Heavy Lake Effect Snow Downwind of Lakes Erie and Ontario; Fire Weather Concerns in the Southern Plains and Southeast

A multi-day heavy lake effect snow event is expected downwind of Lakes Erie and Ontario through New Year's Day. There is increasing confidence in snow squalls causing bursts of snow & gusty winds on New Year's Eve. Elevated fire weather conditions will continue today over parts of the Southern Plains and across much of the Southeast U.S. Read More >

Hazardous Weather Conditions

Winter Storm Watch in effect from January 2, 04:00 PM PST until January 4, 10:00 AM PST

Current conditions at

Mammoth Yosemite Airport (KMMH)

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

Clear

21°F

-6°C

Humidity	79%
Wind Speed	N 0 MPH
Barometer	30.38 in (1028.79 mb)
Dewpoint	16°F (-9°C)
Visibility	10.00 mi
Last update	30 Dec 02:15 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

Click here for hazard details and duration

Winter Storm Watch

This Afternoon
High: 36 °F
Mostly Cloudy
Tonight
Low: 19 °F
Mostly Cloudy
Wednesday
High: 43 °F
Wintry Mix
Likely
Wednesday Night
Low: 28 °F
Wintry Mix
New Year's Day
High: 46 °F
Rain
Thursday Night
Low: 26 °F
Chance Rain
Friday
High: 46 °F
Chance
Rain/Snow
Friday Night
Low: 26 °F
Rain/Snow
Likely
Saturday
High: 43 °F
Rain/Snow
then Snow

Detailed Forecast

This Afternoon

Mostly cloudy, with a high near 36. Northwest wind around 5 mph.

Tonight

Mostly cloudy, with a low around 19. Calm wind.

Wednesday

A chance of rain, snow, and freezing rain before 11am, then rain and snow likely. Snow level 8000 feet. Cloudy, with a high near 43. Calm wind becoming northeast around 5 mph. Chance of precipitation is 70%. Little or no ice accumulation expected. Little or no snow accumulation expected.

Wednesday Night

Rain, snow, and freezing rain before 4am, then freezing rain, possibly mixed with rain between 4am and 5am, then freezing rain, possibly mixed with snow after 5am. Snow level 8400 feet rising to 8900 feet after midnight. Low around 28. Calm wind. Chance of precipitation is 80%. Little or no snow accumulation expected.

New Year's Day

Rain, mainly before 4pm. Snow level 8700 feet. High near 46. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 80%.

Thursday Night

A 30 percent chance of rain, mainly before 10pm. Snow level 8300 feet. Partly cloudy, with a low around 26. Southwest wind around 5 mph.

Friday

A chance of rain and snow between 10am and 1pm, then a chance of rain after 1pm. Snow level 7600 feet. Mostly sunny, with a high near 46. Chance of precipitation is 30%. Little or no snow accumulation expected.

Friday Night

A chance of rain before 7pm, then rain and snow likely. Snow level 7300 feet. Mostly cloudy, with a low around 26.

Saturday

Rain and snow likely before 10am, then snow. Snow level 6900 feet. Mostly cloudy, with a high near 43.

Saturday Night

Snow likely, mainly before 4am. Mostly cloudy, with a low around 21.

Sunday

Snow likely. Mostly cloudy, with a high near 42.

Sunday Night

A chance of snow. Mostly cloudy, with a low around 19.

Monday

A chance of snow. Partly sunny, with a high near 41.