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

Small Craft Advisory — NWS San Francisco CA (Sep 18 14:52 PDT to Sep 19 03:00 PDT)

The National Weather Service San Francisco issued a Small Craft Advisory on Sep 18 at 2:52 PM PDT, in effect until Sep 19 at 3:00 AM PDT. The advisory notifies mariners that conditions are hazardous for small vessels along the San Francisco area waters.

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

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: 6/10The event's broader significance, from limited importance (1) to major global importance (10).
Impact magnitude: 3/10The 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: 6/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

Why it matters

Small Craft Advisories indicate marine conditions that can endanger small boats and recreational maritime activities. Mariners, ferry operators, and coastal travelers should avoid or take precautions during the advisory period.

Location

Sources

Small Craft Advisory issued September 18 at 2:52PM PDT until September 19 at 3:00AM PDT by NWS San Francisco CA

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