FNUS75 KRIW 212056
FWSRIW

SPOT FORECAST FOR WASHAKIE PILES...USFS SHF
NATIONAL WEATHER SERVICE RIVERTON WY
256 PM MDT THU JUN 21 2012

FORECAST IS BASED ON IGNITION TIME OF 1600 MDT ON JUNE 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...RED FLAG WARNING IN EFFECT FROM NOON TO 8 PM MDT FRIDAY...

.DISCUSSION...UPPER LEVEL HIGH PRESSURE IS BUILDING OVER THE AREA
TODAY AND TOMORROW. LOW HUMIDITIES WILL CONTINUE TOMORROW WITH
POOR RECOVERY OVERNIGHT. THE PATTERN IS CREATING RELATIVELY LIGHT
WINDS THROUGH 0900 FRIDAY...WITH STRONGER SOUTHWEST FLOW
DEVELOPING AROUND 1200 FRIDAY AND INTO THE AFTERNOON. NOTE THAT A
RED FLAG WARNING IS IN EFFECT FOR THE BURN AREA FROM 1200 THROUGH
2000 FRIDAY WITH ZONE 288 DECLARED AS HAVING CRITICAL FUELS. VERY
LITTLE CLOUD COVER IS EXPECTED FOR THE NEXT 24 HOURS...BUT GUSTS
AROUND 30 MPH EXPECTED FRIDAY AFTERNOON.


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

FORECASTER...MCDONALD

.REST OF TODAY...
SKY/WEATHER.........MOSTLY SUNNY (5-15 PERCENT).
MAX TEMPERATURE.....70-74.
MIN HUMIDITY........20-25 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 4-8 MPH.
RIDGE TOP WINDS.....SOUTHWEST AROUND 12 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE
                    GROWTH.
MIXING HEIGHT.......8500 FT AGL.
TRANSPORT WINDS.....SOUTHWEST AROUND 15 MPH.
SMOKE DISPERSAL.....VERY GOOD (127500 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).
MIN TEMPERATURE.....44-48.
MAX HUMIDITY........40-50 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 4-7 MPH. GUSTS UP TO 10
                    MPH AFTER MIDNIGHT.
RIDGE TOP WINDS.....SOUTHWEST AROUND 10 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......6000-7000 FT AGL DECREASING TO 2000 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....WEST AROUND 13 MPH SHIFTING TO THE SOUTH AROUND
                    10 MPH AFTER MIDNIGHT.
SMOKE DISPERSAL.....GOOD (92000 KNOT-FT) BECOMING POOR (20000 KNOT-FT).

.FRIDAY...
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT).
MAX TEMPERATURE.....74-77.
MIN HUMIDITY........AROUND 10 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS AROUND 10 MPH WITH HIGHER GUSTS
                    EARLY INCREASING TO 15 TO 18 MPH WITH GUSTS TO
                    AROUND 30 MPH IN THE AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST AROUND 15 MPH INCREASING TO 25 TO 30
                    MPH IN THE AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......6000 FT AGL INCREASING TO 11000 FT AGL IN
                    THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 15 TO 20 MPH INCREASING TO AROUND 30
                    MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....GOOD (90000 KNOT-FT) INCREASING TO
                    EXCELLENT (300000 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.FRIDAY NIGHT...MOSTLY CLEAR. LOWS IN THE UPPER 40S. WEST WINDS
AROUND 15 MPH.
.SATURDAY...MOSTLY CLEAR. LOWS IN THE LOWER 50S. HIGHS IN THE MID
70S. SOUTHWEST WINDS AROUND 15 MPH.
.SUNDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE UPPER 40S. HIGHS IN THE MID 70S.
SOUTHWEST WINDS AROUND 12 MPH.
.MONDAY...MOSTLY CLOUDY WITH CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS IN THE UPPER 40S. HIGHS IN THE LOWER 70S. SOUTHWEST WINDS
AROUND 12 MPH.

$$

FORECASTER...MCDONALD
REQUESTED BY...ANDY MCWILLIAMS
REASON FOR REQUEST...PRESCRIBED
.TAG 20120621.WASHA.01/RIW