The weakening but still volatile weather system was moving Monday into the U.S. Southeast and Mid-Atlantic, bringing thunderstorms, hail, damaging winds and the potential for more tornadoes.

Extreme weather warnings remain in place for Florida up through Pennsylvania Sunday before massive storm moves eastward to Atlantic Ocean

America faces another tornado-thunder assault after killer cyclones left more than 30 dead in a weekend of chaos. A massive clean-up across six states will be hampered by another storm whipping up to smash the Midwest.