First published 9/19/2026, 3:58:15 AM · Last updated 9/27/2026, 6:48:30 PM

Small Craft Advisory near San Francisco issued by NWS San Francisco CA

National Weather Service issued a Small Craft Advisory beginning September 18 at 8:35 PM PDT (2026-09-19T03:35:00Z) and continuing until September 20 at 3:00 AM PDT for waters monitored by NWS San Francisco, advising hazardous conditions for small vessels.

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: 5/10The 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: 7/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

Why it matters

Small craft advisories warn of hazardous wind and wave conditions that can endanger small boats and nearshore marine activities. Mariners, ferry operators, and coastal recreational users should exercise caution or avoid going out while the advisory is in effect.

Location

Sources

Small Craft Advisory issued September 18 at 8:35PM PDT until September 20 at 3:00AM PDT by NWS San Francisco CA

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