Super Typhoon Sinlaku to Impact the Marianas and Guam; Severe Weather Threat from the Central Plains to the Great Lakes

Super Typhoon Sinlaku will bring destructive winds, widespread heavy rain/flooding, and thunderstorms to the Marianas Islands into Wednesday. Tropical Storm conditions are likely over Guam. Severe thunderstorms and heavy rain are likely across the Upper Mississippi Valley and Great Lakes region with potential for large to very large hail, damaging wind, and tornadoes through Tuesday. Read More >

Current conditions at

POR31-Iron Horse (LIB09)

Lat: 39.77898°NLon: 120.50284°WElev: 5001.0ft.

NA

48°F

9°C

Humidity 53%
Wind Speed WNW 3 MPH
Barometer NA
Dewpoint 31°F (-1°C)
Visibility NA
Last update 13 Apr 04:20 PM PDT
Extended Forecast for

2 Miles SSW Portola CA

  • Tonight

    Tonight: Partly cloudy, with a low around 25. West wind around 5 mph becoming calm  in the evening.

    Low: 25 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 55. Light and variable wind becoming west 5 to 10 mph in the afternoon.

    High: 55 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 30. West wind 5 to 10 mph becoming light southwest  in the evening.

    Low: 30 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 54. Southwest wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 54 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of rain showers before 2am, then a chance of rain and snow showers.  Snow level 6700 feet lowering to 5200 feet after midnight . Mostly cloudy, with a low around 28. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 50%. Little or no snow accumulation expected.

    Low: 28 °F

    Chance
    Showers then
    Chance
    Rain/Snow

  • Thursday

    Thursday: A 30 percent chance of snow showers before 11am.  Mostly cloudy, then gradually becoming sunny, with a high near 48. West wind 5 to 10 mph becoming north in the morning.  Little or no snow accumulation expected.

    High: 48 °F

    Chance Snow
    Showers then
    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 20.

    Low: 20 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 26.

    Low: 26 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 25. West wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 55. Light and variable wind becoming west 5 to 10 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 30. West wind 5 to 10 mph becoming light southwest in the evening.
Wednesday
Mostly sunny, with a high near 54. Southwest wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Wednesday Night
A chance of rain showers before 2am, then a chance of rain and snow showers. Snow level 6700 feet lowering to 5200 feet after midnight . Mostly cloudy, with a low around 28. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Thursday
A 30 percent chance of snow showers before 11am. Mostly cloudy, then gradually becoming sunny, with a high near 48. West wind 5 to 10 mph becoming north in the morning. Little or no snow accumulation expected.
Thursday Night
Clear, with a low around 20.
Friday
Sunny, with a high near 58.
Friday Night
Partly cloudy, with a low around 26.
Saturday
Mostly sunny, with a high near 62.
Saturday Night
Partly cloudy, with a low around 32.
Sunday
A chance of showers. Snow level 6500 feet. Partly sunny, with a high near 55.
Sunday Night
A chance of rain and snow showers. Snow level 6700 feet lowering to 5300 feet after midnight . Mostly cloudy, with a low around 28.
Monday
A chance of showers. Snow level rising to 5600 feet in the afternoon. Partly sunny, with a high near 52.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW Portola CA
 39.79°N 120.49°W (Elev. 4987 ft)
4:30 pm PDT Apr 13, 2026
4pm PDT Apr 13, 2026-6pm PDT Apr 20, 2026
 
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Additional Resources

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