A strengthening storm system will spread heavy rainfall across the Yangtze River Valley through Sunday night.
Along this path, the major cities of Chongqing, Wuhan, Nanjing and Shanghai can expect locally heavy rainfall. Some thunderstorms embedded in the rainfall will produce strong winds and even hail, but flooding appears to be the primary concern at this point.
The storm will track from west to east bringing the heaviest rainfall to Chongqing through Saturday night and Wuhan into early Sunday. These areas can expect a general 1-3 inches (25-75 mm) of rainfall with locally higher amounts possible. Already 0.55 of an inch (14 mm) has fallen at Chongqing as of Saturday afternoon, local time.
The storm will impact Nanjing Sunday into Sunday night with 1-3 inches (25-75 mm) of rain while Shanghai will experience a period of heavy rainfall late Sunday into early Monday. The worst of the storm is expected to miss Shanghai with rainfall averaging 1-2 inches (25-50 mm).
Since all of these major cities are located along the Yangtze River, flooding is always a major concern when a heavy rainfall event is expected.
In 1998, a prolonged period of flooding along the Yangtze River resulted in 3,704 deaths, while millions were homeless at some point during the flooding.
Farther south, a line of heavy thunderstorms with damaging winds will be possible Saturday night into Sunday from Guizhou province into Hunan and Guangxi provinces as the cold front presses southward.
The front is expected to weaken before reaching Hong Kong early next week. Ahead of this front, there will be the possibility of scattered showers and thunderstorms each day. Due to the recent heavy rainfall across the area, any thunderstorms could result in flash flooding problems.
Senior Meteorologist Rob Miller contributed to this story.
Tropical Depression 8 should strengthen into a tropical storm before impacting the coastal Carolinas with rough surf and heavy downpours early this week.
Tropical Depression 9 developed just south of Florida on Sunday and will turn toward the northeastern Gulf Coast of the United States this week.
Brief relief from heat and humidity will arrive in the northeastern United States at the start of September.
Typhoon Lionrock is poised to make landfall in Japan near Sendai early in the new week with heavy rainfall, damaging winds and an inundating storm surge.
Hawaii is facing two tropical threats this week as Madeline and Lester churn westward.
Hot and dry weather will greet fans and competitors at the 2016 U.S. Open Tennis Championships in Flushing, New York, as play begins Monday, Aug. 29.
Houston, TX (1980)
2.23 inches of rain fell in less than 1 hour. Streets were flooded in the downtown district and a tornado touched down briefly west of Houston at Sealy, TX.
Pittsburgh, PA (1982)
39 degrees, coldest ever in August.
Anchorage, AK (1989)
A total of 9.6 inches of rain -- wettest August on record.