Guam – The National Weather Service has issued both a High Surf and a Small Craft Advisory for the Marianas. They will remain in effect through Wednesday at 4 pm.
The NWS reports that building trade-winds are generating swells and wind waves that will create hazardous surf along east facing reefs of Guam, Rota, Tinian and Saipan by this afternoon.
The NWS predicts that surf along east facing reefs will rise today [Tuesday] and reach hazardous levels of 9 to 12 feet by this afternoon.
The surf will then peak near 12 feet through Wednesday morning, before gradually subsiding below advisory levels on Wednesday afternoon.
The NWS advises residents to avoid venturing near exposed reefs and beaches, especially those along east facing reefs, because the high surf will generate rip currents which can sweep you out to sea and lead to your death.
In addition the NWS has issued a Small Craft Advisory for rough seas, also being blamed on strong trade winds that are generating large trade-wind waves and swells.
The Small Craft Advisory is now in effect and will remain in effect until at least 4 pm Wednesday.
A Small Craft Advisory means that seas 10 feet or greater and sustained winds of 22 to 33 knots are expected to produce conditions hazardous to small craft.
* Easterly winds will increase to 20 to 25 knots this afternoon. Winds will remain at this strength through at least Wednesday afternoon.
* Seas of 8 to 9 feet Tuesday morning should increase throughout the day reaching peaks of 10 to 11 feet by tomorrow, Wednesday. The
elevated seas are expected to persist through at least Wednesday.
Inexperienced Mariners, especially those operating smaller vessels, should avoid boating in these conditions.
If travel by boat is necessary, exercise caution, especially near reef lines and when entering or leaving harbors and inlets.