As a large heat dome builds from the Great Lakes to the northeastern United States and southeastern Canada, rounds of heavy downpours will increase the risk of dangerous flash flooding from parts of the Plains to the Upper Midwest through early this week.

Inches of rain have already occurred within heavy downpours in a corridor from Kansas to Wisconsin. Significant ponding may occur on portions of major highways, segments of Interstates 35, 70, 80 and 90, causing blocked lanes and full stoppages in some areas.

Saturday night into Sunday morning, training heavy thunderstorms over the Milwaukee metro area produced significant flooding. Rainfall totals as of Sunday morning are in the 5-7 inch range, with more expected to come.

Rainfall rates will vary with each round but can reach 1 to 3

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