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

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WWUS45 KRIW 220607
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
1107 PM MST Tue Feb 21 2017

...Heavy snow may impact Central and Southern Wyoming for Late
Wednesday night through mid day Friday...

.Southwest flow aloft with a deep moisture plume will continue to
produce periods of moderate to heavy snow with strong winds at
ridge top and pass level tonight although the snowfall intensity
and strong winds will gradually diminish tonight. Snow will
continue in the Jackson Valley but will only accumulate around
1 to 2 inches this evening. The Star Valley will have rain
turning to snow by 4 pm this afternoon. Some light snow will
continue with low accumulations Wednesday and Wednesday night
with much colder temperatures.

A separate strong winter storm will deliver a heavy dose of
snowfall to much of Central and Southern Wyoming, east of the
Divide, by late Wednesday night and continue through mid day
Friday. The heaviest snowfall should occur between 2 am Wednesday
night through 11 am Thursday. As much as 2 feet of snow could
accumulate on Casper Mountain by Friday with as much much as a
foot and a half in the Casper area. 6 to 10 inches could fall
over much of the rest of the area. In addition, strong northeast
winds may result in considerable blowing and drifting snow,
especially around the Casper area.

WYZ014-015-222200-
/O.CAN.KRIW.WS.W.0008.000000T0000Z-170222T1200Z/
/O.CON.KRIW.WS.A.0012.170223T0600Z-170224T1800Z/
Wind River Mountains West-Wind River Mountains East-
1107 PM MST Tue Feb 21 2017

...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY EVENING
THROUGH FRIDAY MORNING...
...WINTER STORM WARNING IS CANCELLED...

The National Weather Service in Riverton has cancelled the Winter
Storm Warning. However, a Winter Storm Watch is now in effect from
Wednesday evening through Friday morning.

* Timing...Snow is expected to redevelop late Wednesday night and
  continue through mid day Friday, heavy at times. Snow will
  continue through the day Thursday, Thursday night and through
  mid day Friday. The heaviest snowfall will likely occur between
  2 am Wednesday night through 11 am Thursday morning.

* Snowfall Accumulation...8 to 12 inches are expected, mainly on
  the southern end of the mountains.

* Main Impact...Travel may become difficult across South Pass due
  to the snow producing slick, snow- packed roads. Periods of
  heavy snow may significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A winter storm watch means there is a potential for significant
snow and/or blowing snow that may impact travel. Continue to
monitor the latest forecasts.

&&

$$

WYZ001-002-012-024-220715-
/O.CAN.KRIW.WS.W.0008.000000T0000Z-170222T1200Z/
Yellowstone National Park-Absaroka Mountains-
Teton and Gros Ventre Mountains-Salt River and Wyoming Ranges-
Including the cities of Lake, Mammoth, and Old Faithful
1107 PM MST Tue Feb 21 2017

...WINTER STORM WARNING IS CANCELLED...

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

Light snow lingers across the area. Little additional accumulation
is possible tonight.

$$

WYZ020-022-222200-
/O.CON.KRIW.WS.A.0012.170223T0600Z-170224T1800Z/
Natrona County Lower Elevations-Casper Mountain-
Including the city of Casper
1107 PM MST Tue Feb 21 2017

...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY EVENING
THROUGH FRIDAY MORNING...

* TIMING...Snow will develop Wednesday night and may become
  heavy at times after 2 am. Snow heavy at times will continue
  through the day Thursday, Thursday night and through mid day
  Friday. The heaviest snowfall will likely occur between 2 am
  Wednesday night through 11 am Thursday morning.

* SNOWFALL ACCUMULATION...Ranging from up to 2 feet on Casper
  Mountain, up to a foot and a half in the vicinity of the city
  of Casper and 9 to 12 inches across Northern and Western
  Natrona County.

* MAIN IMPACT...Roads may become slick and snow covered.
  Considerable blowing and drifting snow could make travel
  difficult to impossible. The visibility may become
  significantly reduced in blowing snow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A winter storm watch means there is a potential for significant
snow and/or blowing snow that may impact travel. Continue to
monitor the latest forecasts.

&&

$$

WYZ019-222200-
/O.CON.KRIW.WS.A.0012.170223T0600Z-170224T1800Z/
Green Mountains and Rattlesnake Range-
Including the city of Jeffrey City
1107 PM MST Tue Feb 21 2017

...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY EVENING
THROUGH FRIDAY MORNING...

* TIMING...Snow will develop Wednesday night and may become
  heavy at times after 2 am. Snow heavy at times will continue
  through the day Thursday, Thursday night and through mid day
  Friday. The heaviest snowfall will likely occur between 2 am
  Wednesday night through 11 am Thursday morning.

* SNOWFALL ACCUMULATION...10 to 16 inches.

* MAIN IMPACT...Roads may become slick and snow covered. Blowing
  and drifting snow may significantly reduce visibility and could
  make travel rather difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A winter storm watch means there is a potential for significant
snow and/or blowing snow that may impact travel. Continue to
monitor the latest forecasts.

&&

$$

WYZ030-222200-
/O.CON.KRIW.WS.A.0012.170223T0600Z-170224T1800Z/
East Sweetwater County-
Including the city of Wamsutter
1107 PM MST Tue Feb 21 2017

...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY EVENING
THROUGH FRIDAY MORNING...

* TIMING...Snow will develop Wednesday night and may become heavy
  at times after 2 am. Snow will continue through the day
  Thursday, Thursday night and through mid day Friday. The
  heaviest snowfall will likely occur between 2 am Wednesday night
  through 11 am Thursday morning.

* SNOWFALL ACCUMULATION...Ranging from 5 to 8 inches in Central
  Sweetwater County to up to 15 inches in Eastern Sweetwater
  County.

* MAIN IMPACT...Roads may become slick and snow covered. Blowing
  and drifting snow may significantly reduce visibility and could
  make travel rather difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A winter storm watch means there is a potential for significant
snow and/or blowing snow that may impact travel. Continue to
monitor the latest forecasts.

&&

$$

WYZ017-018-222200-
/O.CON.KRIW.WS.A.0012.170223T0600Z-170224T1800Z/
Wind River Basin-Lander Foothills-
Including the cities of Riverton, Shoshoni, and Lander
1107 PM MST Tue Feb 21 2017

...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY EVENING
THROUGH FRIDAY MORNING...

* TIMING...Snow will develop Wednesday night and may become heavy
  at times after 2 am. Snow will continue through the day
  Thursday, Thursday night and through mid day Friday. The
  heaviest snowfall will likely occur between 2 am Wednesday night
  through 11 am Thursday morning.

* SNOWFALL ACCUMULATION...10 to 13 inches in Eastern Fremont
  County, 6 to 10 inches in the Riverton/Lander area, and 3 to 5
  inches around Kinnear and Pavillion.

* MAIN IMPACT...Roads may become slick and snow covered. Blowing
  and drifting snow may significantly reduce visibility and could
  make travel rather difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A winter storm watch means there is a potential for significant
snow and/or blowing snow that may impact travel. Continue to
monitor the latest forecasts.

&&

$$

WYZ007-222200-
/O.CON.KRIW.WS.A.0012.170223T0600Z-170224T1800Z/
Owl Creek and Bridger Mountains-
1107 PM MST Tue Feb 21 2017

...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY EVENING
THROUGH FRIDAY MORNING...

* TIMING...Snow will develop Wednesday night and may become heavy
  at times after 2 am. Snow will continue through the day
  Thursday, Thursday night and through mid day Friday. The
  heaviest snowfall will likely occur between 2 am Wednesday night
  through 11 am Thursday morning.

* SNOWFALL ACCUMULATION...6 to 10 inches.

* MAIN IMPACT...Roads may become slick and snow covered. Blowing
  and drifting snow could make travel rather difficult, including
  travel through the Wind River Canyon. Blowing snow may
  significantly reduce visibility, especially at the southern end
  of the Wind River Canyon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A winter storm watch means there is a potential for significant
snow and/or blowing snow that may impact travel. Continue to
monitor the latest forecasts.

&&

$$

WYZ011-222200-
/O.CON.KRIW.WS.A.0012.170223T0600Z-170224T1800Z/
Southeast Johnson County-
Including the city of Kaycee
1107 PM MST Tue Feb 21 2017

...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY EVENING
THROUGH FRIDAY MORNING...

* TIMING...Snow will develop Wednesday night and may become heavy
  at times after 2 am. Snow will continue through the day
  Thursday, Thursday night and through mid day Friday. The
  heaviest snowfall will likely occur between 2 am Wednesday night
  through 11 am Thursday morning.

* SNOWFALL ACCUMULATION...6 to 10 inches with the heaviest
  snowfall expected near the Natrona County line.

* MAIN IMPACT...Roads may become slick and snow covered. Blowing
  and drifting snow may significantly reduce visibility and could
  make travel rather difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A winter storm watch means there is a potential for significant
snow and/or blowing snow that may impact travel. Continue to
monitor the latest forecasts.

&&

$$



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