First published Oct 16, 2026, 9:52:15 PM UTC · Last updated Oct 16, 2026, 9:52:15 PM UTC

Coastal Flood Warning for Guam, Rota, Tinian and Saipan

The warning forecasts coastal flooding and dangerously large surf across Guam, Rota, Tinian and Saipan through 4 AM ChST on October 19. It advises everyone to stay out of the water and away from the coast.

Why it matters

The source warns of life-threatening surf and possible inundation of homes, businesses, infrastructure and roads.

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: 7/10How 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: 3/10The event's broader significance, from limited importance (1) to major global importance (10).
Impact magnitude: 5/10The scale or severity of the real-world impact, from minor (1) to extreme (10).
Positivity: 1/10How harmful or beneficial the event is, from strongly harmful (1) to strongly positive (10).
Urgency: 8/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

Primary official sources

U.S. National Weather Service Alerts NWS Coastal Flood Warning issued October 17 at 7:26AM ChST until October 19 at 4:00AM ChST by NWS Tiyan GU

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