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Coastal Flood Warning

◍ Guam · USA · updated 10/16/2026, 9:26:00 PM

⏱ In effect until 11:00 PM UTC+10

Severity score

65/100

Confidence

High

Why this matters

* WHAT...For the Coastal Flood Warning, significant coastal flooding expected. For the High Surf Warning, dangerously large breaking waves up to 35 feet for Guam, 20 to 25 feet for Rota, and 15 to 20 feet for Tinian and Saipan. * WHERE...Guam, Rota, Tinian and Saipan. * WHEN...From 5 PM this afternoon to 4 AM ChST Monday. * IMPACTS...Numerous roads may be closed. Low-lying property including ho

Key stats

Severity

Severe

Certainty

Likely

Urgency

Expected

Timeline

Coastal Flood Warning
10/16/2026, 9:26:00 PM
Coastal Flood Warning issued October 17 at 7:26AM ChST until October 19 at 4:00AM ChST by NWS Tiyan GU

Sources & attribution

OfficialNWS NWS Tiyan GUupdated 10/16/2026, 9:26:00 PM

OfficialNWS NWS Wakefield VAupdated 10/16/2026, 7:47:00 PM

OfficialNWS NWS Newport/Morehead City NCupdated 10/16/2026, 6:55:00 PM

⚠This is an informational severity score, not an official warning. Follow guidance from NWS/NOAA, FEMA (ready.gov), and local emergency management.