National Weather Service United States Department of Commerce

Critical Fire Weather Threats and Dangerous Heat Continue Across the West

Dangerously hot temperatures will continue early this week over the Desert Southwest, with critical fire weather threats from the same region northward into the Great Basin. Further north, severe thunderstorms will be possible across the northern Rockies and Plains today, expanding into the Upper Midwest on Tuesday. Read More >

Overview

A strong, slow-moving low pressure system drifted southeast across the upper Midwest over a 3-day period from Sunday May 17 through early Tuesday May 19.  This system interacted with copious moisture streaming north from the Gulf of Mexico that resulted in several rounds of moderate to heavy rainfall from Wisconsin, northern Illinois and Lower Michigan.  Widespread rainfall amounts of 3-5 inches fell across much of east-central and northeast Wisconsin with a few locations breaking daily rainfall totals. The heavy rainfall was also accompanied by strong northeast winds gusting to 40 to 50 mph.  The combination of heavy rainfall, high Lake Michigan water levels and northeast winds, led to widespread flooding and beach erosion at shoreline areas along the Bay of Green Bay and Lake Michigan. The strong northeast winds hindered the drainage of water from the Fox and East Rivers into the mouth of the bay, which contributed to flooding in parts of downtown Green Bay and further inland along the East River. Significant flooding was also observed in the city of Oconto along the Oconto River.

With Lake Michigan remaining near record levels, eastern Wisconsin will continue to be vulnerable to flooding as we move into the summer months.

Preliminary 3-Day Storm Total Rainfall

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