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Malakas to spawn damaging winds, inundating rainfall in Japan early this week

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Typhoon Malakas will bring another round of dangerous flooding to Japan through Tuesday.

Malakas already brought damaging winds and flooding rainfall to Japan's southern Ryukyu Islands over the weekend. A sustained wind speed of 163 km/h (101 mph) was measured, along with over 200 mm (8 inches) of rain in Yonaguni.

Despite being past peak intensity, Malakas is likely to be the equivalent to a Category 1 hurricane when it slams into Japan's Kyushu Island and the northern most Ryukyu Islands on Monday night.

Malakas should then track across southern Japan, quickly weakening and losing its tropical characteristics by Wednesday.

Despite weakening, residents should heed any evacuation orders in advance of Malakas.

Damaging winds will arrive in southern most Kyushu and the northern Ryukyu Islands on Monday night. Wind gusts of 130-160 km/h (80-100 mph) are expected to blast these areas. Power outages and some structural damage are expected.

Disruptive, but less damaging winds will blow across the rest of southern Japan into Tuesday.

While the risk of damaging winds and an inundating storm surge will be higher across southern Kyushu than Shikoku and southern Honshu, Malakas will produce torrential rainfall across much of Japan, including Kochi, Osaka and Tokyo.

The potential exists for widespread rain totals of 100-200 mm (4-8 inches) from southern and central Kyushu to central Honshu.

This rain will fall on top of soil that has already been saturated during the second half of summer, especially in eastern Japan.

Tokyo's International Airport has received 392 mm (15.43 inches) of rain since 1 August, more than 250 percent of normal.

Aside from the threat for flooding, heavy rainfall from Malakas could also trigger mudslides across the rugged terrain of southern and central Japan.