Rip Currents are Life Threatening; NWS Advisories in Effect
The National Weather Service (NWS), Guam Weather Forecast Office continue to monitor a circulation, now called Tropical Depression 17, that is expected to pass well northeast of Saipan tonight but the clouds and rain are west and southwest of the center, dragging heavy rain across the Marianas through Monday morning. The following advisories remain in effect for the Marianas:
A flash flood watch is in effect for Guam, Rota, Tinian, and Saipan through Monday afternoon, meaning conditions may develop that lead to flash flooding. Heavy rain is expected from the developing tropical disturbance. Rainfall of 4 to 8 inches is possible through Monday morning. Dangerous flash flooding is possible.
A high surf advisory is in effect for Guam, Rota, Tinian, and Saipan through Tuesday night, meaning high surf will affect beaches in the advisory area, producing localized beach erosion and dangerous conditions for swimmers and beach goers. Hazardous surf of 10 to 12 feet along west facing reefs and 8 to 10 feet along south facing reefs is expected.
A high risk of rip currents is in effect for Guam, Rota, Tinian, and Saipan through Tuesday night. Rip currents are powerful channels of water flowing quickly away from shore. Dangerous rip currents are expected along south and west facing reefs. If caught in a rip current, yell for help. Remain calm and stay afloat while waiting for help. If swimming out of a rip current, swim parallel to shore and back toward the beach when possible. Do not attempt to swim directly against a rip current. Rip currents are life threatening.
A small craft advisory remains in effect for Guam, Rota, Tinian, and Saipan coastal waters through Monday. West winds of 15 to 25 knots and combined seas of 9 to 11 feet will produce hazardous conditions for operators of small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid sailing in these conditions.
A thunderstorm warning is in effect for the Guam International Airport Authority until 8:30 a.m. this morning. Thunderstorms are occurring within 5 nautical miles of the airport. If lightning is seen or thunder is heard, seek shelter indoors.
The Offices of Guam Homeland Security and Civil Defense (GHS/OCD) advise residents and visitors to avoid hazardous seas, especially south and west facing reefs and beaches, until conditions subside. Heed the advice of lifeguards, beach patrol flags, and signs.