Etau Pulls Away from Japan, Leaving Flooded Cities

By By Eric Leister, Meteorologist
September 12, 2015, 5:54:43 PM EDT

Following landfall early on Wednesday, Etau continues to bring heavy rain to parts of Honshu. However, the heaviest rainfall will shift northward on Friday finally bringing relief to areas that have experienced devastating flooding.

Etau formed south of Japan last weekend and become better organized as it moved northward early this week prior to making landfall in Japan.

This system made landfall just west of Hamamatsu, Japan early on Wednesday, local time, and then exited into the Sea of Japan Wednesday evening. Even as Etau pulled away from Japan a band of heavy rain continued to drench parts of Honshu including Tokyo through the day on Thursday.


Some places saw too much rain. As of 9 p.m. on Wednesday, Nikko, Japan had 249 mm (9.8 inches) of rain, causing flooding throughout the region.

By the time rain is said and done on Thursday night, some locations will have received have more than 300 mm (12 inches) of rain in the past 24 hours. As all of this water rushes off the mountainous terrain, flooding and mudslides will remain a serious concern.

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As Etau slowly moves northward away from Japan, the system will continue to weaken. Through the end of the week, a few lingering showers could be possible across central Japan, but the flooding threat will diminish. Any wind threat has already ended.

Rainfall during the second half of the week is expected to lessen across much of Japan, though additional rainfall could still lead to isolated flooding problems in northern Honshu on Friday.

Detailed Tokyo Forecast
Japan Weather Center
Western Pacific Typhoon Center

Meanwhile, Tropical Storm Kilo will approach Japan before turning northward from Friday into the weekend. This track will take Kilo close enough to Hokkaido that the outer bands of the storm will bring downpours and strong winds to eastern Hokkaido.

Residents along the western Pacific Ocean should be on the watch for additional tropical threat through the fall, according to AccuWeather's Fall Forecast for Asia.

Meteorologists Adam Douty and Courtney Spamer contributed to this story.

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