Publication Date May 13, 2019

Extremely heavy rain hits Yonaguni, Okinawa, Japan - 367 mm (14.4 inches) in 6 hours

Yonaguni, Okinawa, Japan location. Image: Google, TW

A stationary front dumped extremely heavy rain on the island Yonugani, Japan's southernmost province of Okinawa on Monday, May 13, 2019. An evacuation advisory was issued for the entire island.

The Japan Meteorological Agency (JMA) said the town, located in the district of Tokorono, received 399.5 mm (15.72 inches) of rain in 24 hours to 09:20 JST on May 13.

The agency said an extremely heavy level of 367 mm (14.44 inches) fell in just over 6 hours and 276.5 mm (10.88 inches) in a three-hour period from 06:10 JST - the heaviest since detailed records began in 2003.

In just one hour to 07:26 JST on May 13, the district received 109.5 mm (4.31 inches). This is its highest amount of rain ever recorded in the month of May.

This much rainfall is seen on a scale of 1 every 50 years, JMA said.