Multiplerounds of thunderstormsare expected to hit the southern and central United States on Memorial Day, according to theNational Weather Service. Forecasters warn of excessive rainfall and severe thunderstorms over parts of the Southern Plains, as well as the Mississippi and Tennessee valleys on May 26. Flood watches have been issued over swaths of Arkansas, Louisiana, Oklahoma and Texas. Parts ofTexas, near Tyler, andLouisiana, near Shreveport and Natchez, have flash flood warnings, local weather service offices said. This article originally appeared on USA TODAY:Memorial Day forecast: Severe storms, rain in south-central US
