Special Weather Statement
Issued by NWS Riverton, WY

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WWUS85 KRIW 200841
SPSRIW

Special Weather Statement
National Weather Service Riverton WY
241 AM MDT Fri Oct 20 2017

WYZ022-210100-
Casper Mountain-
241 AM MDT Fri Oct 20 2017

...Strong winds with low relative humidity today...

Ahead of a Pacific low pressure trough, strong winds are expected
late this morning continuing through early this evening.
Southwest winds of 30 to 40 mph with gusts to 60 mph are expected.
Relative humidity is expected to drop to 25 to 30 percent in the
afternoon.

Outdoor burning is highly discouraged!

$$

WYZ016>018-210100-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Including the cities of Dubois, Riverton, Shoshoni, and Lander
241 AM MDT Fri Oct 20 2017

...Strong winds with low relative humidity today...

Ahead of a Pacific low pressure trough, strong winds are expected
late this morning continuing through early this evening.
Southwest winds of 20 to 30 mph with gusts to 40 mph are expected.
Relative humidity is expected to drop to 20 to 25 percent in the
afternoon.

Travel with light weight and high profile trailers may become
difficult. Outdoor burning is highly discouraged!

$$

WYZ003-210100-
Cody Foothills-
Including the cities of Cody and Meeteetse
241 AM MDT Fri Oct 20 2017

...Strong winds with low relative humidity today...

Ahead of a Pacific low pressure trough, strong winds are expected
late this morning continuing through early this evening.
Southwest winds of 25 to 35 mph with gusts to 45 mph are expected.
Local wind gusts to 55 mph may occur around Clark. Relative
humidity is expected to drop to 20 to 25 percent in the
afternoon.

Travel with light weight and high profile trailers may become
difficult. Outdoor burning is highly discouraged!

$$

WYZ010-011-210100-
Northeast Johnson County-Southeast Johnson County-
Including the cities of Buffalo and Kaycee
241 AM MDT Fri Oct 20 2017

...Gusty winds with low relative humidity today...

Ahead of a Pacific low pressure trough, gusty winds are expected
late this morning continuing through early this evening.
Southwest winds of 20 to 25 mph with gusts to 35 mph are expected.
Relative humidity is expected to drop to 17 to 23 percent in the
afternoon.

Outdoor burning is highly discouraged!

$$

WYZ028>030-210100-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
Including the cities of Rock Springs, Green River, and Wamsutter
241 AM MDT Fri Oct 20 2017

...Strong winds with low relative humidity today...

Ahead of a Pacific low pressure trough, strong winds are expected
late this morning continuing through this evening. Southwest
winds of 25 to 35 mph with gusts to 45 mph are expected. Local
wind gusts to 55 mph may occur from Bitter Creek to Wamsutter.
Relative humidity is expected to drop to 20 to 25 percent in the
afternoon.

Travel with light weight and high profile trailers may become
difficult. Outdoor burning is highly discouraged!

$$

WYZ001-012-013-210100-
Yellowstone National Park-Teton and Gros Ventre Mountains-
Jackson Hole-
Including the cities of Lake, Mammoth, Old Faithful, and Jackson
241 AM MDT Fri Oct 20 2017

...Snow with strong winds this afternoon and tonight...

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

$$

WYZ002-210100-
Absaroka Mountains-
241 AM MDT Fri Oct 20 2017

...Snow with strong winds this afternoon and tonight...

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

Snowfall of 1 to 3 inches is expected above 8500 feet with areas
of 3 to 5 inches above 9500 feet. The snow level will fall into
the valleys during the evening with 1 to 2 inches possible below
8500 feet.

The snow showers will be accompanied by strong west winds of 30
to 40 mph with gusts to 50 mph on the passes and higher ridges.

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

$$

WYZ015-210100-
Wind River Mountains East-
241 AM MDT Fri Oct 20 2017

...Snow with strong winds this afternoon and tonight...

A Pacific low pressure trough is expected to bring areas of
moderate snow showers to the mountains, developing late this
morning and becoming more widespread this afternoon and tonight.

Snowfall of 2 to 4 inches is expected above 8500 feet with areas
of 4 to 7 inches above 9500 feet. The snow level will fall into
the valleys during the evening with 1 to 2 inches possible below
8500 feet. The higher amounts will occur on the northern end of
the range.

The snow showers will be accompanied by strong west winds of 30
to 40 mph with gusts to 50 mph on the passes and higher ridges.

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

$$

WYZ014-025-026-210100-
Wind River Mountains West-Upper Green River Basin Foothills-
Upper Green River Basin-
Including the cities of Pinedale, La Barge, Big Piney, and Farson
241 AM MDT Fri Oct 20 2017

...Snow with strong winds this afternoon and tonight...

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

Snowfall of 2 to 4 inches is expected above 8500 feet with areas
of 4 to 7 inches above 9500 feet. The snow level will fall into
the valleys during the evening with up to 1 inch 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.

$$

WYZ023-024-027-210100-
Star Valley-Salt River and Wyoming Ranges-South Lincoln County-
Including the cities of Afton, Alpine, Star Valley Ranch, Thayne,
Kemmerer, and Cokeville
241 AM MDT Fri Oct 20 2017

...Snow with strong winds this afternoon and tonight...

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

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

The snow showers will be accompanied by strong west winds of 25
to 35 mph with gusts to 45 mph on the passes and higher ridges.

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

$$

WYZ007-210100-
Owl Creek and Bridger Mountains-
241 AM MDT Fri Oct 20 2017

...Strong winds with low relative humidity today...

Ahead of a Pacific low pressure trough, strong winds are expected
late this morning continuing through this evening. Southwest
winds of 25 to 35 mph with gusts to 45 mph are expected. Relative
humidity is expected to drop to 25 to 30 percent in the afternoon.

Travel with light weight and high profile trailers may become
difficult. Outdoor burning is highly discouraged!

$$

WYZ008-009-210100-
Bighorn Mountains West-Bighorn Mountains Southeast-
241 AM MDT Fri Oct 20 2017

...Strong winds with low relative humidity today...

Ahead of a Pacific low pressure trough, strong winds are expected
late this morning continuing through this evening. Southwest
winds of 25 to 35 mph with gusts to 45 mph are expected. Relative
humidity is expected to drop to 25 to 35 percent in the afternoon.

Travel with light weight and high profile trailers may become
difficult. Outdoor burning is highly discouraged!

$$

WYZ004>006-210100-
North Big Horn Basin-Southwest Big Horn Basin-
Southeast Big Horn Basin-
Including the cities of Thermopolis and Worland
241 AM MDT Fri Oct 20 2017

...Gusty winds with low relative humidity today...

Ahead of a Pacific low pressure trough, gusty winds are expected
late this morning continuing through this evening. Southwest
winds of 20 to 25 mph with gusts to 35 mph are expected. Relative
humidity is expected to drop to 20 to 25 percent in the afternoon.

Outdoor burning is highly discouraged!

$$



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