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

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WWUS45 KRIW 201015
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
315 AM MST Mon Feb 20 2017

...A strong Pacific storm will bring heavy snow to the western
mountains from this Afternoon through Tuesday night...

.A strong Pacific storm will bring heavy snow to the western
mountains from Monday afternoon through Tuesday evening. Also,
strong west to southwest winds will cause significant blowing and
drifting snow. The western valleys will see a mix of rain and
snow.

WYZ001-210000-
/O.UPG.KRIW.WS.A.0011.170221T0000Z-170222T0700Z/
/O.NEW.KRIW.WS.W.0008.170220T1900Z-170222T1200Z/
Yellowstone National Park-
Including the cities of Lake, Mammoth, and Old Faithful
315 AM MST Mon Feb 20 2017

...Winter Storm Warning in effect from noon today to 5 am MST
Wednesday...

The National Weather Service in Riverton has issued a Winter
Storm Warning for snow and blowing snow, which is in effect from
noon today to 5 AM MST Wednesday. The Winter Storm Watch is no
longer in effect.

* Timing...Snow and strong winds are expected to move over the
  Yellowstone National Park Monday afternoon and continue through
  Tuesday night.

* Snowfall accumulation...3 to 6 inches in the Mammoth and Tower
  Junction areas. Otherwise 12 to 24 inches of snow are expected,
  with localized amounts up to 30 inches over southwest portion of
  the park.

* Wind and Visibility...West to southwest winds of 20 to 30 mph
  with gusts to 45 mph. Visibility frequently below a quarter mile
  in heavy snow and blowing snow.

* Main Impact...The severely reduced visibility in snow and
  blowing snow can be very disorientating at time for those
  recreating across Yellowstone.

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.

&&

$$

WYZ002-210000-
/O.UPG.KRIW.WS.A.0011.170221T0000Z-170222T0700Z/
/O.NEW.KRIW.WS.W.0008.170220T1900Z-170222T1200Z/
Absaroka Mountains-
315 AM MST Mon Feb 20 2017

...Winter Storm Warning in effect from noon today to 5 am MST
Wednesday...

The National Weather Service in Riverton has issued a Winter
Storm Warning for snow and blowing snow, which is in effect from
noon today to 5 AM MST Wednesday. The Winter Storm Watch is no
longer in effect.

* Timing...Snow and strong winds are expected to develop this
  afternoon, and remain through Tuesday Night.

* Snowfall accumulation...Snowfall of 10 to 20 inches is expected.

* Wind and Visibility...West to southwest winds of 25 to 35 mph
  with gusts to 60 mph especially on mountain passes and upper
  ridges. Visibility will be near zero at times in heavy snow and
  blowing snow.

* Main Impact...Travel may become very difficult with the wind and
  snow producing slick, snow-packed roads and high drifts.

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.

&&

$$

WYZ012-024-210000-
/O.UPG.KRIW.WS.A.0011.170221T0000Z-170222T0700Z/
/O.NEW.KRIW.WS.W.0008.170220T1900Z-170222T1200Z/
Teton and Gros Ventre Mountains-Salt River and Wyoming Ranges-
315 AM MST Mon Feb 20 2017

...Winter Storm Warning in effect from noon today to 5 am MST
Wednesday...

The National Weather Service in Riverton has issued a Winter
Storm Warning for snow and blowing snow, which is in effect from
noon today to 5 AM MST Wednesday. The Winter Storm Watch is no
longer in effect.

* Timing...Snow and strong winds are expected to move into the
  western mountains of Wyoming Monday afternoon. Snow and wind are
  expected to continue through Tuesday night.

* Snowfall Accumulation...12 to 24 inches are expected, with
  localized amounts up to 30 inches in the Teton mountains.

* Wind and Visibility...West to southwest winds of 25 to 35 mph
  with gusts to 60 mph...especially in open areas or mountain
  summits. Visibility frequently below a quarter mile in heavy
  snow and blowing snow.

* Main Impact...Travel will become very difficult with the wind
  and snow producing slick, snow-packed roads along with high
  drifts over mountain passes. Please monitor JHAVALANCHE.ORG if
  your plans include travel into the backcountry. Also, the
  severely reduced visibility will be very disorientating for
  those recreating in the backcountry.

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.

&&

$$

WYZ014-210000-
/O.UPG.KRIW.WS.A.0011.170221T0000Z-170222T0700Z/
/O.NEW.KRIW.WS.W.0008.170220T1900Z-170222T1200Z/
Wind River Mountains West-
315 AM MST Mon Feb 20 2017

...Winter Storm Warning in effect from noon today to 5 am MST
Wednesday...

The National Weather Service in Riverton has issued a Winter
Storm Warning for snow and blowing snow, which is in effect from
noon today to 5 AM MST Wednesday. The Winter Storm Watch is no
longer in effect.

* Timing...Snow and strong winds are expected to move into the
  western mountains of Wyoming Monday afternoon. Snow and wind are
  expected to continue through Tuesday night.

* Snowfall Accumulation...5 to 10 inches over South Pass. 12 to 24
  inches over the rest of the Wind River Mountains with the
  highest amounts over the western slopes.

* Wind and Visibility...West to southwest winds of 20 to 30 mph
  with gusts to 45 mph on the upper ridges. Visibility frequently
  below a quarter mile in heavy snow and blowing snow.

* Main Impact...Travel may become very difficult or impossible
  across South Pass due to the wind and snow producing slick,
  snow-packed roads along with high drifts.

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.

&&

$$

WYZ015-210000-
/O.NEW.KRIW.WS.W.0008.170220T1900Z-170222T1200Z/
Wind River Mountains East-
315 AM MST Mon Feb 20 2017

...Winter Storm Warning in effect from noon today to 5 am MST
Wednesday...

The National Weather Service in Riverton has issued a Winter
Storm Warning for snow and blowing snow , which is in effect from
noon today to 5 AM MST Wednesday.

* Timing...Snow and strong winds are expected to move into the
  western mountains of Wyoming Monday afternoon. Snow and wind are
  expected to continue through Tuesday night.

* Snowfall Accumulation...5 to 10 inches over South Pass. 12 to 24
  inches over the rest of the Wind River Mountains with the
  highest amounts over the western slopes.

* Wind and Visibility...West to southwest winds of 30 to 40 mph
  with gusts of 60. Wind gusts of 70 mph are expected over South
  Pass Monday afternoon through early Tuesday morning. Near
  whiteout conditions could occur at times in heavy snow and, or
  blowing snow.

* Main Impact...Travel may become very difficult or impossible
  across South Pass due to the wind and snow producing slick,
  snow-packed roads along with high drifts.

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.

&&

$$



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