Portions of Wisconsin got hammered with rain overnight on June 28-29. Here is the 12-hour radar estimated totals ending at 5 a.m. The National Weather Service out of Duluth said the weather system resulted from an "MCV spinning just west of Duluth." An MCV is a mesovortice or a mesoscale convective vortex, a low pressure area with circling vortex of wind.
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