Marine Thunderstorm Wind · Lake Michigan

Numerous thunderstorms developed during the early morning hours of June 21st, producing mainly damaging winds. A couple thunderstorms moved out over the Wisconsin nearshore waters and open waters between 0600CST and 0800CST and produced wind gusts between 38 and 52 knots. Synoptically, thunderstorms developed along a warm front that extended from northeast Iowa, into southern Wisconsin and across Lake Michigan into Lower Michigan. A layer of drier air aloft contributed to the cause for wind damaging thunderstorms.