Tornado threat subsides but major flooding still a concern in central US

There were 398 reported tornadoes in the U.S. over the past 13 days.

There is still a tornado threat in the Northeast on Wednesday for major cities such as Philadelphia, Baltimore and Washington, D.C. The threat for damaging winds and hail extends into West Virginia and Ohio and Kentucky.

A few storms could also develop in western Texas, near Midland and Del Rio, where damaging winds and hail are possible.

The Arkansas River crested at 23.41 feet near Tulsa, Oklahoma, making it the highest crest since 1986 and second-highest in the city's history. It will continue to be in major flood stage for days to come.

The river is also in major and record flood stages in Arkansas, and continues to rise in some areas. It will rise into major flood stage near Little Rock by this weekend and will stay in major flood stage into next week.

Flood warnings cover the central U.S., due to the rising -- or already flooded -- rivers.

There is a flash flood watch for the Northeast, including Philadelphia, on Thursday due to the heavy rain forecast.

After Thursday, the severe weather pattern slows down and there is no rain forecast along the Arkansas River or much of the Missouri and Mississippi rivers.