FNUS75 KRIW 210311
FWSRIW

SPOT FORECAST FOR GOAT ROCK...JOHNSON COUNTY
NATIONAL WEATHER SERVICE RIVERTON WY
911 PM MDT FRI JUL 20 2012

FORECAST IS BASED ON REQUEST TIME OF 2029 MDT ON JULY 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...A LINE OF THUNDERSTORMS WAS MOVING NORTH...JUST SOUTH
OF HIGHWAY 20/26 AT 2100. IF THESE STORMS HOLD TOGETHER...THEY
WILL REACH THE FIRE AREA AROUND MIDNIGHT. SOME WEAKENING IS
EXPECTED OVER THE NEXT FEW HOURS...BUT EXPECT A WIND SHIFT FROM
THE SOUTH TO SOUTHWEST WITH GUSTS OF 30 TO 40 MPH POSSIBLE AHEAD
OF THESE STORMS LATE THIS EVENING...BETWEEN 2200L AND MIDNIGHT.
SOME ADDITIONAL DEVELOPMENT MAY OCCUR OUT AHEAD OF THE MAIN LINE.

MONSOONAL MOISTURE WILL CONTINUE TO FLOW NORTHWARD OVER THE AREA
OVER THE WEEKEND. THE AIRMASS WILL TREND SLIGHTLY DRIER ON
SATURDAY WITH ONLY ISOLATED THUNDERSTORM COVERAGE EXPECTED.
THUNDERSTORM COVERAGE WILL INCREASE ON SUNDAY AS UPSLOPE FLOW
BRINGS IN BETTER LOW LEVEL MOISTURE.

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

FORECASTER...MEUNIER

.REST OF TONIGHT...
SKY/WEATHER.........MOSTLY CLOUDY WITH ISOLATED THUNDERSTORMS...PRIMARILY BETWEEN
                    2300 AND 0100.  BECOMING PARTLY CLOUDY WITH ISOLATED
                    SHOWERS AFTER 0100.
MIN TEMPERATURE.....61-64.
MAX HUMIDITY........55-58 PERCENT.
20 FOOT WINDS.......NORTH 5 TO 10 MPH WITH GUSTS TO 20 MPH...WITH AN OUTFLOW
                    BOUNDARY...A SHIFT FROM THE SOUTH LIKELY BETWEEN
                    2300L AND MIDNIGHT. ERRATIC WIND GUSTS OF 30 TO 40 MPH
                    POSSIBLE NEAR THUNDERSTORMS. WINDS BECOMING
                    DOWNSLOPE/DOWN VALLEY BETWEEN 0100 AND 0300.
RIDGE TOP WINDS.....SOUTHWEST AROUND 10 MPH SHIFTING TO THE WEST AFTER
                    MIDNIGHT.
LAL.................2 UNTIL 0100...THEN 1.
CHC OF WETTING RAIN.10 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.

.SATURDAY...
SKY/WEATHER.........MOSTLY SUNNY IN THE MORNING (10-20 PERCENT).  BECOMING
                    PARTLY CLOUDY (40-50 PERCENT) IN THE AFTERNOON.
                    ISOLATED SHOWERS AND THUNDERSTORMS AFTER 1400.
MAX TEMPERATURE.....91-94.
MIN HUMIDITY........16-19 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY OR NORTH NORTHEAST 5-9 MPH. GUSTS NEAR
                    20 MPH IN THE AFTERNOON.  GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS IN THE
                    AFTERNOON.
RIDGE TOP WINDS.....WEST SOUTHWEST 5 TO 10 MPH.
LAL.................1 UNTIL 1400...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...
.SATURDAY NIGHT...PARTLY CLOUDY. ISOLATED SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 60S. WINDS GENERALLY LESS THAN
10 MPH.

.SUNDAY...PARTLY CLOUDY. WIDELY SCATTERED AFTERNOON AND EVENING
SHOWERS AND THUNDERSTORMS. LOWS IN THE MID 50S. HIGHS AROUND 90.
WINDS GENERALLY LESS THAN 10 MPH.

.MONDAY...PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS IN THE MID 60S. HIGHS IN THE LOWER 90S. WINDS
GENERALLY LESS THAN 10 MPH.

.TUESDAY...PARTLY CLOUDY. LOWS IN THE LOWER 60S. HIGHS IN THE
LOWER 90S. WINDS GENERALLY LESS THAN 10 MPH.

.WEDNESDAY...MOSTLY CLEAR. LOWS AROUND 60. HIGHS IN THE UPPER
80S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...MEUNIER
REQUESTED BY...BOB BUHR
REASON FOR REQUEST...WILDFIRE
.TAG 20120720.GOATR.01/RIW