FNUS75 KRIW 250029
FWSRIW

SPOT FORECAST FOR FAIRFIELD...USFS SHF
NATIONAL WEATHER SERVICE RIVERTON WY
629 PM MDT WED JUL 24 2013

FORECAST IS BASED ON REQUEST TIME OF 1617 MDT ON JULY 24.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...HIGH PRESSURE OVER THE NORTHERN PLAINS AND LOW
PRESSURE OVER THE GREAT BASIN WILL RESULT IN A NORTHEAST SURFACE
UP THROUGH RIDGE TOP WIND FIELD ON THURSDAY. THESE WINDS WILL
BECOME GUSTY THROUGH THE CANYON WALLS BELOW 8000 FEET IN THE LATE
MORNING AND AFTERNOON. THE UPSLOPE FLOW WILL ALSO RESULT IN A FEW
AFTERNOON/EVENING SHOWERS AND THUNDERSTORMS DEVELOPING OVER THE
AREA. A DRIER NORTHWEST FLOW ALOFT WILL FOLLOW ON FRIDAY...THOUGH
LOW LEVEL WINDS ARE EXPECTED TO REMAIN PRIMARILY UP CANYON. A
STRAY THUNDERSTORM CANNOT BE RULED OUT ON FRIDAY. SUB-TROPICAL
MOISTURE WILL ROTATE BACK IN OVER THE WEEKEND FOR BETTER CHANCES
OF SHOWERS AND THUNDERSTORMS.


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

FORECASTER...MEUNIER

.THURSDAY...
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). ISOLATED AFTERNOON
                    SHOWERS AND THUNDERSTORMS.
MAX TEMPERATURE.....78 TO 80 AT CANYON FLOOR...70 TO 75 BETWEEN 8500
                    AND 9000 FEET.
MIN HUMIDITY........23-26 PERCENT.

20 FOOT WINDS.......SOUTHWEST 4 TO 7 MPH UNTIL 9 AM...BECOMING NORTHEAST
                    OR UP CANYON 7 TO 12 MPH LATE MORNING WITH GUSTS 15
                    TO 20 MPH THROUGH THE CANYON IN THE AFTERNOON.  GUSTY
                    AND ERRATIC WINDS NEAR ANY THUNDERSTORMS.
RIDGE TOP WINDS.....NORTH 5 TO 10 MPH...BECOMING NORTHEAST 10 TO 15 MPH IN
                    THE LATE MORNING AND AFTERNOON.

LAL.................1 UNTIL 1200...THEN 3.
CHC OF WETTING RAIN.5 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.

MIXING HEIGHT.......2000-3000 FT AGL IN THE EARLY MORNING...7800-8800 FT AGL
                    IN THE LATE MORNING AND AFTERNOON.
TRANSPORT WINDS.....NORTHEAST AROUND 10 MPH IN THE MORNING...BECOMING
                    WEST AROUND 15 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....FAIR IN THE MORNING...BECOMING VERY GOOD
                    (10500 KNOT-FT) IN THE AFTERNOON.

.THURSDAY NIGHT...
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (55-65 PERCENT). ISOLATED EVENING SHOWERS
                    AND THUNDERSTORMS.
MIN TEMPERATURE.....47-56.
MAX HUMIDITY........63-73 PERCENT.

20 FOOT WINDS.......UP CANYON 5-10 MPH UNTIL AROUND SUNSET...THEN
                    DOWNSLOPE/DOWNVALLEY 4-8 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS.
RIDGE TOP WINDS.....NORTHEAST 5 TO 10 MPH SHIFTING TO THE WEST AFTER
                    MIDNIGHT.

LAL.................3 UNTIL 2200...THEN 1.
CHC OF WETTING RAIN.10 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH.

MIXING HEIGHT.......5400-6400 FT AGL DECREASING TO 1200-2200 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH.
SMOKE DISPERSAL.....POOR TO FAIR (11900-58700 KNOT-FT).

.FRIDAY...
SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT).  AN ISOLATED AFTERNOON
                    SHOWER OR THUNDERSTORM POSSIBLE.
MAX TEMPERATURE.....72-81.
MIN HUMIDITY........18-23 PERCENT.

20 FOOT WINDS.......SOUTHWEST 4-7 MPH UNTIL AROUND 0900...THEN NORTHEAST
                    OR UP CANYON 5 TO 10 MPH WITH GUSTS TO 15 MPH IN THE
                    AFTERNOON.  GUSTY AND ERRATIC WINDS EXPECTED NEAR
                    THUNDERSTORMS.
RIDGE TOP WINDS.....WEST AROUND 10 MPH.

LAL.................1 UNTIL 1200...THEN 2.
CHC OF WETTING RAIN.5 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.

MIXING HEIGHT.......2700-3700 FT AGL INCREASING TO 8400-9400 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHEAST 5 TO 10 MPH IN THE MORNING.  WEST 10 TO 15 MPH
                    IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR TO FAIR IN THE MORNING...VERY GOOD IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.FRIDAY NIGHT...PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS
IN THE EVENING. LOWS IN THE LOWER 50S. WINDS GENERALLY LESS THAN
10 MPH.

.SATURDAY...PARTLY CLOUDY WITH SCATTERED SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 50S. HIGHS IN THE MID 70S. WINDS
GENERALLY LESS THAN 10 MPH.

.SUNDAY...PARTLY CLOUDY WITH CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS IN THE LOWER 50S. HIGHS IN THE MID 70S. WINDS GENERALLY LESS
THAN 10 MPH.

.MONDAY...PARTLY CLOUDY WITH CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS IN THE LOWER 50S. HIGHS IN THE UPPER 70S. WINDS GENERALLY
LESS THAN 10 MPH.

$$

FORECASTER...MEUNIER
REQUESTED BY...SID HALL
REASON FOR REQUEST...WILDFIRE
.TAG 20130724.FAIRF.02/RIW