Occurred Oct 21, 2026, 11:53:00 PM UTC

First published Oct 22, 2026, 12:21:15 AM UTC · Last updated Oct 22, 2026, 12:21:15 AM UTC

Thunderstorms and lightning

Special Marine Warning — NWS Los Angeles/Oxnard CA

Original source title

Special Marine Warning issued October 21 at 4:53PM PDT until October 21 at 6:15PM PDT by NWS Los Angeles/Oxnard CA

Reported by U.S. National Weather Service Alerts NWS

Event: Special Marine Warning. Affected area: Point Piedras Blancas to Point Sal westward out to 10 NM; East Santa Barbara Channel from Pt. Conception to Pt. Mugu CA including Santa Cruz Island; Point Piedras Blancas to Point Sal from 10 to 60 NM; Waters from Pt. Sal to Santa Cruz Island CA and westward 60 nm including San Miguel and Santa Rosa Islands; Outer waters from Santa Cruz Island to San Clemente Island to 60 NM offshore including San Nicolas and Santa Barbara Islands. Severity: Severe; urgency: Immediate; certainty: Likely. For the following areas... East Santa Barbara Channel from Pt. Conception to Pt. Mugu CA including Santa Cruz Island... Outer waters from Santa Cruz Island to San Clemente Island to 60 NM offshore including San Nicolas and Santa Barbara Islands... Point Piedras Blancas to Point Sal from 10 to 60 NM... Point Piedras Blancas to Point Sal westward out to 10 NM... Waters from Pt. Sal to Santa Cruz Island CA and westward 60 nm including San Miguel and Santa Rosa Islands... At 452 PM PDT, a severe thunderstorm capable of producing waterspouts was located 16 nm west of Point Arguello, or 24 nm west of Point Conception, moving north at 50 knots. HAZARD...Waterspouts, wind gusts in excess of 50 knots, and small hail. SOURCE...Radar indicated. IMPACT...Waterspouts can easily overturn boats and create locally hazardous seas. Boats could suffer significant structural damage in high winds. Small craft could capsize in suddenly higher waves. Locations impacted

At a glance

Affected location: California coastal waters

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Why it matters

The source says waterspouts could overturn boats and high winds could cause significant structural damage.

Location

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Generated scores

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

Confidence: 8/10How 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: 9/10How 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 4:53PM 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.

Nearby · within 200 km
Special Marine Warning issued October 21 at 6:16PM PDT until October 21 at 8:15PM PDT by NWS Los Angeles/Oxnard CAOct 22, 2026, 1:16 AM UTC
The National Weather Service issued a warning for severe thunderstorms, with wind gusts above 50 knots and small hail, across coastal waters from Point Piedras Blancas to San Clemente Island, California. It was in effect until 8:15 PM PDT.
Nearby · within 200 km
Special Marine Warning issued October 21 at 5:07PM PDT until October 21 at 5:30PM PDT by NWS San Diego CAOct 22, 2026, 12:07 AM UTC
The warning covered offshore waters from San Mateo Point to the Mexican border, including San Clemente Island. A shower capable of producing waterspouts and wind gusts of at least 34 knots was reported; mariners were instructed to move to safe harbor.
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