITY........45-50 PERCENT.  RELATIVE HUMIDITY WILL LIKELY RECOVER
                    THIS EVENING AND DROP INTO THE 25 TO 30 PERCENT
                    EARLY SATURDAY MORNING.
20 FOOT WINDS.......SOUTHWEST WINDS 8 TO 13 MPH...WITH GUSTS
                    25 TO 30 MPH THROUGH SUNSET...THEN GUSTS 15 TO 20 MPH
                    OVERNIGHT.
RIDGE TOP WINDS.....SOUTHWEST 20 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.

.SATURDAY...
SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT).
MAX TEMPERATURE.....74-77.
MIN HUMIDITY........14-17 PERCENT.
20 FOOT WINDS.......SOUTHWEST INCREASING TO 15 TO 20 MPH WITH GUSTS TO 30 MPH
                    BETWEEN 0900 AND 1100.
RIDGE TOP WINDS.....SOUTHWEST 23 TO 28 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.

.SATURDAY NIGHT...
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT). SLIGHT CHANCE OF
                    SHOWERS AND THUNDERSTORMS MAINLY AFTER MIDNIGHT.
MIN TEMPERATURE.....50-53.
MAX HUMIDITY........51-54 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS 14 TO 23 MPH. GUSTS TO 40 MPH
                    AFTER MIDNIGHT. GUSTY AND ERRATIC WINDS EXPECTED
                    NEAR THUNDERSTORMS.
RIDGE TOP WINDS.....SOUTHWEST 20 TO 25 MPH INCREASING TO 30 TO 35 MPH
                    AFTER MIDNIGHT.
LAL.................2.
CHC OF WETTING RAIN.3 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY NIGHT...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 50S. SOUTHWEST WINDS AROUND
18 MPH.
.SUNDAY...PARTLY CLOUDY WITH CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS IN THE LOWER 40S. HIGHS IN THE LOWER 70S. SOUTHWEST WINDS
AROUND 17 MPH.
.MONDAY...COOLER. MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS AROUND
60. WINDS GENERALLY LESS THAN 10 MPH.
.TUESDAY...MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE
UPPER 60S. WINDS GENERALLY LESS THAN 10 MPH.
.WEDNESDAY...PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON AND EVENING. LOWS IN THE LOWER
40S. HIGHS IN THE UPPER 60S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...MEUNIER
REQUESTED BY...CATHY HUTTON
REASON FOR REQUEST...WILDFIRE
.TAG 20100820.NORTH.01/RIW