* WHAT...Large breaking waves of 10 to 14 feet and dangerous rip currents expected.
* WHERE...North and east facing reefs of Guam and Rota.
* WHEN...From 2 AM Friday to 4 PM ChST Saturday.
* IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion. 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 hazardous 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.