Double Tropical Threat for Japan

By , Senior Meteorologist
August 1, 2014; 11:54 AM ET
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Play video An overview of the weather across Asia is discussed in the above AccuWeather.com video.

While tropical downpours are soaking Japan and South Korea this weekend, Halong is the next tropical danger to Japan and has become a super typhoon.

Halong has been rapidly intensifying to start the weekend, becoming a super typhoon early Saturday night local time with maximum sustained winds of 250 kph (155 mph).

Further strengthening is possible before the weekend is over.

Halong will not impact land through at least Tuesday, remaining over the open waters of the western Pacific and creating life-threatening dangerous seas for shipping interests.

While the current path of Halong puts the northern Ryukyu Islands and southern Japan at greatest risk of a direct landfall with heavy rain and damaging winds later in the week, all residents of Japan, the Korean Peninsula and northeastern China should closely monitor the typhoon for potential dangers and any adjustments to the forecast track.

The immediate concern Japan and South Korea is Tropical Storm Nakri spinning in the South China Sea.

RELATED:
West Pacific Typhoon and Tropical Storm Center
Japan Interactive Radar
South Korea Weather Center

Tropical Storm Nakri will continue to spread tropical downpours from the Ryukyu Islands up to Japan's islands of Kyushu, Shikoku and western Honshu and to South Korea through the rest of this weekend.

Flooding and mudslides are a serious concern, especially across southwestern Japan and southern South Korea where several days of downpours will push rain totals through Sunday past 150 mm (6 inches).

Some areas may get the additional rain on Monday, prolonging the flood and mudslide danger.

Any flooding problems in Seoul, where rainfall totals should be on the order of 50 to 100 mm (2 to 4 inches), would likely be localized. Tokyo, meanwhile, will escape the low's downpours.

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