Snow Squalls May Impact New Year's Eve Travel from the Great Lakes to the Northeast; Heavy Rain Returns to California

An Alberta clipper will bring lake effect snow downwind of the Great Lakes, with the highest snow totals downwind of Lakes Erie and Ontario. Snow squalls may impact New Year's Eve travel during the evening and overnight hours across parts of the Great Lakes, Ohio Valley, and Northeast. Heavy rain will bring a flash flooding threat for southern California on New Year's Eve into New Year's Day. Read More >

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

36°F

2°C

Humidity	39%
Wind Speed	SSW 0 MPH
Barometer	NA
Dewpoint	13°F (-11°C)
Visibility	NA
Last update	30 Dec 03:15 PM MST

More Information:

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

Extended Forecast for

Mammoth WY

This Afternoon
High: 37 °F
Sunny
Tonight
Low: 21 °F
Mostly Clear
Wednesday
High: 43 °F
Sunny
Wednesday Night
Low: 25 °F
Partly Cloudy
New Year's Day
High: 41 °F
Mostly Cloudy
Thursday Night
Low: 32 °F
Slight Chance
Rain/Snow
Friday
High: 42 °F
Slight Chance
Rain/Snow
then Slight
Chance
Showers
Friday Night
Low: 38 °F
Mostly Cloudy
Saturday
High: 45 °F
Chance
Showers

Detailed Forecast

This Afternoon

Sunny, with a high near 37. South southeast wind around 7 mph.

Tonight

Mostly clear, with a low around 21. South southeast wind around 9 mph.

Wednesday

Sunny, with a high near 43. South southeast wind 7 to 10 mph.

Wednesday Night

Partly cloudy, with a low around 25. South southeast wind around 7 mph.

New Year's Day

Mostly cloudy, with a high near 41. South wind around 7 mph.

Thursday Night

A slight chance of rain and snow showers. Snow level 6200 feet. Mostly cloudy, with a low around 32. South wind around 7 mph. Chance of precipitation is 20%.

Friday

A slight chance of rain and snow showers before 11am, then a slight chance of rain showers. Snow level 6400 feet rising to 7000 feet in the afternoon. Mostly cloudy, with a high near 42. South southwest wind 6 to 8 mph. Chance of precipitation is 20%.

Friday Night

Mostly cloudy, with a low around 38.

Saturday

A 40 percent chance of showers, mainly after 11am. Partly sunny, with a high near 45.

Saturday Night

A chance of rain and snow showers, mainly after 11pm. Snow level 6600 feet lowering to 5700 feet after midnight . Mostly cloudy, with a low around 30. Chance of precipitation is 30%.

Sunday

A slight chance of snow showers. Partly sunny, with a high near 39.

Sunday Night

Mostly cloudy, with a low around 28.

Monday

A chance of snow showers. Partly sunny, with a high near 38.