Two blocks of hot and cold air interacted, the North faced heavy rain and thunder and hail

On May 9, the National Hydrometeorological Forecast Center broadcasted a warning newsletter about heavy rains in the North and North Central.

Accordingly, a block of cold air in the North is moving down near the northern part of our country.

It is forecasted that around 10-5, this cold air block will affect some places in the northeastern mountains, around the evening and night of 10-5, cold air is stronger to affect other places in the Northeast, after affecting the North Central, the Northwest and some places in Central Central.

From the night of 10-5, the North and North Central of the sky turned cool, the Northern mountains were cold.

Hanoi from the night of 10-5 weather moved cool.

Notably, this cold air compresses low pressure groove, causing a large area of ​​heavy rain in the North and North Central.

Specifically, in the evening and tonight, the North and Thanh Hoa have scattered showers and thunderstorms, some places with heavy rainfall with rainfall from 15-30mm, locally locally over 60mm.

During the day and night of 10-5, the Northern mountainous area is moderate, heavy rain, local in some places with very heavy rain and thunderstorms with common rainfall from 20-50mm, some places over 100mm.

From the afternoon and night of 10-5, the plain and the Northern Midlands have moderate rain, heavy rain, localities in very heavy rain and thunderstorms with rainfall from 30-70mm, some places over 150mm.

From the afternoon of 10 to 11-5 morning, the North Central region has moderate rain, heavy rain, some places are very heavy and thunderstorms with rainfall from 30-70mm, some places over 150mm.

From 11-5, rain in this area gradually decreased.

According to weather experts, the cause of this heavy rain is due to the interaction between cold air and hot, humid air blocks covering the North.

“The strong fighting between these two opposite gases makes the weather become unstable and easily generated extremist phenomena such as thunderstorms with tornadoes, thunder, hail and strong winds, especially in the evening and night.

Wide and overwhelming rain in a short time can also cause local flooding in urban areas, flash floods, landslides in the mountainous areas ” – experts warn.