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High Surf Warning issued October 29 at 3:00PM ChST until October 30 at 4:00PM ChST by NWS Tiyan GU, United States of America
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* WHAT...For the High Surf Warning, dangerously large breaking waves
of 12 to 18 feet expected. For the High Surf Advisory, large
breaking waves of 7 to 10 feet expected in the surf zone. For the
Coastal Flood Statement, isolated minor coastal flooding up to 1
foot expected. For the High Rip Current Risk, dangerous rip
currents expected.
* WHERE...North and east facing reefs of Tinian and Saipan.
* WHEN...For the High Surf Warning and Coastal Flood Statement, from
1 AM to 4 PM ChST Friday. For the High Surf Advisory, from 4 PM
Friday to 4 PM ChST Saturday. For the High Rip Current Risk, from
late tonight through Saturday afternoon.
* IMPACTS...Some water on low lying roads and property. Breaking
waves can sweep people off jetties and docks, and into dangerous
seas. Life-threatening swimming conditions and significant beach
erosion can be expected. Rip currents can sweep even the best
swimmers away from shore into deeper water.
* ADDITIONAL DETAILS...As TY In-fa moves west-northwest toward the
far northern CNMI, seas are expected to rapidly increase due to the
large, long-period northeast swell emanating from In-fa. This will
produce dangerous surf along north and east facing reefs after
midnight tonight. As In-fa progresses, swell will become north,
then northwest, resulting in surf building over west facing reefs
Friday night. Surf will remain hazardous through Saturday
afternoon. These surf conditions will maintain a high risk of
dangerous rip currents.
Measurements
| Coordinates | 39.9645, -100.8105 |
|---|---|
| Region | Tinian; Saipan |
| Location Precision | country |
| Issuing Authority | United States of America — us-noaa-nws-en |
| Cap Urgency | Expected |
| Cap Certainty | Likely |
| Cap Expires | 2026-10-30T05:00:00+10:00 |
Official source
Warnings courtesy of the issuing national meteorological service, via the WMO Alert Hub.
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 WMO Alert Hub (national weather services).
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Source updated 1 hour ago (Oct 29, 2026 05:01 UTC) · we last heard from WMO Alert Hub (national weather services) 25 seconds ago
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About this location
The agency did not publish coordinates for this warning. The pin is the centre of the country, not the location of the event — read the area name, not the map, for where it applies.
Area as the agency stated it: Tinian; Saipan
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