Officials Monitor Circulation Near Chuuk; Expect Rains, Winds, and Hazardous Seas by Sunday


Officials Monitor Circulation Near Chuuk; Expect Rains, Winds, and Hazardous Seas by Sunday

The National Weather Service (NWS) Guam Weather Forecast Office continues to monitor all activity in the region, including a pair of circulations near and southwest of Chuuk.

The first, JTWC Invest Area 95W, is centered near 4 degrees north latitude and 145 degrees east longitude. A second circulation, JTWC Invest Area 96W, is found closer to Chuuk Lagoon near 6 degrees north latitude and 151 degrees east longitude. Neither system is expected to amount to much in the next 24 hours, however, they are expected to merge southwest of Chuuk tonight or Saturday, then begin to head west Saturday night or Sunday. Current forecasts show this circulation then passing Yap Island Monday or Tuesday.

At this time, there remains uncertainty as to the exact intensity by the time the system passes Yap Island. Various model outlooks range from a weak circulation to a tropical depression or storm. Heavy rain, stronger winds and increasing seas are expected across Yap State between Sunday and Tuesday. 

For Guam, Saturday will be dry with mostly sunny skies. Saturday night and Sunday, a shear line will drop southward over the CNMI bringing an increase in showers while also creating windy conditions with gusts up to 30 mph possible on Monday. Conditions are expected to dry out Monday and Tuesday, but winds will be slower to subside. Seas and surf will also increase beginning Saturday night and could become hazardous Sunday into Monday. 

The community is advised to prepare for winds and rain Sunday and Monday. Those living in areas prone to flooding should be prepared to take action; clear drainage areas and unblock clogged storm drains in your area to minimize the chance of flooding. In inclement weather, do not camp, park, or hike along streams, rivers, and creeks during heavy rainfall. These areas can flood quickly and with little warning. 

high risk of rip currents remains in effect for Guam, Rota, Tinian, and Saipan through Tuesday afternoon. Dangerous rip currents are expected along east facing reefs of the Marianas. Rip currents can sweep even the best swimmers away from the shore into deeper water. Inexperienced swimmers should remain out of the water due to dangerous surf conditions. If caught in a rip current, do not swim against the current. Swim in a direction following the shoreline, face the shore and call or wave for help.

The Offices of Guam Homeland Security and Civil Defense (GHS/OCD) remind the community to avoid hazardous rip currents until conditions subside. Prepare for winds and rain by Sunday and Monday.

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



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June 2018 is Typhoon Preparedness Month