Hazardous Weather Outlook
Issued by NWS Riverton, WY

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FLUS45 KRIW 222049

Hazardous Weather Outlook
National Weather Service Riverton WY
149 PM MST Wed Feb 22 2017

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-
149 PM MST Wed Feb 22 2017

...Flood Warning remains in effect for the Big Horn River roughly
between Manderson and Greybull into Thursday...

...Blizzard Warnings for South Pass...Green Mountains and
Rattlesnake Range area and Eastern Sweetwater County including
Interstate 80 developing tonight and continuing into Friday

...Winter Storm Warnings across much of the central and southern
Wyoming late tonight through Friday morning...

...Winter Weather Advisories for the Big Horn Mountains...Cody
Foothills and Hot Springs County Thursday through Friday

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and Tonight

Ice jam flooding continues across portions of the Big Horn Basin
especially along the Big Horn River in Big Horn County.

A significant winter storm will develop tonight over southern
portions, bringing moderate to heavy snow across eastern, central
and southern portions of the forecast area. Please see the
highlights for further details.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Thursday and Friday...Significant snow will fall during the day
Thursday across Johnson, Natrona, Fremont and Sweetwater counties,
before subsiding by mid day Friday. The heaviest snow is expected
across Natrona...Fremont and Eastern Sweetwater Counties. Gusty
north to northeast winds will develop Thursday morning, from
Buffalo to Casper to South Pass to Rock Springs, causing areas of
blowing and drifting snow and blizzard conditions in some areas.
Winds will gradually subside Thursday night. Light to moderate
snow will also return across the far western mountains.

Sunday night through Monday night...Significant snow possible
across western valleys and mountains.


Spotters are encouraged to report any river or creek flooding, as
well as snowfall amounts. Thank you!


Team Riverton

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