Wednesday's forecast: Soaking continues in Central U.S.
The sodden Plains will see more rain and the chance for flooding on Wednesday as cooler air spreads over the Great Lakes and Northeast.
Central U.S.: Heavy rain and thunderstorms will drench the central and southern Plains, with the heaviest rain likely in portions of Oklahoma and Missouri. Flash floods are possible again. Some severe storms could fire in west Texas. The northern Plains and upper Midwest will be clear and cool.
East: Most of the eastern third of the nation will see clear skies on Wednesday. Temperatures will range from the cool 60s and 70s in the Northeast and Mid-Atlantic to the blazing hot 80s and 90s in the Southeast and Florida.
West: Very light snow is likely in the highest elevations of Wyoming and Colorado. Some showers and thunderstorms should dampen portions of the Northwest and Great Basin.
Weather history for May 20: In 1894, a record late snowstorm dumped up to 10 inches on parts of Kentucky, Tennessee and Virginia. In 1957, a tornado hit the Midwest, killing 48 people. It ended its 71-mile track near Kansas City.
In 1996, Patuxent River, Md., soared to a record high of 100 degrees.