Parts of Japan are bracing for more flooding after downpours triggered deadly mudslides and flooding last week.
Kanoya recorded 472.5 mm (18.60 inches) in a single day and more than 600 mm (25 inches) over a three-day period during last week's flooding event.
A slow-moving storm system is set to unleash widespread heavy rainfall across southern and central Japan from Wednesday into Friday, renewing the risk for flooding and mudslides for millions of people.
Downpours ahead of the storm's arrival triggered an evacuation advisory for Mihara in Kochi Prefecture on Tuesday.
Kyushu, far southwest Honshu and southern Shikoku will bear the brunt of the heavy rainfall on Wednesday which could result in more evacuation advisories.
Downpours will continue in these areas on Wednesday night and expand northward across southern Honshu and the remainder of Shikoku.
Heavy rainfall is expected across southern Honshu and Shikoku on Thursday morning with a few lingering showers across Kyushu. The rainfall will taper off across Shikoku during the afternoon with downpours expanding northward across Honshu.
Total rainfall through Thursday of 75-150 mm (3-6 inches) will be common across southern Japan with an AccuWeather Local StormMax™ of 400 mm (16 inches).
This magnitude of rainfall can lead to life-threatening flash flooding and mudslides. Travel delays are also expected to be common across the region.
The rain will continue to slowly track northward Thursday night into Friday, reaching the Greater Tokyo Area late Thursday night into Friday.
Localized flooding is possible; however, significant delays to the morning commute on Friday are expected.
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The storm will shift northward this weekend, bringing scattered showers with local downpours to northern Honshu and Hokkaido.
Another round of downpours may once again target Kyushu, Shikoku and eastern Honshu this weekend continuing the risk for flooding and mudslides.
The rainy season typically affects Japan from May through July; however, additional rounds of heavy rainfall are possible from August to October as tropical cyclones affect the country.
South Korea will also be affected by this storm system with downpours forecast for southern and eastern parts of the country from Wednesday into Thursday. Localized flooding and travel delays are possible during this time.
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