5 Things You Need to Know About the Great Lakes 'Snow Tsunami' That Just Hit
- A freakish winter storm known as a 'snow tsunami' slammed into the shoreline of Lake Michigan, creating 10-foot waves of ice and slush that flooded lakeside homes and buried cars in seconds, leaving residents stunned by the sudden wall of white.
- The event was triggered by a massive temperature inversion over the great lakes, where an arctic air mass collided with exceptionally warm lake water (still in the 40s from a mild autumn), causing explosive moisture release and rapid ice formation on the coast.
- This rare phenomenon, officially called a 'seiche-induced ice shove,' happens in less than 1% of great lakes storms, and meteorologists say the scale of this event—impacting over 30 miles of coastline—is unprecedented in modern records for Lake Michigan.
- Emergency crews were overwhelmed as the ice surge cut off roads, snapped power lines, and collapsed a century-old dock in Milwaukee Harbor; officials are warning that a second wave could hit within 48 hours as wind patterns shift over the great lakes.
- Experts predict this 'snow tsunami' could become more common due to climate change, as warmer surface temps on the great lakes during late fall create more energy for explosive winter weather events, turning ordinary snowstorms into coastal catastrophes.