According to the National Center for Hydro-Meteorological Forecasting, weather conditions in northern Vietnam will remain complex as heat temporarily eases under the influence of thunderstorms developing in mountainous areas due to a wind convergence zone. Hot weather is then expected to intensify again before thunderstorms become more widespread across the region from June 8-10.

Meanwhile, central Vietnam remains the country's heat hotspot. Under the influence of a western low-pressure system combined with foehn winds, many areas are forecast to experience severe heat, with some locations facing exceptionally intense conditions.

Along the south-central coast, weather conditions are expected to be more moderate, with intermittent sunshine during the day. However, scattered showers and thunderstorms may develop in the evening and at night, with localized heavy rainfall possible.

In the Central Highlands and southern Vietnam, a low-pressure trough combined with the southwest monsoon will continue to trigger widespread showers and thunderstorms, mainly during the late afternoon and evening. Some areas could experience heavy to very heavy rain.

Forecast for June 4-13

From the night of June 3 through June 5, northern Vietnam will experience highly variable weather.

During June 4, scattered showers and thunderstorms are expected during the evening and overnight hours. Mountainous areas will see more widespread rainfall of 15-30mm, with isolated locations receiving more than 80mm. Most of the rainfall is expected during the afternoon and evening.

Daytime conditions will remain sunny, with some areas experiencing hot weather. Midland and delta provinces are expected to face widespread heatwave conditions, with isolated pockets of severe heat.

From the night of June 4 through June 5, northern Vietnam is forecast to see moderate to heavy rain and thunderstorms during the evening and overnight hours, with rainfall totals ranging from 20-40mm and isolated areas exceeding 100mm. Daytime thunderstorms will remain scattered, while heatwave conditions persist across the delta region.

From Thanh Hoa to Da Nang and eastern parts of Quang Ngai Province, scattered showers and thunderstorms are expected during the evening and overnight hours. Daytime temperatures will remain high, with widespread heatwaves and severe heat, while some locations may experience exceptionally intense heat.

Central coastal provinces are expected to follow a similar pattern, with isolated evening showers but persistent daytime heat and severe heat.

Southern Vietnam and Lam Dong Province will continue to experience scattered showers and thunderstorms during the afternoon and evening, with localized heavy to very heavy rainfall.

Other parts of the country are expected to see isolated showers and thunderstorms, especially during the late afternoon and evening, when rainfall could become locally heavy.

Widespread thunderstorms expected in the north

Looking further ahead to June 5-13, meteorologists say northern Vietnam will continue to alternate between periods of hot weather and thunderstorms.

On June 6-7, midland and delta areas are forecast to experience heatwave conditions, with some locations reaching severe levels. From the night of June 5 through June 7, mountainous areas are expected to receive scattered showers and thunderstorms, with localized heavy rainfall concentrated during the evening and overnight periods.

Of particular note, from the evening of June 8 through June 13, showers and thunderstorms are expected to become more widespread across northern Vietnam.

During the period from the night of June 8 through June 10, strengthening continental high pressure combined with upper-level wind convergence may trigger moderate to heavy rainfall, with isolated areas receiving very heavy downpours.

For the north-central region, hot weather and severe heat are expected to continue from the night of June 5 through June 8. Scattered evening thunderstorms are also possible. From June 8-13, showers and thunderstorms are forecast to become more widespread, with localized heavy rainfall.

Central coastal provinces are expected to maintain hot and severely hot conditions during the daytime, while scattered showers may occur during the evening and overnight hours.

Across the rest of the country, isolated showers and thunderstorms are forecast in the late afternoon and evening, while daytime conditions remain generally sunny, with some areas experiencing hot weather.

The Central Highlands and southern Vietnam are expected to continue seeing scattered showers and thunderstorms on most days during the forecast period.

Meteorologists warned that thunderstorms nationwide could be accompanied by tornadoes, lightning, hail and strong gusty winds. Residents are advised to closely monitor forecasts and take appropriate precautions.

Bao Anh