FNUS75 KRIW 200942
FWSRIW

SPOT FORECAST FOR BLACK...USFS BTF
NATIONAL WEATHER SERVICE RIVERTON WY
342 AM MDT TUE AUG 20 2013

FORECAST IS BASED ON IGNITION TIME OF 1422 MDT ON AUGUST 19.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

A WAVE OF MID LEVEL MOISTURE ARRIVES EARLY THIS MORNING WITH
MOSTLY CLOUDY SKIES EXPECTED FOR MOST OF THE DAY TODAY. MANY
OF THESE CLOUDS WILL PRODUCE SOME RAIN WITH A CHANCE OF AN
EMBEDDED THUNDERSTORM OR TWO IN THE AFTERNOON. THERE IS NOT A
LOT OF MOISTURE AVAILABLE FOR RAIN SO SHOWERS WILL BE LIGHT WITH
THE CHANCES OF WETTING RAIN ON THE LOW SIDE. CHANCES FOR WETTING
RAINS INCREASE ON WEDNESDAY AND CONTINUE THROUGH THE END OF THE
WORK WEEK AS SEVERAL MORE WAVES OF MOISTURE MOVE INTO THE REGION
WITH A DRYING TREND FOR THE WEEKEND.

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

FORECASTER...ALLEN

.TODAY...
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). ISOLATED RAIN
                    SHOWERS IN THE MORNING...THEN SCATTERED RAIN
                    SHOWERS AND ISOLATED THUNDERSTORMS IN THE
                    AFTERNOON.
MAX TEMPERATURE.....71.
MIN HUMIDITY........25 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING SOUTHWEST
                    5-9 MPH AFTER 1100. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS IN THE
                    AFTERNOON.
RIDGE TOP WINDS.....NORTHWEST AROUND 5 MPH SHIFTING TO THE WEST 10
                    TO 15 MPH IN THE LATE MORNING AND AFTERNOON.
LAL.................1 UNTIL 1200...THEN 2.
CHC OF WETTING RAIN.5 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT). ISOLATED SHOWERS
                    AND THUNDERSTORMS.
MIN TEMPERATURE.....50.
MAX HUMIDITY........65 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 4-7 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS.
RIDGE TOP WINDS.....WEST AROUND 10 MPH SHIFTING TO THE NORTH LATE
                    IN THE EVENING...THEN SHIFTING TO THE SOUTH
                    AFTER MIDNIGHT.
LAL.................2.
CHC OF WETTING RAIN.8 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.

.WEDNESDAY...
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT) THEN BECOMING
                    MOSTLY CLOUDY (70-80 PERCENT). ISOLATED SHOWERS
                    AND THUNDERSTORMS IN THE MORNING...THEN
                    SCATTERED SHOWERS AND THUNDERSTORMS IN THE
                    AFTERNOON.
MAX TEMPERATURE.....70.
MIN HUMIDITY........30 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS.
RIDGE TOP WINDS.....WEST AROUND 5 MPH SHIFTING TO THE SOUTHWEST 10
                    TO 15 MPH IN THE AFTERNOON.
LAL.................2 UNTIL 1200...THEN 4.
CHC OF WETTING RAIN.30 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.

.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY NIGHT...PARTLY CLOUDY. SCATTERED SHOWERS AND
THUNDERSTORMS IN THE EVENING...THEN ISOLATED SHOWERS AND
THUNDERSTORMS AFTER MIDNIGHT. LOWS IN THE UPPER 40S. WINDS
GENERALLY LESS THAN 10 MPH.
.THURSDAY...PARTLY CLOUDY WITH ISOLATED SHOWERS AND
THUNDERSTORMS. LOWS IN THE UPPER 40S. HIGHS IN THE UPPER 70S.
WINDS GENERALLY LESS THAN 10 MPH.
.FRIDAY...PARTLY CLOUDY. LOWS IN THE MID 40S. HIGHS IN THE UPPER
70S. WINDS GENERALLY LESS THAN 10 MPH.
.SATURDAY...PARTLY CLOUDY WITH ISOLATED SHOWERS AND
THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS AROUND 70. WINDS
GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...ALLEN
REQUESTED BY...IC
REASON FOR REQUEST...PRESCRIBED
.TAG 20130819.BLACK.01/RIW