National Weather Service United States Department of Commerce

Heat Wave Expands to the East Coast; Flash Flooding Likely in the Central Plains into the Midwest; Severe Thunderstorms in the Northeast

Dangerous, prolonged heat is ongoing in the Mid-South to Mid-Mississippi Valley and heat expands into the Northeast for a brief period today. Widely scattered instances of flash flooding due to heavy rains are forecast from northeast Kansas to much of Indiana. Scattered strong to severe thunderstorms are possible across parts of New England, northern Mid-Atlantic, and North Dakota. Read More >

Additional storms will develop this evening and especially overnight. With such a humid airmass in place, any storm will produce torrential rain rates with a threat for flash flooding. If you live in a flood prone area, ensure you have multiple ways to get warnings tonight including at least one that will wake you up.
After a stormy night, additional storms are expected tomorrow afternoon primarily along and south of I-80. A few storms may be severe with flash flooding and damaging winds.
Periodic storms will prevail tonight into Saturday before heat and humidity recharges for early next week. Periodic storms may occur again at some point next week, as well.