Typhoon Lan was drenching Japan’s main island of Honshu with dangerous torrential rains on Sunday as the Category 3 typhoon, with sustained winds of 120 mph at 8 am EDT Sunday, sped northeast at 29 mph towards Tokyo. Lan is interacting with a frontal system that has brought high wind shear and dry air into the typhoon, resulting in the collapse of its inner core. Passage over cool waters of 25°C (77°F) as Lan approaches the coast will cause further weakening, and Lan is likely to be a Category 1 typhoon when it makes landfall Monday morning (Sunday afternoon U.S. EDT), about 100 miles southwest of Tokyo....The storm made landfall a couple hours ago.
...Torrential rains and high landslide risk
While high winds will cause considerable damage and loss of power across much of Honshu, Lan’s primary threat is heavy rain. A moist flow of tropical air interacting with a stalled front had already begun to trigger heavy rains over Japan on Friday, and now that Lan’s rains have reached the nation (see latest Japanese radar images), record 48-hour rainfall amounts have been observed in some locations. As of 21:20 JST Sunday, Lan brought a record 48-hour rainfall amount for October of 700 mm (27.56”) to Shingu, located about 300 miles southwest of Tokyo. In records going back to 1976, the highest 48-hour rainfall there for any month was 782 mm (30.79”). Kamoda, in the Shikoku region, also set an October 48-hour rainfall record today, with 299.5 mm (11.79”.) Additional heavy rains of over 10” are expected over some areas of Japan....MORE
Super-Typhoon Lan Aiming Directly At Tokyo