FNUS75 KRIW 101444
FWSRIW

SPOT FORECAST FOR UPPER WIND FT6...USFS SHF
NATIONAL WEATHER SERVICE RIVERTON WY
844 AM MDT FRI MAY 10 2013

FORECAST IS BASED ON IGNITION TIME OF 0903 MDT ON MAY 10.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...SOME FURTHER WARMING CAN BE EXPECTED TODAY WITH HIGH
TEMPERATURES A COUPLE OF DEGREES WARMING THAN YESTERDAY. ANOTHER
UPPER LEVEL DISTURBANCE ALONG WITH A WEEK SURFACE FRONT WILL MOVE
THROUGH TODAY OFFERING CHANCES FOR SCATTERED SCATTERED SHOWERS AND
THUNDERSTORMS BY EARLY AFTERNOON TODAY. SATURDAY WILL HAVE A BETTER
CHANCE FOR THUNDERSTORMS FOLLOWED SUNDAY BY SOMEWHAT DRIER AND
WARMER CONDITIONS WHICH WILL LAST THROUGH THE EARLY PORTION OF NEXT
WEEK.


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

FORECASTER...TEAM RIVERTON

.TODAY...
SKY/WEATHER.........PARTLY CLOUDY BECOMING MOSTLY CLOUDY (70-80
                    PERCENT) BY 1200. SCATTERED SHOWERS AND
                    THUNDERSTORMS AFTER 1300.
MAX TEMPERATURE.....61 - 64.
MIN HUMIDITY........24-27 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 6-11 MPH. GUSTS UP TO 15 MPH IN
                    THE AFTERNOON. GUSTY AND ERRATIC WINDS EXPECTED
                    NEAR THUNDERSTORMS AFTER 1300.
RIDGE TOP WINDS.....NORTH 8 TO 13 MPH.
LAL.................1 UNTIL 1200...THEN 4.
CHC OF WETTING RAIN.20 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4200-5200 FT AGL INCREASING TO 9100-10100 FT
                    AGL IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHEAST 9 TO 16 MPH.
SMOKE DISPERSAL.....FAIR TO GOOD (42300-81500 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (50-60 PERCENT). SCATTERED
                    SHOWERS AND THUNDERSTORMS BETWEEN 1800 AND
                    2000...BECOMING ISOLATED SHOWERS THUNDERSTORMS
                    THROUGH 2200.
MIN TEMPERATURE.....31-34.
MAX HUMIDITY........73-76 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 4-7 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS IN THE
                    EVENING.
RIDGE TOP WINDS.....EAST AROUND 15 MPH DECREASING TO AROUND 9 MPH
                    BY 2200...THEN BECOMING LIGHT AND
                    VARIABLE AFTER MIDNIGHT.
LAL.................4 UNTIL 2100...THEN 2 UNTIL 2400...THEN 1.
CHC OF WETTING RAIN.10 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4800-5800 FT AGL DECREASING TO 0-500 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....EAST 6 TO 14 MPH BETWEEN 1800 AND 2200...
                    THEN BECOMING LIGHT AND VARIABLE.
SMOKE DISPERSAL.....POOR TO FAIR (700-40500 KNOT-FT).

.SATURDAY...
SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT) THEN BECOMING
                    MOSTLY CLOUDY (65-75 PERCENT). ISOLATED RAIN
                    SHOWERS IN THE MORNING...THEN SCATTERED SHOWERS
                    AND THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.....AROUND 60.
MIN HUMIDITY........27-30 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING WEST 10 TO 12
                    MPH WITH GUSTS TO AROUND 25 MPH IN THE
                    AFTERNOON. GUSTY AND ERRATIC WINDS EXPECTED
                    NEAR THUNDERSTORMS IN THE AFTERNOON.
RIDGE TOP WINDS.....WEST 5 TO 10 MPH INCREASING TO AROUND 15 MPH
                    LATE IN THE AFTERNOON.
LAL.................1 UNTIL 1200...THEN 4.
CHC OF WETTING RAIN.7 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3600-4600 FT AGL INCREASING TO 8500-9500 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....LIGHT AND VARIABLE WINDS BECOMING WEST 12 TO 18
                    MPH IN THE LATE MORNING AND AFTERNOON.
SMOKE DISPERSAL.....FAIR (42100 KNOT-FT) INCREASING TO VERY GOOD
                    (128500 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY NIGHT...PARTLY CLOUDY. LOWS IN THE MID 30S. WINDS
GENERALLY LESS THAN 10 MPH.
.SUNDAY...PARTLY CLOUDY WITH ISOLATED SHOWERS AND THUNDERSTORMS.
LOWS IN THE UPPER 30S. HIGHS IN THE MID 60S. WINDS GENERALLY LESS
THAN 10 MPH.
.MONDAY...PARTLY CLOUDY. LOWS IN THE UPPER 30S. HIGHS IN THE
UPPER 60S. SOUTHWEST WINDS AROUND 11 MPH.
.TUESDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE MID 30S. HIGHS AROUND 60. WEST WINDS
AROUND 11 MPH.

$$

FORECASTER...BRAUN
REQUESTED BY...JAY SLAGOWSKI
REASON FOR REQUEST...PRESCRIBED
.TAG 20130510.UPPER.01/RIW