Special Weather Statement
Issued by NWS Riverton, WY

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WWUS85 KRIW 202012
SPSRIW

Special Weather Statement
National Weather Service Riverton WY
212 PM MDT Thu Apr 20 2017

...A spring weather system will bring accumulating snowfall,
mainly to the high country of Western and Central Wyoming tonight
through Friday night...

WYZ001-012-014-024-211000-
Yellowstone National Park-Teton and Gros Ventre Mountains-
Wind River Mountains West-Salt River and Wyoming Ranges-
Including the cities of Lake, Mammoth, and Old Faithful
212 PM MDT Thu Apr 20 2017

This afternoon, another upper level disturbance and associated
surface front will move into western Wyoming with increasing
chances for precipitation. Snow levels will begin above 8500 feet
this afternoon...falling to near valley floors by sun up Friday
morning. One to two inches of snowfall will be possible above 9500
feet this afternoon with another 3 to 6...localized 9...inches
above 7500 feet through the day Friday. Higher roads and passes
will experience areas of slush or become snow packed in spots.

$$

WYZ016-211000-
Upper Wind River Basin-
Including the city of Dubois
212 PM MDT Thu Apr 20 2017

A slow moving low pressure system drifting northeast across
Central Wyoming, combined with cold frontal passage, will result
in a likelihood of snowfall tonight through Friday night. Expect a
snow total of 2 to 4 inches with some melting expected Friday
afternoon. Most of the snowfall will fall tonight and Friday
morning. Area highways may become snow covered or slushy,
especially tonight, Friday morning, and Friday evening.

$$

WYZ018-211000-
Lander Foothills-
Including the city of Lander
212 PM MDT Thu Apr 20 2017

| slow moving low pressure system drifting northeast across
Central Wyoming, combined with cold frontal passage, will result
in a likelihood of snowfall Friday and Friday night. Rain will
begin around 8 pm this evening before changing over to snow by 7
am Friday morning. Expect a snow total of 1 to 3 inches with some
melting expected Friday afternoon. Most of the snow will fall in
the foothills above Lander. Area highways may become snow covered
or slushy, especially tonight, Friday morning, and Friday night.


$$

WYZ019-211000-
Green Mountains and Rattlesnake Range-
Including the city of Jeffrey City
212 PM MDT Thu Apr 20 2017

A slow moving low pressure system drifting northeast across
Central Wyoming, combined with cold frontal passage, will result
in a likelihood of snowfall late tonight through Friday night.
Expect a snow total of 2 to 5 inches with locally higher amounts
over the higher terrain. Area highways may become snow covered or
slushy, especially Friday morning, and Friday night.

$$

WYZ005-211000-
Southwest Big Horn Basin-
Including the city of Thermopolis
212 PM MDT Thu Apr 20 2017

A slow moving low pressure system drifting northeast across
Central Wyoming, combined with cold frontal passage, will result
in a likelihood of snowfall Friday and Friday night. Rain will
begin around 10 pm this evening before changing over to snow by 10
am Friday morning. Expect a snow total of 1 to 3 inches with some
melting expected Friday afternoon. Most of the snow will fall
closer to the foothills surrounding Thermopolis. Area highways may
become snow covered or slushy, especially Friday morning, and
Friday evening.


$$

WYZ017-211000-
Wind River Basin-
Including the cities of Riverton and Shoshoni
212 PM MDT Thu Apr 20 2017

A slow moving low pressure system drifting northeast across
Central Wyoming, combined with cold frontal passage, will result
in a likelihood of snowfall Friday and Friday night. Rain will
begin around 9 pm this evening before changing over to snow by 7
am Friday morning. Expect a snow total of 1 to 2 inches with local
amounts of 3 inches over the higher hills. Some melting expected
Friday afternoon. Area highways may become snow covered or slushy,
especially Friday morning and Friday night.


$$

WYZ022-211000-
Casper Mountain-
212 PM MDT Thu Apr 20 2017

A slow moving low pressure system drifting northeast across
Central Wyoming, combined with cold frontal passage, will result
in a likelihood of snowfall Friday and Friday night. Rain will
begin around 11 pm this evening before changing over to snow by
Friday morning. Expect a snow total of 3 to 5 inches with locally
higher amounts over the highest elevations. Area highways may
become snow covered or slushy, especially Friday morning and
Friday night.

$$



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