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Thunder accompanied by heavy showers brought near record-setting rainfall Thursday to much of the Tohoku and Kanto-Koshin regions (Yamanashi and Nagano Prefectures), resulting in train delays and warnings from the Meteorological Agency.

Cold temperatures combined with a low pressure system in the afternoon destabilized the atmosphere and unleashed strong thunder showers, which visit the Kanto region only every few years.

Yokohama received 88 mm of rainfall in a one-hour period in the early evening, breaking the previous record of 82 mm, the agency said.

The torrential showers initially forced the Tokaido shinkansen trains operating between Shin-Yokohama and Odawara stations to reduce speeds to between 70 kph and 170 kph. Service was then suspended at 6:45 p.m., but resumed at 7:20 p.m.

Tokyo’s Machida received 80 mm of rainfall and Hachioji 81 mm, the most since August 1995, according to the agency. The agency releases heavy rain announcements when more than 80 mm is recorded in one hour. Tokyo’s record for rainfall in one hour is 88.7 mm, which fell on Tokyo’s Otemachi district in 1939.

According to the agency, heavy showers centering around the Tohoku and along Sea of Japan areas had also inundated Yamagata, Akita and Niigata prefectures with precipitation. All three prefectures recorded more than 100 mm of rainfall for the 24-hour period leading up to Thursday evening, with some areas nearing the 130 mm mark.

The low pressure front that was moving eastward over the Sea of Japan in the evening will bring heavy precipitation of between 20 mm and 30 mm per hour to some parts of Tohoku today, according to the agency.

The agency’s Sendai observatory predicted on Thursday night that the Tohoku region may see a thunder storms and heavy rain this morning, warning that this could raise river levels and cause landslides.

In Akita Prefecture, 28 people were evacuated to a local meeting facility when a landslide slid down a hill and into the back yard of a local resident.

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