Severe Severe Storm ● Active

Special Marine Warning — Guam Coastal Waters

Event time: Oct 18, 2026 23:47 UTC Last updated: 21 hr ago United States

Icon = what happened · ring colour = how serious: Extreme Severe Moderate Minor

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Special Marine Warning issued October 19 at 9:47AM ChST until October 19 at 10:30AM ChST by NWS Tiyan GU

Measurements

Coordinates	13.5850, 144.8121
Region	Guam Coastal Waters
Nws Urgency	Immediate
Nws Certainty	Likely
Expires	2026-10-19T10:30:00+10:00

Official source

Weather alert data courtesy of NOAA / National Weather Service

This is an official warning issued by the authority named above. Follow its instructions and those of your local emergency services.

Severity as published by US National Weather Service.

View original report

Also reported by: WMO WMO WMO

This event as JSON · API and licence

Source updated 21 hours ago (Oct 19, 2026 00:29 UTC) · we last heard from US National Weather Service 7 seconds ago

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Earlier severe storm events in United States

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Nearby & related events

Special Weather Statement issued October 19 at 12:01PM ChST by NWS Tiyan GU, United States of America Moderate Extreme Weather United States active via WMO 19 hr ago Special Marine Warning — Guam Coastal Waters; Rota Coastal Waters Severe Severe Storm United States active via NWS 19 hr ago Special Marine Warning — Guam Coastal Waters; Rota Coastal Waters Severe Severe Storm United States active via NWS 20 hr ago Special Marine Warning — Guam Coastal Waters; Rota Coastal Waters Severe Severe Storm United States active via NWS 20 hr ago Special Weather Statement issued October 19 at 10:34AM ChST by NWS Tiyan GU, United States of America Moderate Extreme Weather United States active via WMO 20 hr ago

Disclaimer: figures are automatic feeds from the named agencies and may be revised. Do not use this page for life-safety decisions — follow official local emergency services.