Tropical Storm Hagibis Continues to Strengthen; Make Preparations in Advance

Tropical Storm Hagibis Continues to Strengthen; Make Preparations in Advance

The National Weather Service (NWS), Guam Weather Forecast Office continue to monitor what is now Tropical Storm Hagibis.

As of 1 p.m., Hagibis was located 15.0 degrees north latitude and 155.0 degrees east longitude, about 620 miles east of Saipan and 695 miles east of Guam. Tropical Storm Hagibis is moving west at 21 mph with maximum sustained winds of 50 mph. Hagibis is forecast to intensify tonight, possibly becoming a typhoon early Monday morning. On its current track, it is expected to pass near Anatahan Monday night.

A typhoon watch is now in effect for Tinian, Saipan, Alamagan, and Pagan Islands, meaning typhoon conditions, including destructive winds of 74 mph or more, are possible within 48 hours, around Monday afternoon.  

A tropical storm warning is now in effect for Rota, Tinian, Saipan, Alamagan, Pagan, and Agrihan Islands meaning tropical storm conditions, including damaging winds of 39 mph or more, are expected within 24 hours, around Monday afternoon.

Although there are no watches in effect for Guam at this time, any small shift of the system’s track could bring tropical storm force winds of 39 mph or more to Guam.

While heaviest showers are expected to stay north of Guam, up to 2 to 4 inches of rain are possible through Tuesday. More rain will be expected if there is a southward shift in the storm’s track. Such rain, especially in short duration will cause localized flooding at times. In addition, seas will steadily build to hazardous levels of 8 to 11 feet by Tuesday morning with surf becoming hazardous as early as Monday night.

 The Offices of Guam Homeland Security and Civil Defense (GHS/OCD) remind the community to prepare for any scenario by taking basic precautionary actions now: 
·  Stay up to date with the latest information. The storm track or intensity may change and advisories may be issued. 

·  Locate or prepare your emergency preparedness kits for your household; stock up on non-perishable food items and water for your household, flashlights, first-aid kits, batteries, matches or lighters, portable stove, toiletries, etc. Visit for more information on what to include in your supplies list.  

·  Secure important documents such as birth certificates, tax papers, and insurance documents and keep copies in a water-proof bag. 

·  Clear loose debris around your yard and store any items that may become airborne with heavy winds.

·  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.

Stay up to date with the latest advisory information:  

·  NWS Website:

·  NWS Facebook:

·  GHS/OCD Website:

·  GHS/OCD Facebook:

For more information, contact GHS/OCD Public Information Officer, Jenna G. Blas at (671) 489-2540 or via email at


Join the GHS/OCD Email List


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June 2018 is Typhoon Preparedness Month