Guam, Northern Mariana Islands Coastal Flood Warning | Effective 04/13/2026 23:26
Public safety alert, emergency alert, and weather alert
Description:
* WHAT...For the High Surf Warning, dangerously large breaking
waves of 13 to 18 feet for Guam and 15 to 20 ft for Rota and 20
to 30 ft at Tinian and Saipan. For the Coastal Flood Warning,
significant coastal flooding 1 to 3 ft for Guam, and 3 to 5 ft
for Rota and 5 to 8 feet, potentially reaching up to 10 to 15
feet, for Tinian and Saipan.
* WHERE...North, east, west, and south facing reefs and
shorelines of the Marianas.