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2 products issued by NWS for: Yellowstone National Park WY
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Hazardous Weather Outlook

Hazardous Weather Outlook...UPDATED
National Weather Service Riverton WY
635 AM MST Thu Dec 14 2017

WYZ001>020-022>030-151200-
Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Big Horn Basin-Southwest Big Horn Basin-
Southeast Big Horn Basin-Owl Creek and Bridger Mountains-
Bighorn Mountains West-Bighorn Mountains Southeast-
Northeast Johnson County-Southeast Johnson County-
Teton and Gros Ventre Mountains-Jackson Hole-
Wind River Mountains West-Wind River Mountains East-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Salt River and Wyoming Ranges-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
635 AM MST Thu Dec 14 2017

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and Tonight.

Strong north to northwest winds across portions of Johnson County
today. Patchy fog across basins and valleys with the most
widepsread fog occurring across the Upper Green River Basin this
morning.


.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Friday...Localized High winds possible over the northern Cody
Foothills.

Friday night through Saturday night...Snow is expected to impact
western Wyoming late Friday night spilling east of the Divide
Saturday morning. The snow is expected to taper off from north to
south Saturday night. This system has the potential to bring
significant snowfall to portions of the area. Currently the best
chance of heavy snowfall is across central Wyoming. Please stay
tuned for more details on this potential winter storm.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today or tonight.

$$




Special Weather Statement

Special Weather Statement
National Weather Service Riverton WY
316 PM MST Thu Dec 14 2017

WYZ001-151000-
Yellowstone National Park-
Including the cities of Lake, Mammoth, and Old Faithful
316 PM MST Thu Dec 14 2017

...Snow and colder temperatures for Yellowstone National Park
Friday night and Saturday...

Snow will spread east into Yellowstone National Park Friday
evening becoming widespread by late evening.  Snowfall is
expected to continue through Saturday with snow accumulations of
4 to 8 inches in the mountains and 2 to 4 inches in the valleys.

$$



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