Wind River Mountains West Severe Watches & Warnings NOAA Weather Radio

Watches & Warnings

Winter Weather Advisory
Issued: 1:07 PM MDT Sep. 21, 2017 – National Weather Service

... Winter Weather Advisory in effect from 9 PM this evening to
noon MDT Friday...

The National Weather Service in Riverton has issued a Winter
Weather Advisory for snow, which is in effect from 9 PM this
evening to noon MDT Friday.

* Timing... a period of significant snow is expected again later
this evening into Friday morning before decreasing into Friday
afternoon. The significant snowfall is only expected on the
north half of the range roughly north of a line from Pinedale to
Crowheart. Very little snow is expected further south and mainly
above 9,000 to 10,000 feet.

* Snowfall totals... 5 to 9 inches north half of the range with
very little or no snow over South Pass.

* Main impact... Togwotee Pass will become snow covered again.
Backcountry travellers and hunters should be prepared for a
round of heavy wet snow and snow covered roads, especially over
Union Pass.

Precautionary/preparedness actions...

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.





Special Statement
Issued: 1:17 AM MDT Sep. 21, 2017 – National Weather Service

... 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
very high... at or above 10000 feet through tonight... with only
slight chances for snow mixing with rain below this level. That
said, anywhere from a half an inch and two inches 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 10000 feet... with locally higher amounts possible.


117 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
very high... at or above 10000 feet through tonight... with only
slight chances for snow mixing with rain below this level. That
said, anywhere from a half an inch and two inches 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 10000 feet... with locally higher amounts possible.



Public Information Statement
Issued: 1:56 PM MDT Sep. 21, 2017 – National Weather Service


... Preliminary snowfall amounts in the western mountains since early
Thursday afternoon...

Location snowfall

Lincoln County...
blind bull Summit snotel... 5 inches.

Sublette County...
gunsite pass snotel... 4 inches.

Teton County...
grand targhee snotel... 15 inches.
Togwotee Pass snotel... 8 inches.
Togwotee Pass... 5 inches.
Phillips bench snotel... 2 inches.
Grassy Lake snotel... 2 inches.

Yellowstone National Park...
Two Ocean Plateau snotel... 12 inches.
Parker Peak snotel... 8 inches.


0156 PM MST Thu Sep 21 2017


... Preliminary snowfall amounts in the western mountains since early
Thursday afternoon...

Location snowfall

Lincoln County...
blind bull Summit snotel... 5 inches.

Sublette County...
gunsite pass snotel... 4 inches.

Teton County...
grand targhee snotel... 15 inches.
Togwotee Pass snotel... 8 inches.
Togwotee Pass... 5 inches.
Phillips bench snotel... 2 inches.
Grassy Lake snotel... 2 inches.

Yellowstone National Park...
Two Ocean Plateau snotel... 12 inches.
Parker Peak snotel... 8 inches.



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