National Weather Service United States Department of Commerce


A line of severe thunderstorms initially developed over southeast Iowa on the morning of June 28th, 2018. A moist and unstable airmass out ahead of these storms allowed them to strengthen as they moved southeast, reaching peak intensity as they moved through portions of the northern and eastern St. Louis metro area and western Illinois. Significant and fairly widespread wind damage occurred from these storms Thursday afternoon into Thursday evening, with even a weak tornado hitting near Elsah, IL.
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