Suppression Forecast
Issued by NWS Riverton, WY

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FNUS75 KRIW 222149
FWSRIW

Spot Forecast for Marie Island SAR...Grand Teton National Park
National Weather Service Riverton WY
349 PM MDT Tue May 22 2018

Forecast is based on incident time of 1600 MDT on May 22.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...
A chance of thunderstorms will continue into the evening before
another bout of widespread showers and a few thunderstorms are
expected later tonight, continuing at times through Wednesday.
There is a little break in the storms at this time but it`s hard
to tell if that will hold for a couple hours. Overall, it will
be an unsettled period through tomorrow with waves of showers
and a few thunderstorms with the heavier storms producing one
quarter to one half inch hail, gusty wind to 40 mph and very
heavy rain.

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

FORECASTER...Skrbac

.REST OF TODAY...

Sky/weather.........Mostly cloudy (75-85 percent). Chance of
                    showers and thunderstorms.
Max temperature.....57-60.
Min humidity........50-55 percent.
20-foot winds.......South to southeast 10 to 20 mph. Gusty and erratic
                    winds expected near thunderstorms.
Ridge top winds.....South 15 to 20 mph.
LAL.................3.
Chc of wetting rain.20 percent.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.
Mixing height.......5000-6000 ft AGL.
Transport winds.....Southeast 15 mph.

.TONIGHT...

Sky/weather.........Cloudy (80-90 percent). Chance of rain showers
                    and slight chance of thunderstorms in the
                    evening, then rain showers likely and slight
                    chance of thunderstorms after midnight. Patchy
                    fog early in the morning.
Min temperature.....39-42.
Max humidity........92-95 percent.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusty and erratic
                    winds expected near thunderstorms early in the
                    evening. Gusty and erratic winds expected near
                    thunderstorms in the late evening and early
                    morning.
Ridge top winds.....Southeast around 15 mph shifting to the
                    south or southwest by morning.
LAL.................2 until 0300, then 1.
Chc of wetting rain.60 percent.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.
Mixing height.......Decreasing to 500 ft AGL after midnight.
Transport winds.....Southeast 9 to 13 mph.

.WEDNESDAY...

Sky/weather.........Cloudy (80-90 percent). Patchy fog early in the
                    morning. Rain showers likely through the day.
                    Slight chance of thunderstorms in the
                    afternoon.
Max temperature.....52-55.
Min humidity........69-72 percent.
20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 15 mph.
                    Gusty and erratic winds expected near
                    thunderstorms in the afternoon.
Ridge top winds.....South to southwest 15 to 20 mph.
LAL.................1 until 1200, then 2.
Chc of wetting rain.70 percent.
Haines Index........2 or very low potential for large plume
                    dominated fire growth.
Mixing height.......2400-3400 ft AGL.
Transport winds.....Southwest 10 to 16 mph.

.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY NIGHT...
Mostly cloudy. Chance of showers and slight chance of
thunderstorms in the evening, then chance of showers after
midnight. Lows around 40. Winds generally less than 10 mph.
.THURSDAY...
Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows around 40. Highs in the lower 60s. Winds
generally less than 10 mph.
.FRIDAY...
Partly cloudy. Lows in the upper 30s. Highs in the upper 60s.
Winds generally less than 10 mph.
.SATURDAY...
Partly cloudy with chance of showers and slight chance of
thunderstorms. Lows in the upper 30s. Highs in the mid 60s. Winds
generally less than 10 mph.

$$
Forecaster...Skrbac
Requested by...Jared Sorensen
Type of request...SAR
.TAG 1810499.0/RIW
.EMAIL grte_dispatch@nps.gov



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