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Six tropical cyclones occurred over the western North Pacific and South China Sea in November 2009. Amongst them, Nida attained super typhoon intensity while traversing the northwest Pacific, and was the most intense tropical cyclone up to November this year.
After entering the South China Sea towards the end of October, Mirinae weakened into a tropical storm over the central part of the South China Sea on the morning of 1 November. Mirinae made landfall over the central part of Vietnam in the evening of 2 November. It dissipated over southern Vietnam the following morning. According to press reports, Mirinae triggered severe flooding in central Vietnam where at least 90 people were killed and 22 others missing. More than 13,000 houses were damaged and some 5,000 hectares of farmland were affected.
A tropical depression formed over the western North Pacific about 590 km east-northeast of Manila on 2 November and moved west-southwestwards. The tropical depression dissipated over the waters to the east of Luzon in the following morning.
Another tropical depression formed over the western North Pacific about 990 km west-northwest of Wake Island on 8 November and moved eastwards. It dissipated over the western North Pacific the following day.
Nida formed as a tropical depression over the western North Pacific about 810 km south-southeast of Guam on 22 November and was slow-moving initially. Nida intensified into a tropical storm on 23 November and moved generally northwestwards. It intensified into a severe tropical storm the next day. Nida intensified into a typhoon about 350 km south-southwest of Guam on the morning of 25 November. It continued to strengthen further that day and became a super typhoon that evening. Nida became slow-moving again on 28 and 29 November over the western North Pacific to the south-southwest of Iwo Jima. It weakened continuously and became a typhoon on 30 November and moved west-northwestwards.
A tropical depression formed over the western North Pacific about 840 km southeast of Manila on 24 November and moved slowly east-northeastwards. The tropical depression dissipated over the waters to the east of the southern Philippines on 25 November.
Another tropical depression formed over the South China Sea about 500 km south-southeast of Ho Chi Minh City on 24 November and moved east-northeastwards. The tropical depression dissipated over the southern part of the South China Sea on 26 November.
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