A swath of the nation will be dealing with duel weather threats early this week as high heat and heavy storms sweep across much of the Midwest, East and South.
The National Weather Service has issued a heat advisory for Chicago, St. Louis and much of the region, where heat and humidity will collaborate to push the temperature index near 110 degrees July 28. Blame a high pressure "dome" over the eastern part of the U.S. that is trapping the heat. The heat index measures how hot it actually feels when factoring for humidity.
But the weather service also published a hazardous weather outlook, saying storms could cause flooding and drive wind gusts of up to 60 mph.
A cold front continues moving south and eastward and will interact with increasing moisture and heat, creating an "immensely unstable atmosphere," AccuWeather warned.
"As thunderstorms initially develop in Montana and the Dakotas Monday afternoon, it is possible for storms to congeal into a powerful complex of thunderstorms," said AccuWeather meteorologist Brandon Buckingham.
