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.

snow,freezing fog

32°F

0°C

Humidity	100%
Wind Speed	NNE 5 MPH
Barometer	29.74 in (1007.11 mb)
Dewpoint	32°F (0°C)
Visibility	0.25 mi
Wind Chill	27°F (-3°C)
Last update	12 Apr 01:35 AM PDT

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 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
Overnight
Low: 19 °F
Heavy Snow
and Very
Windy
Sunday
High: 33 °F
Snow Showers
and Very
Windy
Sunday Night
Low: 15 °F
Chance Snow
Showers and
Windy then
Mostly Clear
and Breezy
Monday
High: 36 °F
Chance Snow
Showers
Monday Night
Low: 18 °F
Partly Cloudy
Tuesday
High: 44 °F
Sunny
Tuesday Night
Low: 23 °F
Mostly Clear
Wednesday
High: 46 °F
Sunny then
Mostly Sunny
and Breezy

Detailed Forecast

Overnight

Snow showers. The snow could be heavy at times. Some thunder is also possible. Low around 19. Very windy, with a southwest wind around 45 mph, with gusts as high as 65 mph. Chance of precipitation is 90%. Total nighttime snow accumulation of 6 to 10 inches possible.

Sunday

Snow showers, mainly before 11am. Some thunder is also possible. High near 33. Very windy, with a southwest wind 35 to 40 mph decreasing to 25 to 30 mph in the afternoon. Winds could gust as high as 55 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

Sunday Night

A 40 percent chance of snow showers before 11pm. Partly cloudy, with a low around 15. Windy, with a southwest wind 25 to 30 mph decreasing to 15 to 20 mph after midnight. Winds could gust as high as 45 mph. New snow accumulation of around an inch possible.

Monday

A 50 percent chance of snow showers, mainly after 11am. Some thunder is also possible. Partly sunny, with a high near 36. West wind 5 to 10 mph becoming northwest in the morning. New snow accumulation of less than one inch possible.

Monday Night

Partly cloudy, with a low around 18. West wind 10 to 15 mph, with gusts as high as 25 mph.

Tuesday

Sunny, with a high near 44. Southwest wind around 10 mph.

Tuesday Night

Mostly clear, with a low around 23.

Wednesday

Mostly sunny, with a high near 46. Breezy.

Wednesday Night

Mostly cloudy, with a low around 25.

Thursday

Mostly sunny, with a high near 43.