FNUS75 KRIW 202050
FWSRIW

SPOT FORECAST FOR NORTON...USFS
NATIONAL WEATHER SERVICE RIVERTON WY
250 PM MDT SAT AUG 20 2011

FORECAST IS BASED ON REQUEST TIME OF 1423 MDT ON AUGUST 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

INCREASING CLOUDS INTO THIS EVENING WITH ISOLATED SHOWERS AND
THUNDERSTORMS IN THE AREA. GUSTY WINDS TO 40 MPH AND FREQUENT
LIGHTING WILL BE THE MAIN THREATS WITH THESE STORMS. THE RIDGE
AXIS SHIFTS NORTH AND EAST TOMORROW. IT WILL BE A BIT DRIER BUT
THERE WILL STILL BE SOME SHOWERS AND THUNDERSTORMS AROUND WITH A
GREATER THREAT OF GUSTY AND ERRATIC WINDS. HIGH PRESSURE WILL
BUILD OVER THE AREA THROUGH THE WEEK...GRADUALLY WARMING AND
DRYING. THE RIDGE COULD POSSIBLY BREAK DOWN TOWARD THE END OF THE
WEEK...BRINGING SHOWERS AND THUNDERSTORMS BACK INTO THE FORECAST.

FLOW WILL BE RELATIVELY LIGHT AND FROM THE WEST UNDERNEATH THE
HIGH. WINDS WILL BE DOMINATED BY NEARBY SHOWERS AND
THUNDERSTORMS...AND DRAINAGE WHEN STORMS ARE NOT PRESENT.

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

FORECASTER...ALLEN

.REST OF TODAY...
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT). ISOLATED SHOWERS
                    AND THUNDERSTORMS.
MAX TEMPERATURE.....73-76.
MIN HUMIDITY........15-18 PERCENT.
20 FOOT WINDS.......SOUTHWEST 5 TO 8 MPH BECOMING WEST 10 TO 15
                    MPH WITH HIGHER GUSTS LATE IN THE AFTERNOON.
                    GUSTY AND ERRATIC WINDS EXPECTED NEAR
                    THUNDERSTORMS.
RIDGE TOP WINDS.....SOUTHWEST AROUND 15 MPH BECOMING WEST BY 1800.
LAL.................2.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT). ISOLATED SHOWERS
                    AND THUNDERSTORMS IN THE EVENING.
MIN TEMPERATURE.....38-42.
MAX HUMIDITY........50-60 PERCENT.
20 FOOT WINDS.......WEST WINDS 10 TO 11 MPH AND GUSTY EARLY IN THE
                    EVENING BECOMING DOWNSLOPE/DOWNVALLEY 4-7 MPH.
                    GUSTY AND ERRATIC WINDS EXPECTED NEAR
                    THUNDERSTORMS IN THE EVENING.
RIDGE TOP WINDS.....WEST 10 TO 15 MPH SHIFTING TO THE NORTHWEST
                    5 TO 8 MPH AFTER MIDNIGHT.
LAL.................2 UNTIL 2400...THEN 1.
CHC OF WETTING RAIN.5 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.

.SUNDAY...
SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (45-55 PERCENT). ISOLATED
                    SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.....75-78.
MIN HUMIDITY........17-20 PERCENT.
20 FOOT WINDS.......SOUTHWEST 5-9 MPH WITH HIGHER GUSTS IN THE
                    AFTERNOON BECOMING NORTHWEST 5 TO 8 MPH
                    BY THE EVENING. GUSTY AND ERRATIC WINDS
                    EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON.
RIDGE TOP WINDS.....WEST AROUND 10 MPH INCREASING TO AROUND 15 MPH
                    IN THE AFTERNOON SHIFTING TO THE NORTHWEST
                    AT AROUND 10 MPH TOWARD EVENING.
LAL.................1 UNTIL 1200...THEN 2.
CHC OF WETTING RAIN.5 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.

.FORECAST DAYS 3 THROUGH 5...
.SUNDAY NIGHT...PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE EVENING. LOWS IN THE LOWER 40S. WINDS
GENERALLY LESS THAN 10 MPH.
.MONDAY...PARTLY CLOUDY. LOWS IN THE LOWER 40S. HIGHS IN THE MID
70S. WINDS GENERALLY LESS THAN 10 MPH.
.TUESDAY...MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE MID
70S. WINDS GENERALLY LESS THAN 10 MPH.
.WEDNESDAY...MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE
MID 70S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...ALLEN
REQUESTED BY...LELAND BLACK
REASON FOR REQUEST...WILDFIRE
.TAG 20110820.NORTO.01/RIW