Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

A winter storm system will rapidly intensify over the Midwest on Sunday and track through the Great Lakes on Monday. Periods of heavy snow are anticipated across the Upper Great Lakes late Sunday and continuing into Monday. At least 1/10 inch of ice accumulation is expected from a wintry mix across much of the interior Northeast U.S. starting Sunday afternoon. Read More >

Hazardous Weather Conditions

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

Lat: 44.977222°NLon: 110.695278°WElev: 6138.0ft.

19°F

-7°C

Humidity	54%
Wind Speed	NW 9 MPH
Barometer	NA
Dewpoint	5°F (-15°C)
Visibility	NA
Wind Chill	8°F (-13°C)
Last update	27 Dec 04:15 PM MST

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

3 Miles SSW Mammoth Hot Springs WY

Winter Weather Advisory December 27, 04:56pm until December 27, 05:00pm

Click here for hazard details and duration

Winter Weather Advisory

Winter Weather Advisory December 27, 04:56pm until December 27, 05:00pm
NOW until 5:00pm Sat
Winter Weather Advisory
This Afternoon
High: 12 °F
Chance Snow
Showers
Tonight
Low: -3 °F
Slight Chance
Snow Showers
then Mostly
Clear
Sunday
High: 15 °F
Sunny
Sunday Night
Low: 2 °F
Mostly Clear
Monday
High: 24 °F
Sunny
Monday Night
Low: 10 °F
Partly Cloudy
Tuesday
High: 29 °F
Mostly Sunny
Tuesday Night
Low: 12 °F
Mostly Clear

Detailed Forecast

This Afternoon

A 30 percent chance of snow showers, mainly before 5pm. Some thunder is also possible. Partly sunny, with a steady temperature around 12. Wind chill values as low as -5. West northwest wind around 11 mph.

Tonight

A 20 percent chance of snow showers before 9pm. Partly cloudy, with a low around -3. Wind chill values as low as -15. West southwest wind 6 to 11 mph.

Sunday

Sunny, with a high near 15. Wind chill values as low as -15. Southwest wind around 6 mph.

Sunday Night

Mostly clear, with a low around 2. Wind chill values as low as -10. South wind 5 to 7 mph.

Monday

Sunny, with a high near 24. South wind around 6 mph.

Monday Night

Partly cloudy, with a low around 10. South wind around 7 mph.

Tuesday

Mostly sunny, with a high near 29. South wind 3 to 6 mph.

Tuesday Night

Mostly clear, with a low around 12.