Suppression Forecast
Issued by NWS Riverton, WY

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000
FNUS75 KRIW 211054
FWSRIW

SPOT FORECAST FOR LITTLE BOB LAKE...BIA WRA
NATIONAL WEATHER SERVICE RIVERTON WY
454 AM MDT FRI AUG 21 2015

FORECAST IS BASED ON REQUEST TIME OF 2106 MDT ON AUGUST 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 6 AM MDT
SATURDAY...

.DISCUSSION...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO
6 AM MDT SATURDAY MORNING FOR EXTREME FIRE WEATHER DANGER. WINDS WILL
BE ON THE INCREASE...WHILE RH WILL BE DECREASING THROUGH THE DAY
AHEAD OF AN APPROACHING COLD FRONT. WIND GUSTS WILL PEAK THIS EVENING
AFTER 6 PM AS THE COLD FRONT PASSES THE FIRE AREA...WITH GUSTS UP TO
50 MPH POSSIBLE. WITH LIMITED MOISTURE TO WORK WITH...MAINLY DRY
CONDITIONS ARE EXPECTED WITH THE PASSAGE OF THIS FRONT. WINDS WILL
THEN BEGIN TO DIMINISH AFTER 3 AM TONIGHT...WITH SOME GUSTY BREEZES
CONTINUING THROUGH SATURDAY MORNING. THE REST OF SATURDAY WILL SEE
COOLER TEMPERATURES...DIMINISHING WINDS...AND A SLIGHT REBOUND IN RH.
HAZE AND SMOKE FROM WILDFIRES IN THE WESTERN U.S. WILL CONTINUE TO
LINGER ACROSS THE STATE THROUGH THE WEEKEND.

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

FORECASTER...ANGLIN

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (40-50 PERCENT). HAZE AND SMOKE.
MAX TEMPERATURE.....69-72.
MIN HUMIDITY........12-15 PERCENT.
20 FOOT WINDS.......BREEZY. WEST SOUTHWEST WINDS 6 TO 12 MPH INCREASING
                    TO 21 TO 26 MPH WITH GUSTS TO AROUND 45 MPH
                    AFTER 9 AM.
RIDGE TOP WINDS.....WEST 30 TO 40 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 TO 5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3000-4000 FT AGL INCREASING TO 8400-9400 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 33 TO 40 MPH.
SMOKE DISPERSAL.....VERY GOOD (100800 KNOT-FT) INCREASING TO
                    EXCELLENT (283700 KNOT-FT) IN THE AFTERNOON.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT). HAZE AND SMOKE
                    TO CONTINUE.
MIN TEMPERATURE.....AROUND 40.
MAX HUMIDITY........53-56 PERCENT.
20 FOOT WINDS.......BREEZY. WEST SOUTHWEST WINDS INCREASING AFTER
                    6 PM TO 28 TO 32 MPH WITH GUSTS UP TO 50 MPH.
                    WINDS DECREASING AND BECOMING WEST NORTHWEST
                    AT 14 TO 25 MPH AFTER 3 AM WITH GUSTS
                    DECREASING TO 30-40 MPH.
RIDGE TOP WINDS.....WEST AROUND 40 TO 50 MPH WITH GUSTS 55 TO 60 MPH
                    POSSIBLE. WINDS DECREASING TO AROUND 30 MPH
                    AFTER 3 AM.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH...DECREASING TO 2 - 3
                    AFTER MIDNIGHT.
MIXING HEIGHT.......5900-6900 FT AGL DECREASING TO 600-1600 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....WEST AROUND 40 MPH DECREASING TO AROUND 30 MPH
                    AFTER 3 AM.
SMOKE DISPERSAL.....EXCELLENT (214800 KNOT-FT) DECREASING TO POOR
                    (33200 KNOT-FT) AFTER MIDNIGHT.

.SATURDAY...

SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT). HAZE AND SMOKE.
MAX TEMPERATURE.....59-62.
MIN HUMIDITY........21-24 PERCENT.
20 FOOT WINDS.......WEST WINDS AROUND 12-18 MPH BECOMING
                    UPSLOPE/UPVALLEY 5-9 MPH IN THE AFTERNOON.
                    GUSTS UP TO 25 MPH.
RIDGE TOP WINDS.....NORTHWEST 15 TO 25 MPH...DIMINISHING TO 10 TO 15
                    MPH IN THE AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........2 TO 3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2200-3200 FT AGL INCREASING TO 5400-6400 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 20 TO 25 MPH.
SMOKE DISPERSAL.....FAIR TO VERY GOOD (50500-100000 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY NIGHT...
MOSTLY CLEAR WITH HAZE AND SMOKE. LOWS IN THE MID 30S. WINDS GENERALLY LESS
THAN 10 MPH.

.SUNDAY...
CLEAR...WITH HAZE AND SMOKE. LOWS IN THE MID 30S. HIGHS AROUND 70. WINDS
GENERALLY AROUND 10 MPH WITH SOME HIGHER GUSTS IN THE AFTERNOON.

.MONDAY...
PARTLY CLOUDY. SLIGHT CHANCE OF AN ISOLATED THUNDERSTORM. LOWS IN THE LOWER
40S. HIGHS IN THE LOW TO MID 70S. WINDS GENERALLY AROUND 10 MPH WITH SOME
HIGHER GUSTS AT TIMES.

.TUESDAY...
PARTLY CLOUDY. SLIGHT CHANCE OF THUNDERSTORMS. LOWS IN THE MID
40S. HIGHS IN THE LOWER TO MID 70S. WINDS GENERALLY LESS THAN 10 MPH.

$$
FORECASTER...ANGLIN
REQUESTED BY...CLINT DAWSON
TYPE OF REQUEST...WILDFIRE
.TAG 20150820.LITTL.02/RIW


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