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Cat 4 Nock-Ten Making Landfall On Luzon - On Christmas - Massive Flooding, Surge Expected
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Known in the Philippine area of responsibility as "Nina," this typhoon moved over a favorable environment for strengthening, where vertical wind shear was low and sea-surface temperatures were very warm.
Nock-ten underwent rapid intensification Friday afternoon through Saturday morning Eastern Standard Time, meaning the typhoon's maximum sustained winds increased by at least 30 knots (about 35 mph) in 24 hours or less.
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Steered generally toward the west-northwest by high pressure to its north, Nock-ten/Nina is making landfall first on Catanduanes Island on Christmas Day as the equivalent of a Category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale, with winds of 155 mph.
According to Dr. Phil Klotzbach, Nock-ten is the strongest northwest Pacific tropical cyclone so late in the season since Susan in 1963 and Hester in 1952. Its winds of 155 mph also make it the strongest tropical cyclone anywhere in the world on Christmas Day since 1960.
EDIT
https://weather.com/storms/typhoon/news/typhoon-nock-ten-nina-philippines-christmas