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

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WWUS45 KRIW 171846
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
1246 PM MDT Wed May 17 2017

...LATE SEASON WINTER STORM TO IMPACT WESTERN, CENTRAL AND
NORTHERN WYOMING THROUGH THURSDAY NIGHT...

.A vigorous late season winter storm will begin to take shape
across the northern and central Rocky Mountain states this
afternoon. Copious amounts of moisture from the eastern Pacific
will combine with unseasonably cold temperatures to give
significant areas of snowfall across the western, northern and
central mountains of Wyoming.  Snow will lower into the lower
elevations tonight and fluctuate in elevation through Thursday
becoming mostly snow Thursday night.

WYZ022-180000-
/O.EXB.KRIW.WS.W.0016.170518T0600Z-170519T1200Z/
Casper Mountain-
1246 PM MDT Wed May 17 2017

...WINTER STORM WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 6 AM
MDT FRIDAY...

The National Weather Service in Riverton has issued a Winter
Storm Warning for heavy wet snow, which is in effect from
midnight tonight to 6 AM MDT Friday.

* TIMING...Periods of moderate to heavy snow will increase through
  the night...continuing through Thursday night.

* Snow Accumulation...15 to 25 inches.

* MAIN IMPACT...Slushy to snow packed roads will make travel
  difficult. Visibility could be reduced to under one quarter
  mile at times in heavy snow.

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.

&&

$$

WYZ019-180000-
/O.EXB.KRIW.WS.W.0016.170518T0600Z-170519T1200Z/
Green Mountains and Rattlesnake Range-
Including the city of Jeffrey City
1246 PM MDT Wed May 17 2017

...WINTER STORM WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 6 AM
MDT FRIDAY...

The National Weather Service in Riverton has issued a Winter
Storm Warning for heavy wet snow, which is in effect from
midnight tonight to 6 AM MDT Friday.

* TIMING...Periods of moderate to heavy snow will increase through
  the night...continuing through Thursday night.

* Snow Accumulation...5 to 10 inches across highway 287.

* MAIN IMPACT...Slushy to snow packed roads will make travel
  difficult on highway 287 from Beaver Rime to Muddy Gap.
  Visibility could be  reduced to under one quarter mile at times
  in heavy snow.

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.

&&

$$

WYZ015-180000-
/O.EXB.KRIW.WS.W.0016.170518T0600Z-170519T1200Z/
Wind River Mountains East-
1246 PM MDT Wed May 17 2017

...WINTER STORM WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 6 AM
MDT FRIDAY...

The National Weather Service in Riverton has issued a Winter
Storm Warning for heavy wet snow, which is in effect from
midnight tonight to 6 AM MDT Friday.

* TIMING...Periods of moderate to heavy snow will increase through
  the night...continuing through Thursday night.

* Snow Accumulation...15 to 25 inches from South Pass, highway 28,
  and Togwotee Pass, highway 26.

* MAIN IMPACT...Slushy to snow packed roads will make travel
  difficult on South pass and Togwotee pass. Visibility could be
  reduced to under one quarter mile at times in heavy snow.

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.

&&

$$

WYZ008-009-180000-
/O.CON.KRIW.WS.W.0016.000000T0000Z-170519T0000Z/
Bighorn Mountains West-Bighorn Mountains Southeast-
1246 PM MDT Wed May 17 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT
THURSDAY...

* TIMING...Periods of moderate to heavy snow will increase
  through the day today...continuing through the day Thursday.

* Snow Accumulation...15 to 25 inches across the northern Bighorn
  Mountains...6 to 12 over the southern portion of the mountains.

* MAIN IMPACT...Slushy to snow packed roads will make travel
  difficult on Powder River and especially Granite Mountain
  Passes. Visibility could be reduced to under one quarter mile
  at times in heavy snow.

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.

&&

$$

WYZ020-180000-
/O.EXB.KRIW.WW.Y.0027.170518T0600Z-170519T1200Z/
Natrona County Lower Elevations-
Including the city of Casper
1246 PM MDT Wed May 17 2017

...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO
6 AM MDT FRIDAY...

The National Weather Service in Riverton has issued a Winter
Weather Advisory for heavy wet snow, which is in effect from
midnight tonight to 6 AM MDT Friday.

* TIMING...Moderate to heavy snowfall will increase tonight
  and continue through Thursday night.

* TOTAL SNOW...3 to 6 inches, locally heavier near Casper
  Mountain.

* MAIN IMPACT...Highways may become slick, slushy and snow
  covered, including Interstate 25, and highways 26 and 220.
  Visibility could be reduced to under one quarter mile at times
  in heavy 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.

&&

$$

WYZ010-011-180000-
/O.EXB.KRIW.WW.Y.0027.170518T0600Z-170519T1200Z/
Northeast Johnson County-Southeast Johnson County-
Including the cities of Buffalo and Kaycee
1246 PM MDT Wed May 17 2017

...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO
6 AM MDT FRIDAY...

The National Weather Service in Riverton has issued a Winter
Weather Advisory for heavy wet snow, which is in effect from
midnight tonight to 6 AM MDT Friday.

* TIMING...Moderate to heavy snowfall will increase tonight and
  continue through Thursday night.

* TOTAL SNOW...3 to 6 inches, locally higher near the Bighorn
  mountains.

* MAIN IMPACT...Highways may become slick, slushy and snow
  covered, including Interstates 25 and 90. Visibility could be
  reduced to under one quarter mile at times in heavy 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.

&&

$$

WYZ017-018-180000-
/O.EXB.KRIW.WW.Y.0027.170518T0900Z-170519T1200Z/
Wind River Basin-Lander Foothills-
Including the cities of Riverton, Shoshoni, and Lander
1246 PM MDT Wed May 17 2017

...WINTER WEATHER ADVISORY IN EFFECT FROM 3 AM THURSDAY TO 6 AM
MDT FRIDAY...

The National Weather Service in Riverton has issued a Winter
Weather Advisory for heavy wet snow, which is in effect from 3 AM
Thursday to 6 AM MDT Friday.

* TIMING...Moderate to heavy snowfall will increase tonight
  continuing through Thursday night.

* TOTAL SNOW...3 to 6 inches, locally higher near Sinks Canyon and
  Red Canyon.

* MAIN IMPACT...Highways may become slick, slushy and snow
  covered, including Highways 789 and 287. Visibility could be
  reduced to under one quarter mile at times in heavy 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.

&&

$$

WYZ007-180000-
/O.EXB.KRIW.WW.Y.0027.170518T0900Z-170519T1200Z/
Owl Creek and Bridger Mountains-
1246 PM MDT Wed May 17 2017

...WINTER WEATHER ADVISORY IN EFFECT FROM 3 AM THURSDAY TO 6 AM
MDT FRIDAY...

The National Weather Service in Riverton has issued a Winter
Weather Advisory for heavy wet snow, which is in effect from 3 AM
Thursday to 6 AM MDT Friday.

* TIMING...Moderate to heavy snowfall will increase tonight and
  continue through Thursday night.

* TOTAL SNOW...6 to 10 inches.

* MAIN IMPACT...Wind River Canyon may become slick, slushy and
  snow covered. Visibility could be reduced to under one quarter
  mile at times in heavy 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.

&&

$$

WYZ030-180000-
/O.EXB.KRIW.WW.Y.0027.170518T0900Z-170519T1200Z/
East Sweetwater County-
Including the city of Wamsutter
1246 PM MDT Wed May 17 2017

...WINTER WEATHER ADVISORY IN EFFECT FROM 3 AM THURSDAY TO 6 AM
MDT FRIDAY...

The National Weather Service in Riverton has issued a Winter
Weather Advisory for heavy wet snow, which is in effect from 3 AM
Thursday to 6 AM MDT Friday.

* TIMING...Moderate to heavy snowfall will increase tonight and
  continue through Thursday night.

* TOTAL SNOW...3 to 6 inches.

* MAIN IMPACT...Interstate 80 and Highway 28 may become slick,
  slushy and snow covered.  Visibility could be reduced to under
  one quarter mile at times in heavy 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.

&&

$$

WYZ024-180000-
/O.CON.KRIW.WW.Y.0027.000000T0000Z-170518T0000Z/
Salt River and Wyoming Ranges-
1246 PM MDT Wed May 17 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...

* TIMING...Moderate to occasionally heavy snowfall will continue
  across much of the Salt and Wyoming Mountains continuing
  through the rest of today.

* TOTAL SNOW...4 to 12 inches.

* MAIN IMPACT...Highways may become slick, slushy and snow
  covered, including the Salt River Pass. Visibility could be
  reduced to under one quarter mile at times in heavy 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.

&&

$$

WYZ012-180000-
/O.CON.KRIW.WW.Y.0027.000000T0000Z-170518T0000Z/
Teton and Gros Ventre Mountains-
1246 PM MDT Wed May 17 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...

* TIMING...Moderate to occasionally heavy snowfall will increase
  across much of the Teton and Gros Ventre Mountains continuing
  through the rest of today.

* TOTAL SNOW...5 to 12 inches in the mountains...with locally
  heavier amounts in the Tetons.

* MAIN IMPACT...Highways may become slick, slushy and snow
  covered, including Teton Highway. Visibility could be reduced
  to under one quarter mile at times in heavy 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.

&&

$$

WYZ001-180000-
/O.CON.KRIW.WW.Y.0027.000000T0000Z-170518T1200Z/
Yellowstone National Park-
Including the cities of Lake, Mammoth, and Old Faithful
1246 PM MDT Wed May 17 2017

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

* TIMING...Moderate to occasionally heavy snowfall will increase
  across much of Yellowstone area above 6500 feet continuing
  through tonight.

* TOTAL SNOW...5 to 12 inches in the mountains...heaviest across
  the southern mountains in the Park.

* MAIN IMPACT...Highways may become slick, slushy and snow
  covered. Visibility could be reduced to under one quarter mile
  at times in heavy 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.

&&

$$

WYZ002-180000-
/O.CON.KRIW.WW.Y.0027.000000T0000Z-170518T1800Z/
Absaroka Mountains-
1246 PM MDT Wed May 17 2017

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

* TIMING...Moderate to heavy snowfall will increase across much of
  the Absaroka Mountains continuing through Thursday morning.


* TOTAL SNOW...6 to 18 inches in the mountains...heaviest
  snowfall expected across the far northern Absarokas.

* MAIN IMPACT...Highways may become slick, slushy and snow
  covered, including Chief Joseph Highway. Visibility could be
  reduced to under one quarter mile at times in heavy 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.

&&

$$



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