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Extreme Heat and Excessive Rainfall This Week

A significant heat wave continues for the Rockies, Northern Plains, and Great Lakes into the Mid-Atlantic, peaking in intensity through midweek and lingering across parts of the Northern Plains and Midwest until this weekend. Excessive rainfall my bring life-threatening and locally catastrophic flash and urban flooding across portions of southwestern Texas through early Friday. Read More >

Overview

Several severe thunderstorms developed across much of eastern Iowa and northeast Missouri into portions of northwest Illinois on the evening of May 6, 2023.

An initial supercell developed across northwest Missouri during the early afternoon hours from the remnants of morning storms to the west. This storm moved across much of the state, producing a tornado along its track. North of this storm, the strengthening low-level jet helped to fire additional showers and thunderstorms, mainly along and south of Interstate 80. Storms mainly produce hailed around half an inch to one inch (quarter size), with one storm in particular in eastern Van Buren County producing hail up to golf ball size. Through the evening, storms merged and weakened in intensity, but not before producing some wind damage across northern and central Lee County.

Heavy rain also fell from storms as some remained stationary for long periods of time. Most notably, locations north and east of Fairfield, IA recorded over two inches of rain.


WPC Surface Analysis May 6, 2023

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