Tropical Storm Dianmu will spin northward over the South China Sea to alikely rain-soaked landfall on South Korea at midweek.As of Monday morning, EDT, the center of Dianmu was located about 200 milesnorthwest of Okinawa. Movement was towards the north at 15 mph with highestsustained winds of 50 to 55 mph.

A landfall, as a tropical storm, upon South Korea, most likely in thesouthwest, is forecast for early Wednesday.

Such a landfall would bring with it a serious threat of flooding rain. Alesser threat of damaging winds would accompany a tropical storm landfall.

Were Dianmu to strengthen significantly more than forecast, even to atyphoon, destructive winds would happen near its landfall.

Story by AccuWeather.com Senior Meteorologist Jim Andrews.