First published Oct 18, 2026, 8:48:15 AM UTC · Last updated Oct 18, 2026, 8:48:15 AM UTC

Special Marine Warning issued October 18 at 6:34PM ChST until October 18 at 7:00PM ChST by NWS Tiyan GU

NWS Tiyan Guam issued a Special Marine Warning for Guam Coastal Waters from 6:34 PM to 7:00 PM ChST on October 18. The warning reported a shower moving northwest over northern Guam waters, with wind gusts of at least 34 knots.

Why it matters

The warning advises seeking safe harbor immediately because waterspouts can overturn boats and create hazardous seas.

Location

Categories: severe-weather-and-natural-disasters

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: 1/10How 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: 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: 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 18 at 6:34PM ChST until October 18 at 7:00PM ChST by NWS Tiyan GU

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