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

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WWUS45 KRIW 202022
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
222 PM MDT Wed Sep 20 2017

...A New Storm System Will Take Aim On Western Wyoming Tonight Into
At Least Friday...

.The large, cold, and wet pacific Pacific storm will move quickly
into much of Western Wyoming this evening and continue to affect
western and northwestern Wyoming through Friday. Isolated snow
showers this afternoon will increase to to numerous across the
western and northwestern mountains this evening. Heavier snowfall is
across the Teton, Gros Ventre, and Wind River Mountains above 8500
feet where from 8 to 20 inches of snow can be expected through noon
Friday.

WYZ014-015-211200-
/O.CON.KRIW.WS.W.0018.170921T0300Z-170922T1800Z/
Wind River Mountains West-Wind River Mountains East-
222 PM MDT Wed Sep 20 2017

...WINTER STORM WARNING REMAINS IN EFFECT FROM 9 PM THIS EVENING TO
NOON MDT FRIDAY...

* TIMING...A few isolated snow showers this afternoon will give way
  to moderate to heavy snow tonight over the Wind River Mountains...
  continuing through Friday morning. Total snowfall will range from
  10 to 20 inches above 8500 feet with snow accumulations of 4 to 10
  inches from 7500 to 8500 feet. Any precipitation over South Pass
  will likely remain rain tonight and Thursday before changing over
  to snow later Thursday night.

* SNOWFALL...10 to 20 inches above 8500 feet with 4 to 10 inches
  down to 7500 feet. The higher amounts will be on the north half of
  the range.

* MAIN IMPACT...Heavy snow will make travel difficult at times...
  mainly over Togwotee Pass.

* OTHER IMPACTS...Campers and hunters should be prepared for cold
  snowy and windy conditions.

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.

&&

$$

WYZ012-211200-
/O.CON.KRIW.WS.W.0018.170921T0300Z-170922T1800Z/
Teton and Gros Ventre Mountains-
222 PM MDT Wed Sep 20 2017

...WINTER STORM WARNING REMAINS IN EFFECT FROM 9 PM THIS EVENING TO
NOON MDT FRIDAY...

* TIMING...A few isolated snow showers this afternoon will give way
  to moderate to heavy snow tonight over the Teton and Gros Ventre
  Mountains...continuing through Friday morning. Total snowfall will
  range from 8 to 18 inches above 8500 feet with snow accumulations
  of 3 to 8 inches from 7500 to 8500 feet.

* SNOWFALL...8 to 18 inches above 8500 feet with 3 to 8 inches down
  to 7500 feet.

* MAIN IMPACT...Heavy snow will make travel difficult at times
  including over Teton Pass.

* OTHER IMPACTS...Campers and hunters should be prepared for cold
  snowy and windy conditions.

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.

&&

$$

WYZ024-211200-
/O.EXT.KRIW.WW.Y.0032.170921T0300Z-170922T1800Z/
Salt River and Wyoming Ranges-
222 PM MDT Wed Sep 20 2017

...WINTER WEATHER ADVISORY NOW IN EFFECT FROM 9 PM THIS EVENING
TO NOON MDT FRIDAY...

* TIMING...A few isolated snow showers this afternoon will give way
  to moderate to occasionally heavy snow tonight over the Salt and
  Wyoming Mountains...continuing through Friday morning. Total
  snowfall will range from 4 to 12 inches above 8500 feet with snow
  accumulations of 2 to 4 inches from 7500 to 8500 feet.

* SNOWFALL...4 to 12 inches above 8500 feet with 2 to 4 inches down
  to 7500 feet.

* MAIN IMPACT...Heavy snow will make travel difficult at times.

* OTHER IMPACTS...Campers and hunters should be prepared for cold
  snowy and windy conditions.

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.

&&

$$

WYZ001-002-211200-
/O.CON.KRIW.WW.Y.0032.170921T0300Z-170922T1800Z/
Yellowstone National Park-Absaroka Mountains-
Including the cities of Lake, Mammoth, and Old Faithful
222 PM MDT Wed Sep 20 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING
TO NOON MDT FRIDAY...

* TIMING...A few isolated snow showers this afternoon will give way
  to moderate snow tonight over Yellowstone and the Absaroka
  mountains... continuing through Friday morning. Total snowfall
  will range from 6 to 12 inches above 8500 feet with snow
  accumulations of 3 to 6 inches from 7500 to 8500 feet.

* SNOWFALL...6 to 12 inches above 8500 feet with 3 to 6 inches down
  to 7500 feet.

* MAIN IMPACT...Moderate to occasionally heavy snow will make travel
  difficult at times.

* OTHER IMPACTS...Campers and hunters should be prepared for cold
  snowy and windy conditions.

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.

&&

$$

Team Riverton



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