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June 2018 is Typhoon Preparedness Month

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Flood Advisory Extended; Practice Caution in Heavy Rain

The National Weather Service (NWS) Guam Weather Forecast Office issued a flood advisory, in effect for Guam until 2:45 p.m. Urban and small stream flooding caused by excessive rainfall is expected. Additional rainfall amounts of 2 to 4 inches are expected, resulting in minor flooding.

Some locations that will experience flooding include Dededo, Tamuning, Yigo, Mangilao, Chalan Pago-Ordot, Barrigada, Yona, Hagatna Heights, Andersen AFB, Mongmong-Toto-Maite, Sinajana, Asan, and Piti.

Residents and visitors are advised to take the following precautionary actions:

    Flood Advisory in Effect; Practice Caution in Heavy Rain

    The National Weather Service (NWS) Guam Weather Forecast Office issued a flood advisory, in effect for Guam until 11:30 a.m. Flooding caused by excessive rainfall is expected. Between 0.5 and 1.5 inches of rain has already fallen. Additional rainfall amounts of 0.75 to 1.5 inches are expected, resulting in minor flooding.

    Some locations that will experience flooding include Dededo, Tamuning, Yigo, Mangilao, Chalan Pago-Ordot, Barrigada, Yona, Hagatna Heights, Andersen AFB, Mongmong-Toto-Maite, Sinajana, Asan, Piti, and Santa Rita.

    Hazardous Surf and Seas Remain; Stay Out of the Water

    The National Weather Service (NWS) Guam Weather Forecast Office has the following advisories in effect:

    Remain out of the water due to life-threatening surf conditions.

    A high surf warning is in effect for Guam, Rota, Tinian, and Saipan until 6 p.m. this evening along north facing reefs. Dangerously large breaking waves of 11 to 15 feet are expected. Breaking waves can sweep people off jetties and docks, and into dangerous seas.

    Hazardous Surf and Seas Remain; Inexperienced Swimmers Advised to Stay Out of the Water

    The National Weather Service (NWS) Guam Weather Forecast Office has the following advisories in effect:

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

    A high surf advisory remains in effect for Guam, Rota, Tinian, and Saipan until 6 p.m. Sunday along north and east facing reefs. Large breaking, dangerous swimming and surfing conditions and localized beach erosion are expected.

    Flash Flood Warning Extended; Practice Caution in Heavy Rain

    The National Weather Service (NWS), Weather Forecast Office Guam has issued a flash flood warning for Northeastern Guam until 1:15 p.m. this afternoon. Between 1 and 3 inches of rain has fallen. Additional rainfall amounts of 1 to 3 inches is possible. Flash flooding is ongoing or expected to begin shortly. 

    Some locations that will experience flash flooding include Dededo, Tamuning, Yigo, Mangilao, Chalan Pago-Ordot, Barrigada, Hagatna Heights, Andersen AFB, Mongmong-Toto-Maite, Sinajana, and Asan.

    Flood Advisory in Effect; Practice Caution in Heavy Rain

    The National Weather Service (NWS) Guam Weather Forecast Office issued a flood advisory, in effect for Guam until 12:45 p.m. Urban and small stream flooding caused by excessive rainfall is expected. Additional rainfall amounts of 1 to 2 inches are expected, resulting in minor flooding.

    Residents and visitors are advised to take the following precautionary actions:
    • If driving, be alert for low visibilities and slippery roads in heavy rain;
    • Slow down where water is ponding on the road;

    No Tsunami Threat to Marianas from Indonesia Earthquake

    The U.S. Geological Survey recorded an earthquake with a preliminary magnitude of 7.6 that occurred near Kepulauan Tanimbar, Indonesia, with a depth of 95.2 km, at 3:47 a.m. (ChST).

    As advised by the Pacific Tsunami Warning Center, there is no tsunami threat to Guam or the Northern Mariana Islands at this time.

    This will be the final statement issued by GHS/OCD unless additional information is received.

    Strong Thunderstorms Over Waters; Mariners Advised to Practice Caution

    The National Weather Service (NWS) Guam Weather Forecast Office advised strong thunderstorms are over the coastal waters of Guam and Rota.

    The strong thunderstorms are capable of producing winds to around 30 knots. These thunderstorms were located along a line extending from 32 NM east of Ritidian buoy to near Cocos Island, moving west at 15 knots.

    Mariners can expect gusty winds to around 30 knots, potential waterspouts, locally higher waves, and lightning strikes. Boaters should seek harbor until these storms pass.

    Flash Flood Warning Now in Effect for Northeastern Guam; Practice Caution in Heavy Rain

    The National Weather Service (NWS) in Tiyan Guam has issued a flash flood warning for Northeastern Guam until 6 p.m. this afternoon. Thunderstorms are producing heavy rain. Additional rainfall amounts of 1 to 3 inches is possible. Flash flooding is ongoing or expected to begin shortly. 

    Some locations that will experience flash flooding include Dededo, Tamuning, Yigo, Mangilao, Barrigada, Hagatna Heights, and Mongmong-Toto-Maite. 

    Residents and visitors are advised to take the following precautionary actions:

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