Fremont County, Idaho
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The National Weather Service's Watches, Warnings and Advisories by state counties include: Thunderstorm, Tornado, Flood, Flash Flood, Winter Storm, High Wind, Gale, Small Aircraft, High Surf, Marine, Heat, Air Quality, Ashfall, Hazardous, and Special Statements.
Weather Alerts: Fremont County, Idaho
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Winter Weather Advisory
Sawtooth Mountains-Upper Snake Highlands-
Big and Little Wood River Region-Lost River/Pahsimeroi-
Including the cities of Stanley, Clayton, St. Anthony, Ashton,
Island Park, Driggs, Victor, Hailey, Ketchum, Bellevue, Arco,
Challis, and Mackay
325 AM MDT Thu Sep 21 2017


The National Weather Service in Pocatello has issued a Winter
Weather Advisory for snow, which is in effect from 3 PM this
afternoon to 6 PM MDT Friday.

* IMPACTS...Travel is expected to be hazardous in the back country
and through mountain passes. Now is the time to prepare your
emergency supply travel kit.

* TIMING...Starting this afternoon with the heaviest snowfall
during the evening and overnight hours.

* SNOW ACCUMULATIONS...3 to 8 inches with accumulations of 7 to 11
inches above 8500 ft.

* CONFIDENCE...Moderate to High in snow impacts and initial
snowfall timing; Moderate regarding the timing of when the snow
will end.

* LOCATIONS...Above 6500 ft of the Upper Snake Highlands,
including Monida Pass. Above 6500 ft in the Sawtooth Mountains,
Big and Little Wood River Region, Lost River/Pahsimeroi
including Galena Summit and Willow Creek Summit with heaviest
snow falling above 8500 ft.

A winter weather advisory for snow means that periods of snow
will cause primarily travel difficulties. Be prepared for snow
covered roads and limited visibilities, and use caution while


Special Weather Statement
Yellowstone National Park-Absaroka Mountains-
Teton and Gros Ventre Mountains-Wind River Mountains West-
Wind River Mountains East-Salt River and Wyoming Ranges-
Including the cities of Lake, Mammoth, and Old Faithful
138 AM MDT Thu Sep 21 2017

...Cool and very wet Pacific storm system headed into western
Wyoming today...

The strong Pacific storm headed towards western Wyoming will
continue to bring copious amounts of precipitation with it.
However, temperatures with this Pacific air mass will be much
warmer than originally thought, keeping snow accumulation levels or above 9500 feet through tonight...with snow mixing
with rain below this level down to about 8500 feet. High mountain
passes such as Teton and Togwotee Passes will experience periods
of wet mountain snow this morning that could cause slushy
conditions on the roadways and slowing travel times. Otherwise,
anywhere from a half an inch and an inch and a half of liquid
precipitation can be expected to fall between now and Friday
morning across the western mountains and valleys. Heaviest
accumulating snow over the same time frame will range from 3 to 8
inches above 9500 feet...with locally higher amounts possible.

Winter Weather Advisory
Yellowstone National Park-
Including the cities of Lake, Mammoth, and Old Faithful
747 AM MDT Thu Sep 21 2017


* TIMING...Periods of snow will impact the higher elevations of
Yellowstone National Park through the day Friday. Snow levels
will vary between 7500 and 9000 feet.

* SNOWFALL TOTALS...6 to 12 inches above 10000 feet, 4 to 8
inches over Dunraven, and Sylvan mountain passes. 2 to 4
inches at Canyon. No snowfall is expected in Mammoth.

* MAIN IMPACT...Mountain passes in Yellowstone will be slick and
hazardous at times.


A winter weather advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
and slick roads with limited visibilities. Slow down, and allow
extra time to reach your destination. Check the latest road
conditions before venturing out.



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