Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. Read More >

Current conditions at

ROCK CREEK (RCEC1)

Lat: 37.55983°NLon: 118.67841°WElev: 7103.0ft.

NA

29°F

-2°C

Humidity 63%
Wind Speed W 3 MPH
Barometer NA
Dewpoint 18°F (-8°C)
Visibility NA
Last update 20 Jan 06:04 PM PST
Extended Forecast for

17 Miles SE Mammoth Lakes CA

  • Tonight

    Tonight: Mostly cloudy, with a low around 22. Southwest wind 5 to 10 mph.

    Low: 22 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 47. Southwest wind 5 to 10 mph.

    High: 47 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 10 percent chance of snow after 4am.  Cloudy, with a low around 21. West wind 5 to 10 mph.

    Low: 21 °F

    Cloudy then
    Slight Chance
    Snow

  • Thursday

    Thursday: A 30 percent chance of snow, mainly between 10am and 4pm.  Mostly cloudy, with a high near 43. North wind around 10 mph.  Little or no snow accumulation expected.

    High: 43 °F

    Chance Snow

  • Thursday Night

    Thursday Night: A 20 percent chance of snow before 10pm.  Mostly cloudy, with a low around 19. West wind 5 to 10 mph.

    Low: 19 °F

    Slight Chance
    Snow then
    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 39. Northwest wind around 10 mph.

    High: 39 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 12.

    Low: 12 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 34.

    High: 34 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 9.

    Low: 9 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 22. Southwest wind 5 to 10 mph.
Wednesday
Mostly cloudy, with a high near 47. Southwest wind 5 to 10 mph.
Wednesday Night
A 10 percent chance of snow after 4am. Cloudy, with a low around 21. West wind 5 to 10 mph.
Thursday
A 30 percent chance of snow, mainly between 10am and 4pm. Mostly cloudy, with a high near 43. North wind around 10 mph. Little or no snow accumulation expected.
Thursday Night
A 20 percent chance of snow before 10pm. Mostly cloudy, with a low around 19. West wind 5 to 10 mph.
Friday
Mostly sunny, with a high near 39. Northwest wind around 10 mph.
Friday Night
Partly cloudy, with a low around 12.
Saturday
Sunny, with a high near 34.
Saturday Night
Mostly clear, with a low around 9.
Sunday
Mostly sunny, with a high near 39.
Sunday Night
Partly cloudy, with a low around 13.
Monday
Mostly sunny, with a high near 41.
Monday Night
Partly cloudy, with a low around 16.
Tuesday
Mostly sunny, with a high near 44.
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ABOUT THIS FORECAST

 
Point Forecast:
17 Miles SE Mammoth Lakes CA
 37.49°N 118.76°W (Elev. 10397 ft)
1:15 pm PST Jan 20, 2026
7pm PST Jan 20, 2026-6pm PST Jan 27, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database