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June 2018 is Typhoon Preparedness Month

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High Surf Advisory Remains in Effect; Inexperienced Swimmers Advised to Stay Out of the Water

The National Weather Service (NWS) Guam Weather Forecast Office advised a northwest swell is expected to maintain hazardous surf and high rip current risk along west and north facing reefs of the Marianas.

Inexperienced swimmers should remain out of the water due to dangerous conditions.

A high surf advisory remains in effect for Guam, Rota, Tinian, and Saipan until 4 a.m. Wednesday. Large breaking waves of 9 to 10 feet are expected along west and north facing reefs of the Marianas.

GHS/OCD, JRM, NBG, and AAFB to Conduct Routine Testing of Advanced Warning Systems

The Offices of Guam Homeland Security and Civil Defense (GHS/OCD), Joint Region Marianas (JRM), U.S. Naval Base Guam (NBG), and Andersen Air Force Base (AAFB) will conduct routine testing of the vital communication and advance warning system sirens, respectively, on Tuesday, January 3, 2023, starting at 3:15 p.m.

GHS/OCD will test the nineteen (19) All Hazards Alert Warning System (AHAWS) sirens in conjunction with JRM, NBG, and AAFB monthly routine testing of the “Giant Voice (GV)” sirens.

Flood Advisory in Effect; Practice Caution and Remain Out of the Water

The National Weather Service (NWS) Guam Weather Forecast Office issued a flood advisory in effect for Guam until 3:15 p.m. this afternoon. Between 1 and 2 inches of rain has already fallen. Additional rainfall amounts of 1 to 2 inches are expected. Minor flooding in low-lying and poor drainage areas, water on roadways, and overflowing of poor drainage areas are expected.

Some locations that will experience flooding include Ordot-Chalan Pago, Yona, Agana Heights, Asan, Merizo, Piti, and Santa Rita.

High Surf Advisory and High Risk of Rip Currents in Effect; Inexperienced Swimmers Advised to Stay Out of the Water

The National Weather Service (NWS) Guam Weather Forecast Office maintains a high surf advisory in effect for Guam, Rota, Tinian, and Saipan until 6 a.m. Tuesday. Large breaking waves of 7 to 10 feet are expected in the surf zone. Dangerous swimming and surfing conditions and localized beach erosion are expected.

Inexperienced swimmers should remain out of the water due to dangerous surf conditions.

No Immediate Threat to Marianas Assessed from Reported North Korea Launch

The Offices of Guam Homeland Security and Civil Defense (GHS/OCD), in conjunction with the Mariana Regional Fusion Center (MRFC), federal and military partners, continue to monitor events surrounding the region including reports of the recent launch of an unidentified projectile out of the Democratic People’s Republic of Korea (DPRK) today. 

Rainfall Expected in the Coming Days; Watch for Potential Additional Advisories

The National Weather Service (NWS) Guam Weather Forecast Office issued a special weather statement for Guam, Rota, Tinian, and Saipan. An unsettled pattern is expected for the Marianas through Christmas weekend.

A weak tropical disturbance, Invest Area 94W, located southeast of Eauripik, will move northward toward the Marianas, bringing showers and thunderstorms to the region through Friday night. Additionally, a shear line will drift south toward CNMI Friday night and Saturday. A wet unsettled pattern is expected for the Marianas into next week.

High Surf Advisory in Effect; Inexperienced Swimmers Advised to Stay Out of the Water

The National Weather Service (NWS) Guam Weather Forecast Office advised a northwest swell, generated by strong gale-force winds behind a cold front located south of Japan, continues to affect the Marianas.

Inexperienced swimmers should remain out of the water due to dangerous conditions.

A high surf advisory is in effect for Guam, Rota, Tinian, and Saipan until 6 p.m. Thursday. Large breaking waves of 8 to 10 feet are expected along north facing reefs of the Marianas.

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