Hawaii and Guam Concerns; Record Warmth Spreads Eastward; Heavy Snow for Sierra-Nevada; Severe Weather for the Plains

A very active spring pattern with tropical concerns across the Pacific. Heavy rainfall will continue to impact Hawaii this weekend. Meanwhile we continue to monitor a developing typhoon that may affect Guam into early next week. For the Lower 48, heavy snow for mountains of California this weekend, increase threat for severe thunderstorms next week for the Plains and record warmth spreads east. Read More >

Hazardous Weather Conditions

Winter Storm Warning in effect from April 11, 02:00 PM PDT until April 12, 11:00 PM PDT

Current conditions at

Mammoth Yosemite Airport (KMMH)

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

Partly Cloudy

30°F

-1°C

Humidity	46%
Wind Speed	S 16 MPH
Barometer	29.82 in (1009.82 mb)
Dewpoint	12°F (-11°C)
Visibility	10.00 mi
Wind Chill	19°F (-7°C)
Last update	12 Apr 07:15 AM PDT

More Information:

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

Extended Forecast for

9 Miles ESE Mammoth Lakes CA

Winter Storm Warning until April 12, 11:00pm

Click here for hazard details and duration

Winter Storm Warning

Winter Storm Warning until April 12, 11:00pm
NOW until 11:00pm Sun
Winter Storm Warning
Today
High: 23 °F
Heavy Snow
and Very
Windy
Tonight
Low: 8 °F
Chance Snow
Showers and
Windy then
Mostly Clear
and Breezy
Monday
High: 27 °F
Snow Showers
Likely
Monday Night
Low: 11 °F
Partly Cloudy
Tuesday
High: 35 °F
Sunny
Tuesday Night
Low: 17 °F
Mostly Clear
Wednesday
High: 37 °F
Sunny then
Mostly Sunny
and Breezy
Wednesday Night
Low: 20 °F
Mostly Cloudy
and Breezy
then Mostly
Cloudy

Detailed Forecast

Today

Snow showers, mainly before 8am. The snow could be heavy at times. Some thunder is also possible. High near 23. Very windy, with a southwest wind 35 to 40 mph decreasing to 30 to 35 mph in the afternoon. Winds could gust as high as 60 mph. Chance of precipitation is 80%. Total daytime snow accumulation of 3 to 5 inches possible.

Tonight

A 40 percent chance of snow showers before 11pm. Partly cloudy, with a low around 8. Windy, with a southwest wind 25 to 30 mph decreasing to 20 to 25 mph after midnight. Winds could gust as high as 50 mph. New snow accumulation of 1 to 3 inches possible.

Monday

Snow showers likely, mainly after 11am. Some thunder is also possible. Partly sunny, with a high near 27. Southwest wind 10 to 15 mph becoming northwest in the morning. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

Monday Night

Partly cloudy, with a low around 11. West wind 10 to 15 mph, with gusts as high as 25 mph.

Tuesday

Sunny, with a high near 35. Southwest wind around 10 mph.

Tuesday Night

Mostly clear, with a low around 17. Southwest wind 10 to 15 mph.

Wednesday

Mostly sunny, with a high near 37. Breezy.

Wednesday Night

Mostly cloudy, with a low around 20. Breezy.

Thursday

A slight chance of snow showers after 11am. Mostly sunny, with a high near 33. Breezy.