Great Lakes Mesoscale convective complexs or MCCs can cause damage to wide swaths of forest and shatter glass in city buildings. These storms mainly occur during the night, and the systems sometimes have small embedded tornadoes, but more often straight-line winds accompanied by intense lightning. Historically, the Great Lakes, in addition to their lake ecology, were surrounded by various forest ecoregions (except in a relatively small area of southeast Lake Michigan where savanna or prairie occasionally intruded). Logging, urbanization, and agriculture uses have changed that relationship. In the early 21st century, Lake Superior's shores are 91% forested, Lake Huron 68%, Lake Ontario
Little League World Series (Great Lakes Region) Lakes Region has a unique definition that does not correspond with the normally understood definition of the "Great Lakes" area, even when the context is restricted to the U.S. Although eight U.S. states (and the Canadian province of Ontario) border on the Great Lakes, only five of the U.S. states are in Little League's Great Lakes Region: One state that does not border any of the Great Lakes, and in fact has no territory within the Great Lakes watershed, is included in this region: Two states that border on the Great Lakes, New York and Pennsylvania are part of the