025
WWUS45 KRIW 031956
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
1256 PM MST Sat Jan 3 2026

WYZ001-041400-
/O.CON.KRIW.WW.Y.0002.260104T0600Z-260105T1800Z/
Yellowstone National Park-
Including the cities of Lake, Mammoth, and Old Faithful
1256 PM MST Sat Jan 3 2026

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 11 PM THIS EVENING
TO 11 AM MST MONDAY...

* WHAT...Snow expected. Total snow accumulations 4 to 8 inches with
  lesser amounts nearby Mammoth. Locally higher amounts up to 16
  inches near the South Entrance and up to 2 feet in southwestern
  portions of the park. Winds gusting as high as 45 mph tonight
  through Sunday morning.

* WHERE...Yellowstone National Park.

* WHEN...From 11 PM this evening to 11 AM MST Monday.

* IMPACTS...Travel could be very difficult. The hazardous conditions
  could impact the Monday morning commute.

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.

&&

$$

WYZ012-041400-
/O.CON.KRIW.WW.Y.0002.260104T0600Z-260105T1800Z/
Teton and Gros Ventre Mountains-
1256 PM MST Sat Jan 3 2026

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 11 PM THIS EVENING
TO 11 AM MST MONDAY...

* WHAT...Snow expected. Total snow accumulations between 8 and 16
  inches. Locally higher amounts up to 2 feet in the Tetons. Winds
  gusting as high as 40 mph tonight into Sunday morning.

* WHERE...Teton and Gros Ventre Mountains.

* WHEN...From 11 PM this evening to 11 AM MST Monday.

* IMPACTS...Travel could be very difficult. The hazardous conditions
  could impact the Monday morning commute 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.

&&

$$

WYZ014-041400-
/O.CON.KRIW.WW.Y.0002.260104T0600Z-260105T1800Z/
Wind River Mountains West-
1256 PM MST Sat Jan 3 2026

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 11 PM THIS EVENING
TO 11 AM MST MONDAY...

* WHAT...Snow expected. Total snow accumulations 4 to 8 inches with
  locally higher amounts of 12 to 16 inches. Snow expected over
  South Pass tonight and Sunday evening. Winds gusting as high as 40
  mph.

* WHERE...Wind River Mountains West.

* WHEN...From 11 PM this evening to 11 AM MST Monday.

* IMPACTS...Travel could be very difficult. The hazardous conditions
  could impact the Sunday morning and evening commutes.

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.

&&

$$

WYZ024-041400-
/O.CON.KRIW.WW.Y.0002.260104T0600Z-260105T1800Z/
Salt River and Wyoming Ranges-
1256 PM MST Sat Jan 3 2026

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 11 PM THIS EVENING
TO 11 AM MST MONDAY...

* WHAT...Snow expected. Total snow accumulations between 6 and 12
  inches, with locally higher amounts of 12 to 18 inches. Winds
  gusting as high as 40 mph tonight into Sunday morning.

* WHERE...Salt River and Wyoming Ranges.

* WHEN...From 11 PM this evening to 11 AM MST Monday.

* IMPACTS...Travel could be very difficult. The hazardous conditions
  could impact the Sunday morning and evening commutes.

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/ .

Dziewaltowski