National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Snow Squalls May Impact the Northeast on Thursday; Dangerously Cold Arctic Air Impact the North-Central US

Snow showers and snow squalls are likely to develop across the Northeast on Thursday. Lake effect snow will persist downwind of the Great Lakes. An arctic blast will bring frigid temperatures, gusty winds and dangerous wind chills to the Northern Plains before expanding to the South and East. A major winter storm will begin impacting the Southern Plains and Lower Mississippi Valley Friday. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

Lat: 38.2075°NLon: 122.27944°WElev: 33.0ft.

haze

48°F

9°C

Humidity 93%
Wind Speed ENE 6 MPH
Barometer 30.05 in (1017.61 mb)
Dewpoint 46°F (8°C)
Visibility 6.00 mi
Wind Chill45°F (7°C)
Last update 21 Jan 05:20 PM PST
Extended Forecast for

Lake Berryessa CA

  • Tonight

    Tonight: Isolated sprinkles between 7pm and 8pm. Cloudy, with a low around 48. Calm wind.

    Low: 48 °F

    Isolated
    Sprinkles

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 63. Calm wind.

    High: 63 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Patchy fog after 4am. Otherwise, partly cloudy, with a low around 44. Calm wind.

    Low: 44 °F

    Mostly Clear
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 9am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 59. Light north wind.

    High: 59 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 46. North wind 3 to 7 mph. Winds could gust as high as 28 mph.

    Low: 46 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 55.

    High: 55 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Isolated sprinkles between 7pm and 8pm. Cloudy, with a low around 48. Calm wind.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 63. Calm wind.
Thursday Night
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 44. Calm wind.
Friday
Patchy fog before 9am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 59. Light north wind.
Friday Night
Mostly clear, with a low around 46. North wind 3 to 7 mph. Winds could gust as high as 28 mph.
Saturday
Sunny, with a high near 59.
Saturday Night
Mostly clear, with a low around 40.
Sunday
Partly sunny, with a high near 55.
Sunday Night
Mostly cloudy, with a low around 41.
Monday
Mostly sunny, with a high near 58.
Monday Night
Partly cloudy, with a low around 41.
Tuesday
Mostly sunny, with a high near 59.
Tuesday Night
A slight chance of rain. Mostly cloudy, with a low around 44.
Wednesday
A chance of rain. Partly sunny, with a high near 57.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lake Berryessa CA
 38.57°N 122.24°W (Elev. 732 ft)
Last Update:
2:22 pm PST Jan 21, 2026
Forecast Valid:
5pm PST Jan 21, 2026-6pm PST Jan 28, 2026
 
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Additional Resources

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