Moderate Hazardous Seas Warning | Effective 07/06/2026 23:59

Headline: 
Hazardous Seas Warning issued July 7 at 4:59PM ChST until July 9 at 5:00AM ChST by NWS Tiyan GU
Event: 
Hazardous Seas Warning
Urgency: 
Expected
Effective: 
July 6, 2026 - 11:59pm
Expires: 
July 7, 2026 - 3:00pm
Description: 
* WHAT...Very steep and hazardous seas 14 to 18 feet. * WHERE...Marianas Coastal Waters. * WHEN...Until 5 AM ChST Thursday. * IMPACTS...Very steep and hazardous seas could capsize or cause damage to vessels. * ADDITIONAL DETAILS...As Typhoon Bavi continues to move west- northwest and away from the Marianas, conditions will gradually improve in the coming days. For small craft operations, dangerous marine conditions still persist through at least Wednesday night.
Instruction: 
A hazardous seas warning means hazardous sea conditions are imminent or occurring. Recreational boaters should remain in port...or take shelter until waves subside. Commercial vessels should prepare for rough seas and consider remaining in port or taking shelter in port until hazardous seas subside.
Area Description: 
Guam Coastal Waters; Rota Coastal Waters; Tinian Coastal Waters; Saipan Coastal Waters
Forcast Office: 
NWS Tiyan GU