CAPE GIRARDEAU, MO (KFVS) - Light northeast breezes will bring a modest break in the heat Sunday, as a weak cold front settles just to the south of the Heartland. Sunday will likely be the first sub-90° day of the month for much of the area.
By Monday however, hot and humid air will begin to surge north and east back toward the Midwest. This will result in a potentially volatile pattern that could last for two or three days.
The Storm Prediction Center's latest outlook places a slight risk of severe thunderstorms over the Heartland for Monday and Tuesday. The pattern could potentially last into Wednesday as well.
A strong warm front at the surface combined with cooler northwest flow aloft will bring the necessary instability and wind shear for occasional strong thunderstorms with locally heavy downpours.
This pattern could begin as early as during the pre-dawn hours Monday morning .