First published Oct 21, 2026, 11:41:15 PM UTC · Last updated Oct 21, 2026, 11:41:15 PM UTC

Thunderstorms and lightning

Special Marine Warning — NWS Los Angeles/Oxnard CA

Original source title

Special Marine Warning issued October 21 at 4:09PM PDT until October 21 at 6:15PM PDT by NWS Los Angeles/Oxnard CA

Reported by U.S. National Weather Service Alerts NWS

The National Weather Service issued a marine warning for Southern California waters after radar detected a severe thunderstorm west of San Miguel Island. The storm was reported to pose waterspout, strong-wind-gust, and small-hail hazards.

At a glance

Affected location: Southern California coastal waters

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Why it matters

The warning says waterspouts can overturn boats and create locally hazardous seas.

Location

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Generated scores

Scores are based on the cited reporting and use a 1–10 scale. Read the methodology.

Confidence: 7/10How certain the assessment is based on the clarity and evidence in the cited reporting.
Geographic reach: 3/10How widely the event reaches, from a local area (1) to worldwide impact (10).
Global importance: 2/10The event's broader significance, from limited importance (1) to major global importance (10).
Impact magnitude: 4/10The scale or severity of the real-world impact, from minor (1) to extreme (10).
Urgency: 8/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

Primary official sources

U.S. National Weather Service Alerts NWS Special Marine Warning issued October 21 at 4:09PM PDT until October 21 at 6:15PM PDT by NWS Los Angeles/Oxnard CA

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Related developments reported in the last 30 days. These are not necessarily ongoing incidents.

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