FNUS75 KRIW 111411
FWSRIW

SPOT FORECAST FOR HAYSTACK...USFS BTF
NATIONAL WEATHER SERVICE RIVERTON WY
811 AM MDT SUN AUG 11 2013

FORECAST IS BASED ON REQUEST TIME OF 0744 MDT ON AUGUST 11.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

ANOTHER SURGE OF MOISTURE THIS AFTERNOON WILL INCREASE CLOUD COVER
OVER THE FIRE...AND INTRODUCE THE POTENTIAL FOR THUNDERSTORM
DEVELOPMENT. STORMS LOOK FAVORABLE TO DEVELOP NEAR OR OVER THE
FIRE...AND MAY SEND SOME GUSTY WIND OVER THE FIRE. RIDGE OF HIGH
PRESSURE CONTINUES TO STRENGTHEN OVERNIGHT...AND WILL RESULT IN
LOWER HUMIDITY OVER THE FIRE FOR MONDAY. WHILE THUNDERSTORM
ACTIVITY IS NOT EXPECTED TO PASS DIRECTLY OVER THE FIRE MONDAY
AFTERNOON...THERE WILL BE NEARBY STORM ACTIVITY WHICH MAY AGAIN
SEND SOME GUSTY AND ERRATIC WIND OVER THE FIRE. GENERAL DRYING
TREND EXPECTED TO GAIN MOMENTUM BY THE MIDDLE OF THE WEEK.

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

FORECASTER...BRANHAM

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (50-60 PERCENT) BY 1000. ISOLATED
                    SHOWERS AND THUNDERSTORMS INITIATING AROUND
                    1100 WITH COVERAGE INCREASING THROUGH 1600...
                    THEN TAPERING OFF THROUGH 1800.
MAX TEMPERATURE.....76-79.
MIN HUMIDITY........16-19 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH. GUSTY AND ERRATIC
                    WINDS TO 35 MPH EXPECTED WITH NEARBY
                    THUNDERSTORMS THIS AFTERNOON.
RIDGE TOP WINDS.....WEST 5 TO 10 MPH.
LAL.................1 UNTIL 1100...THEN 2.
CHC OF WETTING RAIN.4 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT).
MIN TEMPERATURE.....46-49.
MAX HUMIDITY........50-53 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 4-7 MPH.
RIDGE TOP WINDS.....WEST AROUND 5 MPH SHIFTING TO THE SOUTH BY
                    2100.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.

.MONDAY...
SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT). WIDELY SCATTERED
                    SHOWERS AND THUNDERSTORMS ANTICIPATED WITHIN
                    10 TO 20 MILES OF THE FIRE.
MAX TEMPERATURE.....75-78.
MIN HUMIDITY........13-16 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH. GUSTY WIND TO 35 MPH
                    POSSIBLE FROM NEARBY THUNDERSTORM ACTIVITY.
RIDGE TOP WINDS.....SOUTH AROUND 5 MPH SHIFTING TO THE WEST BY
                    1300.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.

.FORECAST DAYS 3 THROUGH 5...
.MONDAY NIGHT...PARTLY CLOUDY. LOWS IN THE LOWER 50S. WINDS
GENERALLY LESS THAN 10 MPH.

.TUESDAY...MOSTLY CLEAR. ISOLATED SHOWERS AND THUNDERSTORMS. LOWS
IN THE MID 40S. HIGHS IN THE MID 70S. WINDS GENERALLY LESS THAN
10 MPH.

.WEDNESDAY...MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE
UPPER 70S. WINDS GENERALLY LESS THAN 10 MPH.

.THURSDAY...MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE UPPER
70S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...BRANHAM
REQUESTED BY...MIKE JOHNSTON
REASON FOR REQUEST...WILDFIRE
.TAG 20130811.HAYST.01/RIW