A wind convergence zone is forming at an altitude of 1,500 to 3,000m over northern mountainous and midland localities. This weather pattern will bring scattered rain and thunderstorms across regional localities that are forecast to receive between 10-30 mm, and even 70 mm of rain.
A new cold air mass to bring heavy rain to northern Vietnam
Meanwhile, a new cold air mass is striking northern border provinces, compressing the low-pressure trough and causing widespread rain and thunderstorms. The new cold front will dump heavy rain on northern mountainous and midland areas, with rain ranging from 50 to 100 mm, or even more than 200 mm.
Meteorologists warned about a high risk of flooding in low-lying areas and landslides in hilly and mountainous regions at any time, as the soil structure on the hillsides has been compromised following the recent landfall of typhoon Yagi.
They recalled that typhoon Yagi and subsequent flooding and landslides left more than 400 dead or missing in dozens of northern provinces and cities in September.
The new spell will send temperatures tumbling to a low of 20-21 degrees Celsius in the lowlands and 16 in the highlands.