Over the holiday weekend, the U.S. will experience a temperature divide, with cool conditions in the Northeast and Midwest and warmth in the South and West. Severe weather, including thunderstorms and heavy rain, is forecasted for the Plains and parts of the South, particularly affecting areas from Texas to Alabama, with risks of flash flooding. Conversely, pleasant conditions will prevail in the Northeast and Midwest, with milder temperatures expected in the coming days, contrasting with the unsettled weather in the central U.S.