Flood Watch and Small Craft Advisory in Effect Sunday; Prepare for Locally Heavy Showers


Flood Watch and Small Craft Advisory in Effect Sunday; Prepare for Locally Heavy Showers

The National Weather Service (NWS) Guam Weather Forecast Office issued a flood watch, in effect for Guam, Rota, Tinian, Saipan from Sunday through Sunday night.

Flash flooding caused by excessive rainfall is possible, resulting in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. Locally heavy showers associated with a tropical disturbance, known as Invest 96W, may produce flash floods, especially in hilly terrain. The disturbance is expected to pass just south of Guam the next few days. 96W and a corresponding surface trough are expected to bring numerous locally heavy showers and isolated thunderstorms Sunday and Sunday night.

Take the following precautionary actions:
  • Clear drainage areas and unblock clogged storm drains;
  • Stay up to date with the latest information;
  • If driving in heavy rain, be alert for low visibilities and slippery roads;
  • Slow down where water is ponding on the road;
  • Turn Around, Don’t Drown. Avoid walking or driving through flood waters. Just 6 inches of moving water can knock you down, and 2 feet of water can sweep your vehicle away;
  • Do not camp, park, or hike along streams, rivers, and creeks during heavy rainfall. These areas can flood quickly and with little warning.

A small craft advisory will be in effect for the coastal waters of Guam, Rota, Tinian, and Saipan from 6 a.m. Sunday to 6 p.m. Sunday. South to southwest winds of 15 to 25 knots, with gusts to 30 knots, are expected. Inexperienced mariners, especially those operating small craft, should avoid sailing in these conditions.

The Offices of Guam Homeland Security and Civil Defense (GHS/OCD) advise the community to practice caution while traveling in heavy rain, driving below the speed limit and allowing enough braking distance between vehicles.

Visit the following links for the latest advisory information:
For more information, contact GHS/OCD Public Information Officer Jenna G. Blas at (671) 489-2540 or via email at jenna.g.blas@ghs.guam.gov.             



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June 2018 is Typhoon Preparedness Month