According to the National Center for Hydro-Meteorological Forecasting, today (May 21), the low pressure trough is being compressed and pushed south by the strengthening cold air mass in the North.
Due to the influence of the compressed low pressure trough combined with wind convergence above 1,500m, from the night of May 22-23, in the North and Thanh Hoa, there will be showers and scattered thunderstorms, locally heavy rain with rainfall from 20-40mm/24h, in some places over 60mm/24h.
From the evening of May 23-24, rain continued to spread to the area from Nghe An to Thua Thien Hue, with rainfall of 10-30mm/24 hours, in some places over 50mm/hour.
However, before the weather turns cool and rainy in the North and Central regions, today, the Northwest and the area from Thanh Hoa to Phu Yen are still in the longest heat wave since the beginning of the year, starting from May 16.
According to the meteorological agency, the temperature at 1 p.m. was over 39 degrees in some places, such as: Muong La (Son La) 40.4 degrees, Phu Yen (Son La) 39.9 degrees, Hoi Xuan (Thanh Hoa) 40.4 degrees, Tuong Duong (Nghe An) 39.4 degrees...; the lowest relative humidity was 35-60%. In the Northeast, there was hot weather.
Tomorrow (May 22), the Northeast region will continue to experience hot and extremely hot weather, with some areas experiencing extremely hot weather with the highest temperature of 35-38 degrees Celsius, some areas above 39 degrees Celsius; the lowest relative humidity is 40-60%. On May 23, the hot weather will end in this area.
Also on May 22, the Northwest and the area from Thanh Hoa to Phu Yen still experienced peak heat with temperatures of 37-40 degrees, some places over 40 degrees; the lowest relative humidity was 35-60%.
According to the meteorological agency, from the night of May 22-23, in the North and Thanh Hoa, it will start to rain, dispelling the long heat, but by May 23, the Northwestern regions of the North and from Nghe An to Phu Yen will still be scorching hot, with temperatures dropping slightly, to 35-38 degrees, in some places above 39 degrees.
By the evening of the same day, from Thanh Hoa to Thua Thien Hue there will be thunderstorms, the heat will gradually subside.
In particular, meteorological experts warn that after a long period of intense heat, extreme weather conditions such as heavy rain, thunderstorms, hail, etc. will appear, causing damage to houses, trees and crops.
According to experts, after a few days of cooling down, the above areas will enter a new heat wave.
In addition, due to the influence of the Southwest monsoon, in the afternoon and evening of May 22, in the Central Highlands, the South and the southern part of the South Central Coast, there will be scattered showers and thunderstorms, locally with moderate rain, heavy rain with rainfall of 10-30mm, in some places over 50mm.
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