549
WWUS45 KRIW 120719
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
119 AM MDT Wed Mar 12 2025

WYZ001-130000-
/O.NEW.KRIW.WW.Y.0014.250313T1200Z-250314T1200Z/
Yellowstone National Park-
Including the cities of Lake, Mammoth, and Old Faithful
119 AM MDT Wed Mar 12 2025

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

* WHAT...Snow expected. Total snow accumulations between 6 and 12
  inches in southwestern Yellowstone Park; 4 to 8 inches for most of
  the Park; 3 to 5 inches around Mammoth. Winds gusting as high as
  40 mph.

* WHERE...Yellowstone National Park.

* WHEN...From 6 AM Thursday to 6 AM MDT Friday.

* IMPACTS...Travel could be difficult. People should exercise
  caution if traveling into the backcountry.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

For graphical depictions of the snowfall forecast, including the
official NWS forecast, high end amounts, and low end amounts, visit
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of
Transportation, visit https://wyoroad.info .

&&

$$

WYZ012-130000-
/O.NEW.KRIW.WW.Y.0014.250313T1200Z-250314T1200Z/
Teton and Gros Ventre Mountains-
119 AM MDT Wed Mar 12 2025

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

* WHAT...Snow expected. Total snow accumulations between 5 and 10
  inches. Winds gusting as high as 35 mph.

* WHERE...Teton and Gros Ventre Mountains.

* WHEN...From 6 AM Thursday to 6 AM MDT Friday.

* IMPACTS...Travel could be difficult. The hazardous conditions
  could impact travel over Teton and Togwotee Passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

For graphical depictions of the snowfall forecast, including the
official NWS forecast, high end amounts, and low end amounts, visit
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of
Transportation, visit https://wyoroad.info .

&&

$$

WYZ014-015-130000-
/O.NEW.KRIW.WW.Y.0014.250313T1200Z-250314T1800Z/
Wind River Mountains West-Wind River Mountains East-
119 AM MDT Wed Mar 12 2025

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

* WHAT...Snow expected. Total snow accumulations between 5 and 10
  inches. Winds gusting as high as 50 mph.

* WHERE...Wind River Mountains.

* WHEN...From 6 AM Thursday to noon MDT Friday.

* IMPACTS...Travel could be difficult. The hazardous conditions
  could impact travel over South Pass.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

For graphical depictions of the snowfall forecast, including the
official NWS forecast, high end amounts, and low end amounts, visit
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of
Transportation, visit https://wyoroad.info .

&&

$$

WYZ024-130000-
/O.NEW.KRIW.WW.Y.0014.250313T1200Z-250314T1200Z/
Salt River and Wyoming Ranges-
119 AM MDT Wed Mar 12 2025

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

* WHAT...Snow expected. Total snow accumulations between 5 and 9
  inches. Winds gusting as high as 40 mph.

* WHERE...Salt River and Wyoming Ranges.

* WHEN...From 6 AM Thursday to 6 AM MDT Friday.

* IMPACTS...Travel could be difficult. The hazardous conditions
  could impact travel over Salt Pass.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

For graphical depictions of the snowfall forecast, including the
official NWS forecast, high end amounts, and low end amounts, visit
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of
Transportation, visit https://wyoroad.info .

&&

$$

For more information from the National Weather Service, visit
https://weather.gov/riw/ .

Hattings