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 >

Current conditions at

Mammoth Yosemite Airport (KMMH)

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

unknown precip

28°F

-2°C

Humidity 42%
Wind Speed SSW 19 MPH
Barometer 29.79 in (1008.81 mb)
Dewpoint 8°F (-13°C)
Visibility 9.00 mi
Wind Chill15°F (-9°C)
Last update 12 Apr 06:15 AM PDT
Extended Forecast for

10 Miles SE 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: 27 °F

    Heavy Snow
    and Windy

  • Tonight

    Tonight: A 40 percent chance of snow showers before 11pm.  Partly cloudy, with a low around 13. Breezy, with a southwest wind 20 to 25 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 40 mph.  New snow accumulation of 1 to 3 inches possible.

    Low: 13 °F

    Chance Snow
    Showers and
    Breezy then
    Mostly Clear

  • Monday

    Monday: Snow showers likely, mainly after 11am. Some thunder is also possible.  Partly sunny, with a high near 31. Southwest wind 5 to 10 mph becoming north in the morning.  Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 31 °F

    Snow Showers
    Likely

  • Monday Night

    Monday Night: Partly cloudy, with a low around 18. West wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 18 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 38. Southwest wind 5 to 10 mph.

    High: 38 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 23. Southwest wind 5 to 15 mph.

    Low: 23 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 25. Breezy.

    Low: 25 °F

    Mostly Cloudy
    and Breezy
    then Partly
    Cloudy

Detailed Forecast

Today
Snow showers, mainly before 8am. The snow could be heavy at times. Some thunder is also possible. High near 27. Windy, with a southwest wind 30 to 35 mph, with gusts as high as 55 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 13. Breezy, with a southwest wind 20 to 25 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 40 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 31. Southwest wind 5 to 10 mph becoming north 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 18. West wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 38. Southwest wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 23. Southwest wind 5 to 15 mph.
Wednesday
Mostly sunny, with a high near 41.
Wednesday Night
Mostly cloudy, with a low around 25. Breezy.
Thursday
Mostly sunny, with a high near 37. Breezy.
Thursday Night
Partly cloudy, with a low around 16. Breezy.
Friday
Sunny, with a high near 40.
Friday Night
Mostly clear, with a low around 22.
Saturday
Sunny, with a high near 45.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
10 Miles SE Mammoth Lakes CA
 37.54°N 118.83°W (Elev. 9216 ft)
4:30 am PDT Apr 12, 2026
6am PDT Apr 12, 2026-6pm PDT Apr 18, 2026
 
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