Tidal Wave warning system (Aug 7)
An experimental warning system is being installed around some of the Great Lakes. This warning system will try to predict Great Lakes 'tidal waves', also called meteotsunamis.
A meteotsunami is a wave generated by the wind force of a severe thunderstorm. As a severe wind gust pushes out from a thunderstorm over the Great Lakes, it can get force behind a wave. The wave builds in size, and can be significantly higher than other waves at the time.
Some of these large waves have even come onshore and killed people along the Great Lakes shoreline. There have been killer meteotsunamis at Chicago, Holland, MI and Grand Haven, MI.
https://www.mlive.com/weather/index.ssf/2018/08/tidal_wave_warning_system_for.html