Fox News Weather Center

Typhoon Lionrock to slam northern Japan with flooding rainfall into Tuesday

Typhoon Lionrock is poised to make landfall in Japan on Tuesday afternoon local time with heavy rainfall, damaging winds and an inundating storm surge.

The storm surge could reach 1-2 meters (3-6 feet) in certain locations.

Lionrock will move northward over the open waters of the northern Pacific Ocean, posing hazards to shipping interests as it churns up dangerously rough seas prior to its arrival in Japan.

Rough seas are already battering much of Japan's coastline. However, the worst conditions are expected just ahead of Lionrock's arrival in northern Honshu on Tuesday. Large swells will batter the southern and eastern coast of Hokkaido on Tuesday night and into Wednesday.

Lionrock will begin a turn to the northwest in the next 12 hours as the cyclone interacts with a non-tropical system over the Sea of Japan.

This interaction will pull Lionrock into northern Honshu on Tuesday while a band of heavy rain falls west of the cyclone. Landfall is estimated to occur just north of Sendai.

Widespread rain up to 50-100 mm (2-4 inches) has fallen across southwest Honshu and Shikoku. Similar amounts could fall across central Honshu over the next 24 hours.

Though past its peak intensity, Lionrock is expected to be a typhoon at landfall. Its strength should be equivalent to that of a Category 1 hurricane with maximum-sustained winds near 120 km/h (75 mph).

"Wherever this landfall point ends up being, there will be damaging winds and flooding rainfall," AccuWeather Meteorologist Becky Elliott said. "The coast will also be pounded by rough surf and an inundating storm surge."

The risk of flooding rain and strong winds will then shift to northeastern China and Russia's Maritime territory as Lionrock weakens and eventually loses its tropical characteristics at midweek.

Given the current expected track of Lionrock, the potential exists for 75-150 mm (3-6 inches) of rain to inundate northern Honshu and southern and eastern Hokkaido through Tuesday night.

The combination of Lionrock and the large non-tropical system over the Sea of Japan will yield rainfall totals over 150 mm (6 inches) across northeast China and Russia's Marine territory through Thursday.

For those still recovering from Mindulle, any damaged items that remain loose could become dangerous projectiles. Trees or branches weakened by Mindulle could easily be downed by Lionrock as the cyclone moves through the area.

Residents in the path of Lionrock are urged to heed any evacuation orders in advance of the storm.

Content contributed by senior meteorologist Kristina Pydynowski and meteorologist Rob Richards