Weather forecast for the next 24 to 48 hours
The National Center for Hydro-Meteorological Forecasting said that the weather in the Northern region will continuously change during the day.

The Northern region will have scattered showers and thunderstorms at night, especially in the plains on the night of May 20, there will be scattered showers and thunderstorms, locally heavy rain; sunny day, some places have hot sunshine.
The Central region will have scattered showers and thunderstorms in the evening and at night, especially in the South Central region from the afternoon and evening of May 21, there will be scattered showers and thunderstorms; sunny days, some places have hot weather, especially in the area from Thanh Hoa to Phu Yen, there will be hot weather, some places have severe heat.
The Central Highlands and the South will have scattered showers and thunderstorms in some places, with scattered showers and thunderstorms in the afternoon and evening, with some places having heavy rain. From the evening of May 21, these areas will have rain, moderate rain and scattered thunderstorms, with some places having heavy rain.
The meteorological agency warns that thunderstorms may cause tornadoes, lightning, hail, and strong gusts of wind.
Weather forecast from the night of May 22 to May 30
The National Center for Hydro-Meteorological Forecasting has made a statement on notable weather trends in some areas from the night of May 22 to May 30.

The Northern region will have moderate rain, heavy rain and scattered thunderstorms from around the night of May 22 to the end of May 24, locally very heavy. From May 25 to the end of the forecast period, the North will have scattered showers and thunderstorms, with some places having heavy rain. Rain will be concentrated in the late afternoon and night.
The North Central region will have scattered showers and thunderstorms; from the evening and night of May 23 to the night of May 24, there will be moderate rain, heavy rain and thunderstorms, locally heavy rain.
The Central Central region will have showers and thunderstorms in some places in the evening and at night, sunny during the day, and hot weather in some places.
The South Central region will have scattered showers and thunderstorms in some places, especially in the afternoon and evening of May 22 - 25.
The Central Highlands and the South from the night of May 22 to 25 will have rain, moderate rain and thunderstorms, with some places having heavy rain. From May 26, these two areas will have scattered showers and thunderstorms in some places, with scattered showers and thunderstorms in the afternoon and evening, with some places having heavy rain
The meteorological agency warns that thunderstorms may cause tornadoes, lightning, hail, and strong gusts of wind.