National Weather Service United States Department of Commerce

Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Central U.S. and Northeast; Critical Fire Weather in the Four Corners

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Severe thunderstorms are forecast from parts of the central High Plains into the Upper Midwest, and across parts of the Northeast. Critical fire weather conditions will continue across portions of the Four Corners and Great Basin. Read More >

The dangerous stretch of heat and humidity will continue through Thursday and possibly through Friday. Storms are expected at times, mainly northwest of Madison early Wednesday and early Thursday, with increasing chances for the holiday weekend. Stay cool and keep up with the forecast.
An Extreme Heat Warning remains in effect through 7 PM CDT Wednesday for continued high temperatures and humidity. Heat impacts are expected to be significant due to the prolonged nature of this heat event.
Showers are thunderstorms will be focused over central WI overnight into Wednesday but may clip areas northwest of a line from Lone Rock to Fond du Lac early Wednesday morning. Isolated strong to severe storms are possible with hail and gusty winds.