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

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071
WWUS45 KRIW 280345
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
945 PM MDT Thu Apr 27 2017

...Spring snowstorm taking shape east of the continental divide
through Friday...

.A cold spring storm will impact mainly the central and eastern
part of the Cowboy State through Friday night with significant
snowfall in some locations. Any rain will change to snow tonight.
Then snow is gradually expected to taper off from north to south
Friday afternoon into Friday night.

WYZ019-281145-
/O.UPG.KRIW.WW.Y.0026.000000T0000Z-170429T0600Z/
/O.EXB.KRIW.WS.W.0015.170428T0400Z-170429T0600Z/
Green Mountains and Rattlesnake Range-
Including the city of Jeffrey City
945 PM MDT Thu Apr 27 2017

...WINTER STORM WARNING IN EFFECT UNTIL MIDNIGHT MDT FRIDAY
NIGHT...

The National Weather Service in Riverton has issued a Winter
Storm Warning for snow, which is in effect until midnight MDT
Friday night. The Winter Weather Advisory is no longer in effect.

* TIMING...Occasional snow through Friday evening. Moderate to
  heavy snow will occur.

* Snow Accumulation...6 to 12 inches.

* MAIN IMPACT...Slushy to snow packed roads will occur on highway
  789 from southeast of Lander to Muddy Gap through Friday
  morning.


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.

&&

$$

WYZ009-281145-
/O.CON.KRIW.WS.W.0015.000000T0000Z-170429T0600Z/
Bighorn Mountains Southeast-
945 PM MDT Thu Apr 27 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
FRIDAY NIGHT...

* TIMING...Periods of snow will occur through Friday evening.
  Expect moderate to heavy snow at times.

* SNOW ACCUMULATION...12 to 18 inches.

* MAIN IMPACT...Slushy to snow packed roads will make travel
  difficult on Powder River and Granite Passes.

* OTHER IMPACTS...Heavy snow will reduce visibility below a
  quarter mile at times.

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.

&&

$$

WYZ010-011-281145-
/O.CON.KRIW.WS.W.0015.000000T0000Z-170429T0600Z/
Northeast Johnson County-Southeast Johnson County-
Including the cities of Buffalo and Kaycee
945 PM MDT Thu Apr 27 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
FRIDAY NIGHT...

* TIMING...Periods of snow through Friday evening. Snow will be
  moderate to heavy at times.

* SNOW ACCUMULATION...6 to 10 inches, locally higher amounts in
  the foothills of the Bighorn mountains.

* MAIN IMPACT...Roads are expected to become slushy to snow
  covered tonight. Travel could become difficult at times
  especially late tonight and Friday morning.

* OTHER IMPACTS...Heavy snow will reduce visibility below a
  quarter mile at times.

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.

&&

$$

WYZ020-281145-
/O.CON.KRIW.WS.W.0015.000000T0000Z-170429T0600Z/
Natrona County Lower Elevations-
Including the city of Casper
945 PM MDT Thu Apr 27 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
FRIDAY NIGHT...

* TIMING...A mix of rain and snow will change to all snow by
  midnight. Then periods of snow will continue into Friday
  evening.

* SNOW ACCUMULATION...5 to 10 inches, with the highest amounts
  in northern and western Natrona County with lesser amounts
  toward Casper.

* MAIN IMPACT...Roads will likely become slushy to snow covered
  later tonight, and remain slick at times through Friday night.
  The worst driving conditions should occur Friday morning, with
  some improvement in road conditions by midday Friday.

* OTHER IMPACTS...Heavy snow will reduce visibility below a
  quarter mile at times.

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.

&&

$$

WYZ015-281145-
/O.CON.KRIW.WS.W.0015.000000T0000Z-170429T0600Z/
Wind River Mountains East-
945 PM MDT Thu Apr 27 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
FRIDAY NIGHT...

* TIMING...Periods of snow through Friday evening. Expect
  moderate to heavy snow at times.

* Snow Accumulation...8 to 15 inches.

* MAIN IMPACT...Slushy to snow packed roads will make travel
  difficult, including over South Pass.

* OTHER IMPACTS...Heavy snow will reduce visibility below a
  quarter mile at times.

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.

&&

$$

WYZ001-002-281145-
/O.CON.KRIW.WW.Y.0026.000000T0000Z-170428T1200Z/
Yellowstone National Park-Absaroka Mountains-
Including the cities of Lake, Mammoth, and Old Faithful
945 PM MDT Thu Apr 27 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MDT
FRIDAY...

* TIMING...Snow showers will gradually end overnight in
  Yellowstone National Park. Snow will continue in the Absarokas
  into Friday morning.

* TOTAL SNOW...6 to 12 inches in the mountains. New snow at the
  lower elevations of Yellowstone Park will be 2 inches or less
  overnight...with up to 4 inches near the East Entrance.

* MAIN IMPACT...Highways will become slick and snow covered,
  including Chief Joseph Highway and Highways 14/16/20 west out
  of Cody. Visibility could be reduced to under one quarter mile
  at times.

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.

&&

$$

WYZ003-004-281145-
/O.CON.KRIW.WW.Y.0026.000000T0000Z-170428T1800Z/
Cody Foothills-North Big Horn Basin-
Including the cities of Cody and Meeteetse
945 PM MDT Thu Apr 27 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT
FRIDAY...

* TIMING...Rain and snow in the Cody Foothills will become all
  snow by midnight. The northern Big Horn Basin will see rain at
  times tonight...changing to snow toward Friday morning. Snow
  will be locally heavy along the foothills.

* TOTAL SNOW...3 to 6 inches with locally higher amounts in the
  Cody Foothills. 1 to 3 inches in the Greybull to Lovell
  corridor.

* MAIN IMPACT...Highways will be mainly wet, but will be slick
  later tonight. The worst driving conditions are expected in
  the Cody Foothills, including the highway west of Cody, as
  well as Highway 120, tonight and Friday morning.

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.

&&

$$

WYZ005>007-281145-
/O.CON.KRIW.WW.Y.0026.000000T0000Z-170429T0600Z/
Southwest Big Horn Basin-Southeast Big Horn Basin-
Owl Creek and Bridger Mountains-
Including the cities of Thermopolis and Worland
945 PM MDT Thu Apr 27 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT
FRIDAY NIGHT...

* TIMING...Occasional rain will occur through midnight. Rain
  will change to snow after midnight. Snow will continue in the
  mountain locations through Friday evening.

* TOTAL SNOW...3 to 6 inches in the lower elevations of Hot
  Springs County with 6 to 12 inches in the Owl and Bridger
  mountains. Snowfall of 1 to 4 inches in Washakie County with
  the heaviest in Nowood Valley.

* MAIN IMPACT...Highways will be mainly wet, but will become
  slick in places later tonight and Friday morning. The worst
  driving conditions are expected along highway 120 northwest of
  Thermopolis and the highway from Ten Sleep to Big Trails.

* OTHER IMPACTS...Additional rock or mudslides could occur in
  the Wind River Canyon due to the rain and snow.

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.

&&

$$

WYZ022-281145-
/O.CON.KRIW.WW.Y.0026.000000T0000Z-170429T0600Z/
Casper Mountain-
945 PM MDT Thu Apr 27 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT
FRIDAY NIGHT...

* TIMING...Occasional snow through Friday evening. Snow will be
  moderate to heavy at times.

* Snow Accumulation...4 inches have fallen on Casper Mountain.
  Expect a total snowfall of 6 to 12 inches.

* MAIN IMPACT...Slushy to snow packed roads will make travel
  difficult.

* OTHER IMPACTS...Heavy snow will reduce visibility below a
  quarter mile at times.

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.

&&

$$

WYZ017-018-281145-
/O.CON.KRIW.WW.Y.0026.000000T0000Z-170429T0600Z/
Wind River Basin-Lander Foothills-
Including the cities of Riverton, Shoshoni, and Lander
945 PM MDT Thu Apr 27 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT
FRIDAY NIGHT...

* TIMING...A mix of rain and snow will change to all snow
  tonight and continue into Friday evening.

* Snow Accumulation...3 to 6 inches. However, locally heavier
  amounts in more persistent snow bands are possible.

* MAIN IMPACT...Roads may become slushy to snow covered
  especially where heavier snow persists.

* OTHER IMPACTS...Additional rock or mudslides could occur in
  the Wind River Canyon.

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.

&&

$$

WYZ008-281145-
/O.CON.KRIW.WW.Y.0026.000000T0000Z-170429T0600Z/
Bighorn Mountains West-
945 PM MDT Thu Apr 27 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT
FRIDAY NIGHT...

* TIMING...Periods of snow will occur through Friday evening.

* Snow Accumulation...6 to 12 inches.

* MAIN IMPACT...Slushy to snow packed roads will make travel
  difficult on Powder River and Granite Mountain Passes.

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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