Tropical storm Koguma weakened into a tropical depression on Sunday morning, hours after striking Vietnam’s region from the northern province of Thai Binh to north-central Nghe An Province, the national weather agency has reported.

After making landfall at around 3:00 am on Sunday, the storm was located in the north-central province of Thanh Hoa at 7:00 am, with winds of up to 60 kilometers per hour, and began to be downgraded to a tropical depression, the National Center for Hydro-meteorological Forecasting said.

The depression would become weaker and continue moving west before reaching the border with Laos at 1:00 pm on the same day, the agency forecast.

As impacted by Koguma, the area from Thanh Hoa to Quang Binh Provinces suffered downpours with rainfall ranging between 120 and 280 millimeters during 24 hours from 7:00 am Saturday.

The Gulf of Tonkin, including Vietnam’s Bach Long Vi Island, had rough seas with strong winds of up to 88 kilometers per hour and high waves reaching three meters from Sunday morning.

Simultaneously, winds on the mainland reached a speed of 49 kilometers per hour in the northern delta and Thanh Hoa, and up to 88 kilometers in coastal areas.

The center also forecast moderate to heavy rain, with maximum precipitation of 120 millimeters, for the northern delta and the provinces from Thanh Hoa to Ha Tinh on Sunday.

From Sunday afternoon to Monday morning, the northwest region will have torrents with rainfall of up to over 120 millimeters.

Koguma is the second storm to have struck the East Vietnam Sea in the year to date, after Choi-wan, which made landfall in Taiwan on June 4.

It is forecast that up to 14 storms and tropical depressions will appear in this sea area this year, of which five or six will directly affect Vietnam, the center said.

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