Typhoon Morakot

After the formation of Morakot, the moving speed was not slow, but when Morakot approached the island of Taiwan Province Province, the speed slowed down obviously. Morakot rotated for several hours, and the storm circle continued to cover Taiwan Province Province. Finally, the typhoon landed in Hualien at around 23: 50 on August 7, and the maximum gust in Hualien reached 14(pu amplitude)(45m/s). After crossing the island of Taiwan Province Province, the speed increased. However, after entering the Taiwan Province Strait, the speed of Morakot quickly slowed down and stagnated again. Under normal circumstances, it only takes 12 for a typhoon to cross the Taiwan Province Strait.

2. Topography of Taiwan Province Province.

Before Morakot landed, there was a strong wind to the west of the central mountain range in Taiwan Province Province, so the rainfall in Taiwan Province Province, which was already in the storm circle, and the topographic precipitation formed by the windward slope became more violent. After landing in the Taiwan Province Strait, the intensity of Morakot weakened, and the wind weakened to 12, but at this time, the superposition of topographic precipitation and storm in Taiwan Province Province became more violent.

The southwest monsoon has given Morakot endless strength.

After entering the Taiwan Province Strait, the Morakot intensity remained at 12 for a long time, and the cloud system was always strong. This is not unrelated to the strong southwest monsoon at that time. The southwest monsoon continuously provides abundant water vapor for Morakot cloud system, which makes the southern part of Taiwan Province Province continue to have heavy rain.

According to statistics, the rainfall in southern Taiwan Province Province has exceeded 1000mm, and it has exceeded 2,000mm in many places. Alishan area has reached 2,855mm, which is equivalent to five to six years of precipitation in Beijing.