First published 9/18/2026, 10:03:15 PM · Last updated 9/18/2026, 10:03:15 PM

Small Craft Advisory issued September 18 at 2:52PM PDT until September 20 at 3:00AM PDT by NWS San Francisco CA

The National Weather Service in San Francisco issued a Small Craft Advisory on 2026-09-18T21:52:00Z (2:52 PM PDT). The advisory is in effect through 2026-09-20T10:00:00Z (3:00 AM PDT) and targets small vessels operating in waters under the NWS San Francisco forecast area.

Categories: severe-weather-and-natural-disasters, travel-and-transportation

Generated scores

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

Confidence: 9/10How 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: 7/10The 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).
Positivity: 2/10How harmful or beneficial the event is, from strongly harmful (1) to strongly positive (10).
Urgency: 7/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

Why it matters

Small Craft Advisories indicate conditions potentially hazardous to small boats (e.g., strong winds, rough seas). Mariners, commercial operators, and recreational boaters in the San Francisco coastal area should plan accordingly, avoid exposed waters if possible, and check updated forecasts and local marine notices.

Location

Sources

Small Craft Advisory issued September 18 at 2:52PM PDT until September 20 at 3:00AM PDT by NWS San Francisco CA

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