July 07, 2021 11:06
At least two people have died and around 100 were evacuated after South Jeolla Province was pounded by heavy monsoon rains on Monday and Tuesday.
The torrents were concentrated at night and the early morning hours when people are more vulnerable. The reason is a low-level jet system, or winds traveling more than 13 m/s at an altitude of just 1-3 km.
The jets form on the edges of a North Pacific high-pressure system and approach the Korean Peninsula from the south carrying lots of condensation from the warm ocean.
They grow stronger after sunset, when they are no longer deterred by hot air rising from the earth's surface.
Most of Korea, including the Seoul metropolitan area, is expected to see heavy rains on Thursday and Friday.
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