The Memorial Day weekend kicked off with a multi-day thunderstorm and heavy rainfall system hitting the south-central part of the country, forecasters said. Hundreds of thousands of people were under a severe thunderstorm watch the afternoon of Saturday,

Weather and flood threats increase into holiday weekend. Any pause in storminess after the week-long barrage that ended Wednesday is short-lived, as severe weather and flood threats increase into Memorial Day weekend across a big chunk of the south-central United States.

Sunday is a First Alert Weather Day for strong to severe thunderstorms. In the mountains, count on rain and thunderstorms with a cold mix above 10,000 feet.