The storms can be on the stronger side with damaging winds and flash flooding from the eastern Great Lakes to the Appalachians. Drier, less humid air will pour in behind the storms across the Midwest.
Meanwhile, a brewing tropical system in the central Gulf of Mexico is expected to enhance downpours along part of the Gulf coast. More typical summertime showers and thunderstorms will be scattered about the balance of the South.
Only a few storms will dot the Rockies and southern High Plains. Mainly dry weather will accompany typical summertime heat in the Southwest, while showers dampen western Washington.
National High Wednesday 109 at Thermal, CA
National Low Wednesday 29 at Angel Fire, NM