Suppression Forecast
Issued by NWS Riverton, WY

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FNUS75 KRIW 161203
FWSRIW

Spot Forecast for Sylvan Bay Piles...USFS
National Weather Service Riverton WY
503 AM MST Thu Nov 16 2017

Forecast is based on ignition time of 0900 MST on November 16.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...Unsettled weather today through Friday. Periods
of mixed rain and snow today with mainly snow tonight and Friday.
Conditions dry out Saturday. Dry weather is forecast Sunday and
Monday.

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

FORECASTER...AR

.TODAY...

Sky/weather.........Cloudy. Periods of snow, mixed with rain at
                    times.
Max temperature.....35-38.
Min humidity........60-65 percent.
20-foot winds.......South to southeast at 6 to 10 mph with
                    gusts around 15 mph.

Ridge top winds.....South to southwest at 10 to 15 mph with
                    gusts around 20 mph.
LAL.................No Tstms.
Chc of wetting rain.93 percent.
Haines Index........2 or very low potential for large plume
                    dominated fire growth.
Mixing height.......2000-3000 ft AGL.
Transport winds.....South to southwest around 15 mph.
Smoke dispersal.....Poor.

.TONIGHT...

Sky/weather.........Cloudy. Periods of snow.
Min temperature.....25-28.
Max humidity........90-93 percent.
20-foot winds.......Southwest at 6 to 10 mph with gusts around 15 mph.

Ridge top winds.....Southwest at 10 to 15 mph with gusts around 20 mph.
LAL.................No Tstms.
Chc of wetting rain.93 percent.
Haines Index........2 or very low potential for large plume
                    dominated fire growth.
Mixing height.......500-1000 ft AGL.
Transport winds.....Southwest around 10 mph.
Smoke dispersal.....Poor.

.FRIDAY...

Sky/weather.........Cloudy. Snow likely in the morning.
                    Scattered snow showers in the afternoon.
Max temperature.....29-32.
Min humidity........63-66 percent.
20-foot winds.......West to northwest wind at 10 to 15 mph
                    with gusts around 20 mph.

Ridge top winds.....West to northwest at 15 to 20 mph with
                    gusts around 25 mph.
LAL.................No Tstms.
Chc of wetting rain.54 percent.
Haines Index........2 or very low potential for large plume
                    dominated fire growth.
Mixing height.......2000-2500 ft AGL.
Transport winds.....West to northwest at 20 mph.
Smoke dispersal.....Poor in the morning. Poor to Fair in the
                    afternoon.

.FORECAST DAYS 3 THROUGH 5...

.FRIDAY NIGHT...
Mostly cloudy. Chance of snow in the early evening. Lows around 10.
Winds generally less than 10 mph.

.SATURDAY...
Mostly clear. Highs in the upper 20s.
Winds generally less than 10 mph.

.SUNDAY...
Partly cloudy. Lows around 10. Highs in the lower 30s.
Winds generally less than 10 mph.

.MONDAY...
Mostly cloudy. Lows around 15. Highs in the mid 30s.
Winds generally less than 10 mph.

$$
Forecaster...Ross
Requested by...Dave Wilkins
Type of request...PRESCRIBED
.TAG 1718606.4/RIW
.EMAIL dawilkins@fs.fed.us



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