National Weather Service United States Department of Commerce

Massive Heat Wave; Severe Storms and Heavy Rain

A massive heat wave is consuming much of the Midwest into the Southern tier of the U.S. with hazy, hot and humid conditions. These dangerous conditions will likely persist through Thursday as widespread excessive heat warnings and heat advisories are in effect. North and east of the heat and area of high pressure, thunderstorms with damaging and severe winds, large hail and heavy rain are likely. Read More >

Overview

Summary:

Numerous thunderstorms developed across northern Illinois, especially along the I-55 corridor, during the late morning on Thursday, March 14. These shifted east through the early afternoon into northwest Indiana. Several of these storms were supercells, and what meteorologists call "low-topped", in that they were not particularly deep as in late spring or summer. However, due to a potent weather system over the Plains, a very strong atmospheric wind field had enveloped the area helping storms to have a wind threat and rotate, bringing tornado potential. A brief EF-0 tornado occurred near Lowell, Indiana. In addition, very cold air aloft resulted in many storms having at least small hail, and a few bringing large hail. Strong non-thunderstorms winds then followed through the afternoon and evening.

Summary
Event Summary
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