According to the National Center for Hydro-Meteorological Forecasting, tonight May 7, this cold air mass will affect the Northeast region, then affect the North Central region and some places in the Northwest region.
In the Northeast region and Thanh Hoa, the weather turns cool. The lowest temperature in this cold air wave in the Northeast region and Thanh Hoa is commonly from 21-24 degrees C, the Northern mountainous region has places below 21 degrees C.
Hanoi area from this evening will have rain, moderate rain and scattered thunderstorms, locally heavy to very heavy rain; from the night of May 7, the weather will turn cool. The lowest temperature is commonly 22-24 degrees C.
Forecast for tonight, the Northeast region and Thanh Hoa will have the lowest temperature from 21-24 degrees, mountainous areas in some places below 21 degrees C, average temperature from 24-26 degrees C, mountainous areas in some places below 24 degrees C.
The Northern region, Thanh Hoa and Nghe An have rain, moderate rain and scattered thunderstorms with rainfall of 20-40mm, locally heavy to very heavy rain over 100mm.
From this evening, the area from Ha Tinh to Hue City will have scattered showers and thunderstorms with rainfall of 10-30mm, locally heavy rain over 70mm. In thunderstorms, there is a high possibility of tornadoes, lightning, hail and strong gusts of wind.
People and tourists going out should bring umbrellas and raincoats to prevent sudden weather changes.

Weather forecast today May 7th nationwide:
Hanoi City
Lowest temperature: 25-27 degrees C.
Highest temperature: 30-32 degrees C.
Cloudy, showers and thunderstorms in some places; from tomorrow evening, cloudy, rain, moderate rain and scattered thunderstorms, locally heavy to very heavy rain.Southeast wind level 2–3.
Northwest
Lowest temperature: 23-26 degrees C, in some places below 22 degrees C.
Highest temperature: 30-33 degrees C.
Cloudy, showers and thunderstorms in some places; from tomorrow evening, cloudy, with rain, moderate rain and scattered thunderstorms, locally heavy to very heavy rain.Light wind.In thunderstorms, there is a possibility of tornadoes, lightning, hail and strong gusts of wind.
Northeast
Lowest temperature: 23-26 degrees C, mountainous areas in some places below 22 degrees C.
Highest temperature: 29-32 degrees C, in some places above 32 degrees C.
Cloudy, showers and thunderstorms in some places; from tomorrow afternoon cloudy, rain, moderate rain and scattered thunderstorms, locally heavy to very heavy rain.Southeast wind level 2–3.In thunderstorms, there is a possibility of tornadoes, lightning, hail and strong gusts of wind.
Thanh Hoa to Hue
Lowest temperature: 23-26 degrees C.
Highest temperature: 31-34 degrees C, in some places above 35 degrees C.
Cloudy, showers and thunderstorms in some places at night; sunny day, hot in some places; from tomorrow evening there will be scattered showers and thunderstorms, locally heavy rain; especially Thanh Hoa - Nghe An area will have rain, moderate rain and scattered thunderstorms, locally heavy to very heavy rain.Light wind.In thunderstorms, there is a possibility of tornadoes, lightning, hail and strong gusts of wind.
South Central Coast
Lowest temperature: 24-27 degrees C.
Highest temperature: 31-34 degrees C, in some places above 35 degrees C.
Cloudy, showers and thunderstorms in some places in the evening and at night; sunny during the day, hot in some places.Light wind.In thunderstorms, there is a possibility of tornadoes, lightning, hail and strong gusts of wind.
Central Highlands
Lowest temperature: 21-24 degrees C, in some places below 21 degrees C.
Highest temperature: 30-33 degrees C, in some places above 33 degrees C.
Cloudy, showers and thunderstorms in some places in the evening and at night; sunny day.Light wind.In thunderstorms, there is a possibility of tornadoes, lightning, hail and strong gusts of wind.
Southern region
Lowest temperature: 24-27 degrees C.
Highest temperature: 32-35 degrees C.
Cloudy, scattered showers and thunderstorms, locally heavy rain.Light wind.In thunderstorms, there is a possibility of tornadoes, lightning, hail and strong gusts of wind.
Ho Chi Minh City
Lowest temperature: 26-28 degrees C.
Highest temperature: 32-34 degrees C.
Cloudy, scattered showers and thunderstorms, locally heavy rain.Light wind.In thunderstorms, there is a possibility of tornadoes, lightning, hail and strong gusts of wind.