Special Weather Statement
Issued by NWS Riverton, WY

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WWUS85 KRIW 210341
SPSRIW

Special Weather Statement
National Weather Service Riverton WY
941 PM MDT Wed Sep 20 2017

WYZ001-002-012-014-015-024-210800-
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
941 PM MDT Wed Sep 20 2017

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

The strong Pacific storm headed towards western Wyoming will
still 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 Thursday night...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 tonight and
Friday morning across the western mountains and valleys. Heaviest
accumulating snow over the same time frame will range from 4 to 8
inches above 10000 feet...with locally higher amounts possible.

$$
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