Early Heat Wave in the West; Fire Concerns in the Plains

An anomalously early heat wave will continue to intensify and expand across the West and Southwest as the week progresses. Numerous daily and potentially monthly record highs are expected to be broken. Elevated to critical fire weather conditions are expected today across the High Plains and southern Plains. Lake effect snow downwind of the Great Lakes will taper off today. Read More >

Hazardous Weather Conditions

Current conditions at

Napa, Napa County Airport (KAPC)

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

Clear

52°F

11°C

Humidity 87%
Wind Speed N 0 MPH
Barometer 30.0 in (1015.92 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 17 Mar 03:20 AM PDT
Extended Forecast for

8 Miles WNW Vacaville CA

Heat Advisory March 17, 03:43am until March 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory March 17, 03:43am until March 20, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Overnight

    Low: 68 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 83. North northeast wind 3 to 6 mph.

    High: 83 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 63. Light and variable wind becoming north northwest around 5 mph after midnight.

    Low: 63 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 83. East northeast wind 3 to 6 mph.

    High: 83 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 64. Light and variable wind becoming west northwest around 5 mph after midnight.

    Low: 64 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

Detailed Forecast

Overnight
Clear, with a steady temperature around 68. North wind around 5 mph.
Tuesday
Sunny, with a high near 83. North northeast wind 3 to 6 mph.
Tuesday Night
Clear, with a low around 63. Light and variable wind becoming north northwest around 5 mph after midnight.
Wednesday
Sunny, with a high near 83. East northeast wind 3 to 6 mph.
Wednesday Night
Clear, with a low around 64. Light and variable wind becoming west northwest around 5 mph after midnight.
Thursday
Sunny, with a high near 85.
Thursday Night
Mostly clear, with a low around 66.
Friday
Sunny, with a high near 87.
Friday Night
Mostly clear, with a low around 65.
Saturday
Mostly sunny, with a high near 81.
Saturday Night
Partly cloudy, with a low around 60.
Sunday
Sunny, with a high near 74.
Sunday Night
Partly cloudy, with a low around 56.
Monday
Mostly sunny, with a high near 70.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
8 Miles WNW Vacaville CA
 38.39°N 122.11°W (Elev. 1365 ft)
1:54 am PDT Mar 17, 2026
3am PDT Mar 17, 2026-6pm PDT Mar 23, 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