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

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Hazardous Weather Conditions

Current conditions at

Arcata / Eureka, Arcata Airport (KACV)

Lat: 40.97806°NLon: 124.10861°WElev: 217.0ft.

Mostly Cloudy

48°F

9°C

Humidity 81%
Wind Speed ESE 14 MPH
Barometer 29.63 in (1003.39 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 25 Dec 01:35 PM PST
Extended Forecast for

Arcata/Eureka Airport CA

Flood Watch December 25, 01:54pm until December 26, 10:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch December 25, 01:54pm until December 26, 10:00pm

    NOW until 10:00pm Fri

    Flood Watch

  • Christmas Day

    High: 54 °F

    Showers and
    Windy

  • Tonight

    Tonight: Showers before 10pm, then showers and possibly a thunderstorm between 10pm and 1am, then showers after 1am. Low around 42. Breezy, with a south southeast wind 16 to 20 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 42 °F

    Showers and
    Breezy

  • Friday

    Friday: Showers. High near 52. Breezy, with a south southeast wind around 16 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 52 °F

    Showers and
    Breezy

  • Friday Night

    Friday Night: Showers, mainly before 10pm. Low around 38. North wind 8 to 11 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 38 °F

    Showers then
    Chance
    Showers

  • Saturday

    Saturday: A 30 percent chance of showers before 10am. Mostly sunny, with a high near 50. North wind 6 to 10 mph.

    High: 50 °F

    Chance
    Showers then
    Sunny

  • Saturday Night

    Saturday Night: Areas of frost after 1am. Otherwise, mostly cloudy, with a low around 34. Northeast wind 6 to 9 mph.

    Low: 34 °F

    Partly Cloudy
    then Areas
    Frost

  • Sunday

    Sunday: Areas of frost before 10am. Otherwise, mostly sunny, with a high near 52.

    High: 52 °F

    Areas Frost
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

Detailed Forecast

Christmas Day
Showers and possibly a thunderstorm before 4pm, then showers likely. High near 54. Windy, with a south wind around 23 mph, with gusts as high as 38 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers before 10pm, then showers and possibly a thunderstorm between 10pm and 1am, then showers after 1am. Low around 42. Breezy, with a south southeast wind 16 to 20 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Friday
Showers. High near 52. Breezy, with a south southeast wind around 16 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
Showers, mainly before 10pm. Low around 38. North wind 8 to 11 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A 30 percent chance of showers before 10am. Mostly sunny, with a high near 50. North wind 6 to 10 mph.
Saturday Night
Areas of frost after 1am. Otherwise, mostly cloudy, with a low around 34. Northeast wind 6 to 9 mph.
Sunday
Areas of frost before 10am. Otherwise, mostly sunny, with a high near 52.
Sunday Night
Partly cloudy, with a low around 37.
Monday
Sunny, with a high near 55.
Monday Night
Partly cloudy, with a low around 39.
Tuesday
Mostly sunny, with a high near 56.
Tuesday Night
Patchy fog. Otherwise, partly cloudy, with a low around 40.
Wednesday
Partly sunny, with a high near 56.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Arcata/Eureka Airport CA
 40.97°N 124.1°W (Elev. 197 ft)
Last Update:
1:10 pm PST Dec 25, 2025
Forecast Valid:
1pm PST Dec 25, 2025-6pm PST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation