Winter Weather Warnings / Watches / Advisories
Issued by NWS Riverton, WY

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870
WWUS45 KRIW 200507
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
1107 PM MDT Wed Apr 19 2017

...Another significant snowfall event slated for much of the
Northern and Central Mountains for Thursday night through Friday
night...

.The combination of a strong upper Pacific trough modest lee side
cyclogenesis will produce significant amounts of snowfall over
portions of the Absaroka, Wind River, and Big Horn Mountains from
Thursday night through Friday night.

WYZ014-200615-
/O.CAN.KRIW.WS.A.0016.170421T0000Z-170422T0600Z/
Wind River Mountains West-
1107 PM MDT Wed Apr 19 2017

...WINTER STORM WATCH IS CANCELLED...

The National Weather Service in Riverton has cancelled the Winter
Storm Watch.

Heaviest snowfall with this weather system will occur across the
eastern Wind River Mountains...with lesser amounts over the Western
Wind River Mountains. Therefore the Winter Storm Watch has been
cancelled for the western Wind River Mountains.

$$

WYZ008-009-201000-
/O.UPG.KRIW.WS.A.0016.170421T0600Z-170422T1200Z/
/O.NEW.KRIW.WS.W.0013.170421T0600Z-170422T1200Z/
Bighorn Mountains West-Bighorn Mountains Southeast-
1107 PM MDT Wed Apr 19 2017

...WINTER STORM WARNING IN EFFECT FROM MIDNIGHT THURSDAY NIGHT TO
6 AM MDT SATURDAY...

The National Weather Service in Riverton has issued a Winter
Storm Warning for Heavy Snow, which is in effect from midnight
Thursday night to 6 AM MDT Saturday. The Winter Storm Watch is no
longer in effect.

* TIMING...Snow showers will generally begin after midnight
  Thursday night with the snow levels starting out above 8500
  feet. After midnight Thursday night, the snow levels should
  lower to around 7500 feet by sun up then down to 6500 feet
  through Friday morning. Heaviest snowfall expected between
  midnight Thursday and midnight Friday.

* TOTAL SNOW ACCUMULATION...4 to 8 inches between 6500 feet and
  7500 feet...8 to 14 inches from 7500 feet to 9000 feet...and 14
  to 18 inches above 9000 feet.

* MAIN IMPACT...Highways may become slick and snow packed
  including Highway 16 over Powder River Pass and Highway 14
  over Granite Pass. Visibility may lower to around 1/4 of a
  mile in heavier snowfall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A winter storm warning means significant amounts of snow, and or
blowing snow are expected or occurring. This could make travel
very hazardous or impossible. If you must travel keep some food,
water, and an extra flashlight in your vehicle in case of an
emergency. Check the latest road conditions at wyoroad.info or by
dialing 5 1 1.

&&

$$

WYZ015-201000-
/O.UPG.KRIW.WS.A.0016.170421T0000Z-170422T0600Z/
/O.NEW.KRIW.WW.Y.0024.170421T0000Z-170422T0600Z/
Wind River Mountains East-
1107 PM MDT Wed Apr 19 2017

...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THURSDAY TO
MIDNIGHT MDT FRIDAY NIGHT...

The National Weather Service in Riverton has issued a Winter
Weather Advisory for snow, which is in effect from 6 PM Thursday
to midnight MDT Friday night. The Winter Storm Watch is no longer
in effect.

* TIMING...Snow showers will begin late Thursday afternoon with
  the snow levels starting out above 8500 feet. After midnight
  Thursday, the snow levels will lower to around 7500 feet, then down
  to 6500 feet through Friday morning.

* TOTAL SNOW ACCUMULATION...6 to 12 inches possible with locally
  higher amounts.

* MAIN IMPACT...Highways may become slick and snow packed,
  including South Pass and Togwotee Pass. Visibility may lower
  to around 1/4 of a mile in heavier snowfall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A winter weather advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
and slick roads with limited visibilities. Slow down, and allow
extra time to reach your destination. Check the latest road
conditions at wyoroad.info or by dialing 5 1 1.

&&

$$

WYZ002-201000-
/O.UPG.KRIW.WS.A.0016.170421T0000Z-170422T0600Z/
/O.NEW.KRIW.WW.Y.0024.170421T0000Z-170422T0600Z/
Absaroka Mountains-
1107 PM MDT Wed Apr 19 2017

...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THURSDAY TO
MIDNIGHT MDT FRIDAY NIGHT...

The National Weather Service in Riverton has issued a Winter
Weather Advisory for snow, which is in effect from 6 PM Thursday
to midnight MDT Friday night. The Winter Storm Watch is no longer
in effect.

* TIMING...Snow showers will begin by Thursday evening with the
snow levels starting out above 9000 feet. After midnight
Thursday, the snow levels will lower to around 7000 fee...then
on down to 5500 feet through Friday morning.

* TOTAL SNOW ACCUMULATION...6 to 12 inches with local amounts up
to 16 inches possible.

* MAIN IMPACT...Highways may become slick and snow packed
  including Highway 14 16 20 west out of Cody as well as the
  Chief Joseph Highway or Highway 296. Visibility may lower to
  around 1/4 of a mile in heavier snowfall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A winter weather advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
and slick roads with limited visibilities. Slow down, and allow
extra time to reach your destination. Check the latest road
conditions at wyoroad.info or by dialing 5 1 1.

&&

$$

WYZ003-201000-
/O.NEW.KRIW.WW.Y.0024.170421T0300Z-170422T0600Z/
Cody Foothills-
Including the cities of Cody and Meeteetse
1107 PM MDT Wed Apr 19 2017

...WINTER WEATHER ADVISORY IN EFFECT FROM 9 PM THURSDAY TO
MIDNIGHT MDT FRIDAY NIGHT...

The National Weather Service in Riverton has issued a Winter
Weather Advisory for snow, which is in effect from 9 PM Thursday
to midnight MDT Friday night.

* TIMING...Snow showers will begin after 3 am...becoming heavy by
  around sun up.

* TOTAL SNOW ACCUMULATION...2 to 6 inches with local amounts up
  to 8 inches possible.

* MAIN IMPACT...Area highways may become slushy or snow packed
  including Highways 14 16 and 20 west out of Cody. Visibility may
  lower to around 1/2 of a mile in heavier snowfall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A winter weather advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
and slick roads with limited visibilities. Slow down, and allow
extra time to reach your destination. Check the latest road
conditions at wyoroad.info or by dialing 5 1 1.

&&

$$



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