As Halong moved over southern Japan from Saturday into Sunday, local time, it brought drenching rainfall and destructive wind to the country. While moving across southern Japan, Halong weakened due to the interaction with land and lack of warm water.
Despite weakening from its peak strength, Halong still packed a punch across the islands of Shikoku, eastern Kyushu and southern Honshu.
From Saturday into Sunday, over 900 mm (35 inches) of rain fell at the Yanase observation site in Kochi Prefecture. During a 9-hour time span Saturday night, 800 mm (31 inches) of rain fell. Not far away, over 600 mm (24 inches) of rain fell in Torigatayam.
From NOAA, a less intense Tropical Storm Halong is seen across the Sea of Japan on Sunday night, local time.
Kochi Prefecture is the same region that saw extreme rainfall just a week ago from Tropical Storm Nakri. One location in Kochi Prefecture measured a record 1,186 mm (46.69 inches) in 72 hours, ending on Tuesday, according to information from the Japan Meteorological Agency.
Last week, AccuWeather.com Meteorologist Eric Leister reported that Nakri brought 250-500 mm (10-20 inches) of rain to some places in Kyushu and Shikoku, according to observation sites across these islands. Multiple locations received more than 10 inches within a single day.
Other impressive rain totals from Halong are 533 mm (21 inches) in Tokushima and 518 mm (20 inches) in Owase.
In the Wakayama Prefecture in southern Honshu, the Japan Times reports that the Kumano River in Shingu was flooding the first and second floors of a junior high school. Six locals had to be rescued from the third floor of the building.
Not only was there flooding rainfall, destructive wind also swept across the region. Near the center of the storm at landfall, wind was sustained at 145 kph (90 mph) at the Muroto-misaki observation site. In Tokushima wind gusted to 155 kph (96 mph).
The Japan Times reported as of Sunday, local time, that at least nine people have died as a result of Halong, two others are missing and dozens are injured.
While the worst of the conditions are in the past for Japan, although it will remain windy into Monday night across the northern island of Hokkaido, where gusts over 50 mph have already occurred. Showers will continue to cross the island, but rainfall should not be heavy enough to cause any additional flooding.
Now across the Sea of Japan, cooler water will continue to limit the moisture needed for tropical systems to survive, thus Halong will remain post-tropical as it moves farther north.
Despite the weakening, Halong remains a dangerous storm and will remain so into Monday night as it brings heavy rain and gusty winds to Primorye in southeastern Russia.
Though Halong is technically termed a post-tropical storm, the impacts from Halong in southeastern Russia will be similar to a tropical storm. Along the coast wind gusts will reach 50 mph which can down trees and cause power outages. Farther inland, wind will gust as high as 40 mph, which could still lead to some power outages.
Rain, some heavy, will continue into Tuesday across southeast Russia where localized flooding will be a concern.
After impacting southeastern Russia, Halong will rapidly weaken to a remnant low later Tuesday into Wednesday, pulling to the northeast into Sakhalin and bringing little additional impacts to the region.
Meteorologist Eric Leister contributed to this story.
The stage is for severe thunderstorms to target parts of the Ohio Valley as the weekend comes to an end.
Rounds of rain will bring good news for unusually dry portions of the northeastern United States to start May.
Residents of the southeastern United States may feel like the calendar has flipped ahead to Memorial Day weekend with warm and muggy weather in place for the start of May.
A stormy pattern will persist across the western Gulf Coast, threatening to trigger more flooding from Texas to Mississippi through at least Monday.
May is picking up where April left off with record-challenging warmth surging back into the northwestern United States.
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