Suppression Forecast
Issued by NWS Riverton, WY

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331
FNUS75 KRIW 141047
FWSRIW

Spot Forecast for Sylvan Bay Piles...USFS
National Weather Service Riverton WY
347 AM MST Tue Nov 14 2017

Forecast is based on ignition time of 0900 MST on November 14.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...A band of rain and snow showers to the northwest of
the area early Tuesday morning, will move across the area in the
mid to late morning. Light snow accumulations of less than an inch
are expected. Gusty northwest winds and partial clearing occur
through the afternoon. Temperatures will trend cooler, RHs higher
today. Drier and slightly warmer conditions on Wednesday before
the next Pacific storm system begins to push precipitation into
the area Wednesday night and Thursday.

...Thunderstorms imply strong gusty and erratic winds...
...Haines index is high level haines both day and night...

FORECASTER...Meunier

.TODAY...

Sky/weather.........Cloudy with occasional light snow developing in
                    the morning.  Light snow tapering off by noon,
                    then becoming partly cloudy (40-50 percent)
                    in the afternoon.
Max temperature.....36-39.
Min humidity........48-51 percent.
20-foot winds.......West 5 to 10 mph with gusts 15 to 20 mph in the morning.
                    Northwest 15 to 20 mph with gusts near 30 mph in the
                    afternoon.
Ridge top winds.....West around 15 mph in the morning. Northwest
                    20 to 25 mph in the afternoon.
LAL.................No Tstms.
Chc of wetting rain.25 percent.
Haines Index........2 or very low potential for large plume
                    dominated fire growth.
Mixing height.......1500 to 2000 ft AGL until 1200, then 6000 to
                    6500 ft AGL in the afternoon.
Transport winds.....Southwest 15 to 20 mph shifting to the west
                    around 25 mph in the afternoon.
Smoke dispersal.....Poor to fair in the morning,
                    increasing to very good in the afternoon.

.TONIGHT...

Sky/weather.........Mostly clear (20-30 percent).
Min temperature.....13-16.
Max humidity........74-77 percent.
20-foot winds.......Northwest 5 to 10 mph with gusts to 15 mph
                    early evening, then downslope/downvalley 4-7 mph.
Ridge top winds.....North around 10 mph shifting to the northeast early
                    in the morning.
LAL.................No Tstms.
Chc of wetting rain.Zero percent.
Haines Index........2 or very low potential for large plume
                    dominated fire growth.
Mixing height.......2200 ft AGL until 2400, then 500 FT AGL.
Transport winds.....Northwest 10 to 14 mph shifting to the west
                    early in the morning.
Smoke dispersal.....Poor to fair.

.WEDNESDAY...

Sky/weather.........Mostly sunny early (25-35 percent), increasing
                    clouds through the late morning and
                    afternoon, becoming mostly cloudy (60-70 percent)
                    after 3 pm.
Max temperature.....38-41.
Min humidity........35-38 percent.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....South around 10 mph.
LAL.................No Tstms.
Chc of wetting rain.Zero percent.
Haines Index........2 or very low potential for large plume
                    dominated fire growth.
Mixing height.......800-1300 ft AGL.
Transport winds.....Northwest around 10 mph shifting to the
                    southwest in the late morning and afternoon.
Smoke dispersal.....Poor.

.FORECAST DAYS 3 THROUGH 5...

.WEDNESDAY NIGHT...
Not as cold. Chance of snow in the evening, then snow likely after
midnight. Lows in the upper 20s. Winds generally less than
10 mph.

.THURSDAY...
Snow. Highs in the mid 30s. South wind around 10 mph.

.FRIDAY...
Mostly cloudy. Snow likely. Lows in the lower 20s. Highs in the
upper 20s. Winds generally less than 10 mph.

.SATURDAY...
Partly cloudy. Lows around 11. Highs in the upper 20s. Winds
generally less than 10 mph.

$$
Forecaster...Meunier
Requested by...Dave Wilkins
Type of request...PRESCRIBED
.TAG 1718606.2/RIW
.EMAIL dawilkins@fs.fed.us



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