A rare cold wave in the past 40 years is about to hit the North, the temperature will drop sharply

On May 8, in the North, the area from Thua Thien Hue to Khanh Hoa and the South had showers and thunderstorms, with heavy rain locally such as (rainfall from 7:00 a.m. to 8:00 p.m. on May 8): Thu Lum (Lai Chau) 174.6mm, Na Po (Son La) 66.4mm, Pho Lu (Lao Cai) 59.6mm, Phuoc Hiep (Quang Nam) 70mm, Vinh Trach (An Giang) 78.2mm,…

Day and night (May 9) in the North and the North Central There are showers and thunderstorms, local moderate rain, heavy rain with a rainfall of about 30-60mm/24h, in some places over 80mm/24h (rainstorm concentrates in the afternoon and at night). During thunderstorms, there is a possibility of tornadoes, lightning, hail and strong winds. Risk of flash floods, landslides in mountainous provinces and inundation in low-lying areas. Thunderstorm warnings in the northern regions are likely to last until May 11.

Further forecast, the Center for National Conservation and Conservation said that the North is about to have a rare cold air wave in May. This cold air wave will take place from May 13 to 15, possibly causing strong winds over the Gulf of Tonkin. up to level 6, jerk level 7-8.

It is forecast that the lowest temperature in the mountains may drop below 16 degrees, the Northern Delta region (including Hanoi) is forecasted to be the lowest from 20-23 degrees.

Cold air causes rain, the temperature drops (Illustration image)

“It can be said that this is one of the rare cold air waves in May. The northeast monsoon causes strong winds in the Gulf of Tonkin up to level 6, level 7-8. The lowest temperature is forecast in the mountains. May drop below 16 degrees Celsius, the Northern Delta and Hanoi are forecast to be the lowest 20-23 degrees Celsius.

In addition to the deep drop in temperature, it is also accompanied by heavy to very heavy rain from May 13, especially in the mountains of the North. There is a high risk of multiple natural disasters such as lightning storms, hail, strong winds, landslides, floods in mountainous areas, and partial flooding in low-lying areas. Hydrometeorological Forecasting Center national literature information.

Thus, there are only about 5 days left in the North to welcome the rain and cold.

How to judge weather from the night of 9 to 17/5

The continental high pressure continued to weaken, establishing a low pressure trough with an axis at about 25-28 degrees North latitude. Then from 10-13/5, this low pressure trough tends to be compressed and gradually pushed down to the North region by the strengthening of the cold continental high pressure in the North. From May 14, the low pressure trough is likely to continue to be pushed to the south and then fade away.

The southern low-pressure trough with an axis at about 4-7 degrees North latitude is weakly active and fading. From about May 12-13, the southwest wind tends to establish in the southern region.

At high altitude, from May 10 to 12, the subtropical high pressure tends to gradually encroach to the West after having a stable intensity. Particularly in the period from May 9-11, the wind convergence area up to 5000m is still weak in the Northern region. From about May 13, the subtropical high pressure weakened.

Warning:

– Southern region: There are scattered showers and thunderstorms on May 8 and the period from May 13 to 17 (rain concentrated in the evening and evening).

– From the night of May 07-08, the North has scattered showers and thunderstorms (focusing on evening and night); then from May 9-12 in the evening and at night there are rain, scattered showers and thunderstorms, sunny days; From the night of May 12-13, there will be showers and scattered thunderstorms in the North, with moderate and heavy rain locally.

– From May 8 to 10, the North Central region has scattered showers and thunderstorms (rainfalls are concentrated in the afternoon and evening). From the night of May 13-14, the North Central region has showers and scattered thunderstorms, with heavy rain locally.

During thunderstorms, there is a possibility of tornadoes, lightning, hail and strong winds.