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Special Marine Warning issued October 20 at 3:01PM AST until October 20 at 4:00PM AST by NWS San Juan PR, United States of America

severe

Severity as published by WMO Alert Hub (national weather services).

Source

WMO Alert Hub (national weather services) — official source

Time

20 October 2026, 19:01 UTC (9 hr ago)

Area

Atlantic Waters of Puerto Rico AND USVI from 10 NM to 19.5N; Coastal Waters of Northern Puerto Rico out 10 NM, United States
18.499, -66.303

What this is

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

What to do

Follow the instructions issued by WMO Alert Hub (national weather services) and your local emergency services. The guidance below is background.

Who to contact

National Weather Service · FEMA · USGS Earthquake Hazards

This site is not an emergency service and does not issue warnings.

Location

No map is loaded here. A map means downloading image tiles from another service, which is the slowest thing on the full page and the first thing to fail on a weak connection. The coordinates are above if you need them.