National Weather Service United States Department of Commerce


***Updated to add 4th tornado***


Low pressure deepened northeast into the Great Lakes region late February 28th into early March 1st, 2017. Strong deep layer forcing with this feature and the overspreading of leading (unstable) warm sector forced several episodes of strong to severe convection during this time. The first line segment impacted areas along and north of the toll road in Indiana and Lower Michigan during the early evening produced pockets of large hail and damaging winds. There were also 4 EF1 tornadoes surveyed across Berrien, Cass and St. Joseph Counties in Michigan. A second line of storms moved through the rest of northern Indiana and portions of northwest Ohio during the early morning hours of March 1st. There were numerous hail and damaging wind reports with this line, especially across northeast Indiana with a more pronounced bowing segment. 


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