According to the National Center for Hydro-Meteorological Forecasting, as of April 15, a weak cold air mass continues to move southward, compressing a low-pressure trough located around 24-26 degrees north latitude.

From the night of April 16 to 17, under the combined influence of this cold air and wind convergence at around 1,500 meters, most northern provinces - excluding Lai Chau and Dien Bien - along with Thanh Hoa, are forecast to see light to moderate rain, with scattered thunderstorms. Rainfall is expected to range between 20-40mm, with localized areas exceeding 100mm. From April 17, temperatures across the north are set to ease, bringing cooler conditions.

In the Central Highlands, scattered showers and thunderstorms are also expected during the late afternoon and evening of April 15, with rainfall between 10-20mm and some areas exceeding 50mm. These storms may be accompanied by dangerous phenomena such as tornado-like gusts, lightning, hail, and strong winds.

Two more waves of rain expected

From April 17 to 25, meteorologists predict two additional widespread rainfall events across northern Vietnam. While daytime conditions may still include sunshine, showers and thunderstorms are likely to develop mainly in the late afternoon and at night.

The first wave is expected between the evenings of April 18 and 20, followed by a second from April 22 to 24. Both periods carry the risk of moderate to heavy rain, along with the potential for strong storms and damaging winds.

In the north-central region, scattered showers and thunderstorms are forecast during evenings and nights, while daytime conditions remain sunny, with some areas continuing to experience heat. Similar rain patterns may occur during April 18-20 and again from April 22-24, with localized heavy rainfall possible.

Meanwhile, from Nghe An to Dak Lak, heatwaves are expected to persist, with some areas experiencing extreme temperatures. Showers and thunderstorms may still occur in the evenings and at night.

From April 17 onward, areas from Hue to Da Nang, as well as eastern parts of provinces from Quang Ngai to Dak Lak, are forecast to see continued heat, with some locations facing severe conditions.

Other regions are expected to have isolated showers and thunderstorms in the evenings and at night. The Central Highlands may experience more frequent scattered storms during this time, while daytime conditions remain sunny, with localized heat.

Meteorological experts note that this period marks a seasonal transition across northern Vietnam, the Central Highlands, and southern regions. As a result, people are urged to remain vigilant against hazardous weather phenomena associated with post-heat thunderstorms, including lightning, hail, and strong gusts.

During thunderstorms, residents are advised to limit outdoor activities unless absolutely necessary to reduce risks from lightning strikes, falling trees, collapsing billboards, and strong winds. Those already outdoors should seek safe shelter promptly and avoid standing under large trees, near power poles, or in open areas.

Bao Anh