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

28°F

-2°C

Humidity 97%
Wind Speed N 0 MPH
Barometer NA
Dewpoint 27°F (-3°C)
Visibility NA
Last update 13 Apr 06:20 AM PDT
Extended Forecast for

2 Miles SSW Portola CA

  • Today

    Today: Mostly sunny, with a high near 50. Calm wind becoming west around 5 mph in the afternoon.

    High: 50 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 24. West wind around 5 mph becoming calm  in the evening.

    Low: 24 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 54. Light and variable wind becoming west 5 to 10 mph in the afternoon.

    High: 54 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 29. Southwest wind 5 to 10 mph.

    Low: 29 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 53. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 53 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Rain showers likely before 2am, then snow showers likely, possibly mixed with rain.  Snow level 6800 feet lowering to 6100 feet after midnight . Mostly cloudy, with a low around 26. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 26 °F

    Showers
    Likely then
    Rain/Snow
    Likely

  • Thursday

    Thursday: A chance of rain and snow showers before 8am, then a chance of snow showers between 8am and 11am.  Mostly cloudy, then gradually becoming sunny, with a high near 46. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 46 °F

    Chance
    Rain/Snow
    then Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 20.

    Low: 20 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 50. Calm wind becoming west around 5 mph in the afternoon.
Tonight
Partly cloudy, with a low around 24. West wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 54. Light and variable wind becoming west 5 to 10 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 29. Southwest wind 5 to 10 mph.
Wednesday
Partly sunny, with a high near 53. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Rain showers likely before 2am, then snow showers likely, possibly mixed with rain. Snow level 6800 feet lowering to 6100 feet after midnight . Mostly cloudy, with a low around 26. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Thursday
A chance of rain and snow showers before 8am, then a chance of snow showers between 8am and 11am. Mostly cloudy, then gradually becoming sunny, with a high near 46. Chance of precipitation is 30%. Little or no snow accumulation expected.
Thursday Night
Clear, with a low around 20.
Friday
Sunny, with a high near 57.
Friday Night
Mostly clear, with a low around 26.
Saturday
Mostly sunny, with a high near 62.
Saturday Night
Partly cloudy, with a low around 31.
Sunday
A slight chance of showers. Snow level 6200 feet rising to 6900 feet in the afternoon. Mostly sunny, with a high near 58.
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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 am PDT Apr 13, 2026
6am PDT Apr 13, 2026-6pm PDT Apr 19, 2026
 
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Additional Resources

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