Snow Squalls May Impact New Year's Eve Travel from the Great Lakes to the Mid-Atlantic; Heavy Rain & Isolated Severe Thunderstorms in Southern California

Snow squalls are likely to cross the Lower Great Lakes this evening and the Ohio Valley through the interior Northeast/northern Mid-Atlantic overnight, before potentially reaching the I-95 corridor from D.C. to New York City early New Year’s Day morning. Heavy rain and isolated severe thunderstorms will impact coastal southern California including Los Angeles tonight into early on New Year's Day. Read More >

Hazardous Weather Conditions

Current conditions at

Mammoth Yosemite Airport (KMMH)

Lat: 37.6241°NLon: 118.8423°WElev: 7112.0ft.

Partly Cloudy

34°F

1°C

Humidity	74%
Wind Speed	N 0 MPH
Barometer	30.17 in (1021.67 mb)
Dewpoint	26°F (-3°C)
Visibility	10.00 mi
Last update	31 Dec 02:55 PM PST

More Information:

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

Extended Forecast for

10 Miles ESE Mammoth Lakes CA

Winter Storm Watch January 2, 04:00pm until January 4, 10:00am

Winter Weather Advisory December 31, 04:00pm until January 1, 12:00pm

Click here for hazard details and duration

Winter Storm Watch

Winter Weather Advisory

This Afternoon
High: 40 °F
Snow Likely
Tonight
Low: 29 °F
Snow
New Year's Day
High: 37 °F
Snow and
Breezy
Thursday Night
Low: 22 °F
Chance Snow
and Windy
then Partly
Cloudy and
Breezy
Friday
High: 39 °F
Mostly Sunny
and Breezy
Friday Night
Low: 24 °F
Chance Snow
and Windy
then Snow
Likely and
Very Windy
Saturday
High: 37 °F
Heavy Snow
and Very
Windy
Saturday Night
Low: 23 °F
Heavy Snow
and Windy
Sunday
High: 33 °F
Heavy Snow
and Very
Windy

Detailed Forecast

This Afternoon

Snow likely. Cloudy, with a high near 40. Southeast wind around 10 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

Tonight

Snow, mainly before 4am. Low around 29. Southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.

New Year's Day

Snow, mainly before 4pm. High near 37. Breezy, with a southwest wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

Thursday Night

A 30 percent chance of snow before 10pm. Partly cloudy, with a low around 22. Windy, with a southwest wind 20 to 30 mph, with gusts as high as 40 mph. Little or no snow accumulation expected.

Friday

Mostly sunny, with a high near 39. Breezy, with a south wind 15 to 20 mph, with gusts as high as 35 mph.

Friday Night

Snow likely, mainly after 4am. Mostly cloudy, with a low around 24. Very windy, with a southwest wind 30 to 40 mph, with gusts as high as 55 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

Saturday

Snow. The snow could be heavy at times. High near 37. Very windy. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.

Saturday Night

Snow. The snow could be heavy at times. Cloudy, with a low around 23. Windy.

Sunday

Snow. The snow could be heavy at times. Cloudy, with a high near 33. Very windy.

Sunday Night

Snow. The snow could be heavy at times. Mostly cloudy, with a low around 20. Windy.

Monday

Snow likely. The snow could be heavy at times. Mostly cloudy, with a high near 32. Windy.

Monday Night

Snow likely. Mostly cloudy, with a low around 19. Windy.