Alert archive / California / Hazardous Seas Warnings in 2025

Hazardous Seas Warning 31, NWS Eureka, CA

September 18, 2025

NWS Eureka, CA issued this hazardous seas warning at Sep 18, 2025, 10:03 PM PDT. It took effect at Sep 19, 2025, 3:00 AM PDT. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 18, 2025, 10:03 PM PDT (05:03 UTC)
In effect from
Sep 19, 2025, 3:00 AM PDT
Expired
Sep 19, 2025, 11:00 AM PDT
In force
8 hr
Issued by
NWS Eureka, CA

What forecasters said that day

The local office's own words before this hazardous seas warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Eureka, CA wrote its last area forecast discussion before this hazardous seas warning went out at Sep 18, 2:35 PM PDT, 7 hours 28 minutes earlier.

Area forecast discussion, Sep 18, 2:35 PM PDT, 7 hours 28 minutes before
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In the hours before

Special weather statement, Sep 18, 4:03 PM PDT, 6 hours before
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Special weather statement, Sep 18, 4:32 PM PDT, 5 hours 31 minutes before
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Special weather statement, Sep 18, 4:39 PM PDT, 5 hours 24 minutes before
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Special weather statement, Sep 18, 4:41 PM PDT, 5 hours 22 minutes before
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Special weather statement, Sep 18, 7:42 PM PDT, 2 hours 21 minutes before
Special Weather Statement
National Weather Service Eureka CA
742 PM PDT Thu Sep 18 2025

CAZ110-111-113-114-190315-
Southeastern Mendocino Interior CA-Northwestern Mendocino
Interior CA-Northeastern Mendocino Interior CA-Northern Lake CA-
742 PM PDT Thu Sep 18 2025

...A STRONG THUNDERSTORM WILL IMPACT EAST CENTRAL MENDOCINO AND
NORTHWESTERN LAKE COUNTIES UNTIL 815 PM PDT...

At 742 PM PDT, Doppler radar was tracking a strong thunderstorm 15
miles northeast of Potter Valley, or 22 miles north of Upper Lake,
moving northwest at 15 mph.

HAZARD...Pea size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to outdoor objects is possible.

Locations impacted include...
  Potter Valley and Gravelly Valley Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

Torrential rainfall is also occurring with this storm and may lead
to flash flooding. Do not drive your vehicle through flooded
roadways.

Persons in campgrounds should consider seeking sturdy shelter until
this storm passes.

&&

LAT...LON 3936 12325 3939 12333 3970 12310 3952 12280
      3924 12290
TIME...MOT...LOC 0241Z 117DEG 13KT 3946 12291

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...<30 MPH

DB

The office that day

Everything else NWS Eureka, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 18, 7:42 PM PDTSpecial Weather StatementEKAMendocino33 min
Sep 19, 1:18 AM PDTSpecial Weather StatementEKA27 min
Sep 19, 1:50 AM PDTSpecial Weather StatementEKA25 min
Sep 19, 2:33 AM PDTSpecial Weather StatementEKAHumboldt27 min
Sep 19, 3:25 AM PDTSmall Craft AdvisoryEKA20 hr

Nearby

Hazardous Seas Warnings in California, 2025Every hazardous seas warning in 2025

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.