National Weather Service

Watches, Warnings & Advisories
NWS Homepage

2 products issued by NWS for: Yellowstone National Park WY
Share |

Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Riverton WY
219 AM MDT Thu Oct 19 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-
219 AM MDT Thu Oct 19 2017


This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and tonight.

Critical fire weather likely in Johnson and Natrona Counties.

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

Friday and Friday night...Some accumulating snowfall possible
mainly in the western mountains. Strong winds are likely in some
areas east of the Divide.

Saturday night and Sunday...Strong winds possible in the
Absaroka Mountains and Cody Foothills. Light to moderate snow
possible in the northwestern mountains.

Sunday night and Monday...Strong ridge top winds Sunday night.
Strong northwest winds possible Monday in the northern Bighorn
Basin and northeast Johnson County.


Spotter activation will not be needed today and tonight.


Special Weather Statement

Special Weather Statement
National Weather Service Riverton WY
219 PM MDT Thu Oct 19 2017

Yellowstone National Park-Teton and Gros Ventre Mountains-
Jackson Hole-
Including the cities of Lake, Mammoth, Old Faithful, and Jackson
219 PM MDT Thu Oct 19 2017

...Snow with strong winds Friday afternoon and night...

A Pacific low pressure trough is expected to bring areas of
moderate to heavy snow showers to the mountains developing
Friday morning and becoming more widespread Friday afternoon
and night.

Snowfall of 3 to 6 inches is expected above 8500 feet with areas
of 6 to 10 inches above 9500 feet. The snow level will fall into
the valleys during the evening with 1 to 3 inches possible below
8500 feet.

The snow showers will be accompanied by strong west winds of 20
to 30 mph with gusts to 40 mph on the passes and higher ridges.

Hunters, campers and climbers should be prepared for snow and
strong gusty winds.


U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
Page last modified: May 16, 2007
NATIONAL WEATHER SERVICE: for Safety, for Work, for Fun - FOR LIFE