Tracking a Winter Storm; Unusual Early-Season Heat Wave in the Southwest

A major winter storm will organize across the Northern Plains today and then rapidly strengthen as it moves into the Great Lakes on Sunday. Heavy snow and blowing snow are likely to persist over the Great Lakes into Monday night. Dry and gusty winds will produce a critical fire risk across the central/southern Plains. An early heatwave will begin to intensify over the western U.S. into next week. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

54°F

12°C

Humidity 87%
Wind Speed N 3 MPH
Barometer 30.1 in (1019.3 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 15 Mar 01:00 AM PDT
Extended Forecast for

7 Miles SSE Lake Berryessa CA

Heat Advisory March 16, 10:00am until March 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  • Overnight

    Overnight: Clear, with a steady temperature around 56. North northwest wind 6 to 8 mph, with gusts as high as 21 mph.

    Low: 56 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 82. North wind around 9 mph, with gusts as high as 23 mph.

    High: 82 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 56. North northwest wind around 6 mph becoming calm  in the evening.

    Low: 56 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 86. Calm wind becoming north around 5 mph in the afternoon.

    High: 86 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 58. Calm wind.

    Low: 58 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a steady temperature around 56. North northwest wind 6 to 8 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 82. North wind around 9 mph, with gusts as high as 23 mph.
Sunday Night
Partly cloudy, with a low around 56. North northwest wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 86. Calm wind becoming north around 5 mph in the afternoon.
Monday Night
Clear, with a low around 58. Calm wind.
Tuesday
Sunny, with a high near 87.
Tuesday Night
Mostly clear, with a low around 59.
Wednesday
Sunny, with a high near 88.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
Sunny, with a high near 90.
Thursday Night
Mostly clear, with a low around 61.
Friday
Sunny, with a high near 90.
Friday Night
Partly cloudy, with a low around 61.
Saturday
Sunny, with a high near 84.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
7 Miles SSE Lake Berryessa CA
 38.48°N 122.22°W (Elev. 1798 ft)
1:26 pm PDT Mar 14, 2026
1am PDT Mar 15, 2026-6pm PDT Mar 21, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database