Forget the ocean. Lake Michigan just served up the kind of surf report you’d expect from a major swell event in the Pacific.
A powerful October storm turned the freshwater lake into chaos, blasting lighthouses and shorelines with enormous waves. Footage circulating on Instagram and YouTube shows the extraordinary spectacle.
And those reports of 20-foot waves? They’re not just social-media hype.
In its October 16 forecast, the National Weather Service predicted waves of 15 to 20 feet across southern Lake Michigan, with occasional individual waves reaching 26 feet.
Northerly winds were forecast to reach 45 knots—roughly 52 mph—as low pressure moved east of the Great Lakes and strong high pressure built to the west.
There’s an important distinction: these were forecast heights, not independently verified measurements. The NWS defines significant wave height as “the average of the highest 1/3” of waves, while the larger figures represent occasional higher seas.
Still, the scenes were outrageous.
At South Haven, Michigan, footage recorded October 16 showed wind tearing spray off the waves around a lighthouse. One published video description described a “massive amount of spindrift” and estimated local waves at 10 to 18 feet.
Farther south, drone footage captured waves smashing against the St. Joseph lighthouse and adjacent pier.
Related: Humungous Wave Slams 46-Foot Lighthouse on Great Lakes (Video)
Captain Jenna Topovsich of the Michigan City Fire Department warned the public about “sneaker waves,” which unpredictably surge much farther up the pier than preceding waves.
“Once someone goes in, there is no stopping it,” rescue officials emphasized, adding that in such extreme conditions, rescuers cannot safely follow; they can only throw a life ring and hope it lands close enough to grab.
At New Buffalo, where gusts reached around 40 mph and waves reportedly climbed to 10 feet, onlookers showed up for the spectacle.
“We came here just to see how crazy the lake is,” beachgoer Michael Conrad told ABC57.
Unlike ocean swells, Great Lakes waves don’t need distant storms. Powerful winds blowing across a long, uninterrupted stretch of water—known as fetch—can build steep, closely spaced waves surprisingly quickly.
And yes, people surf these freshwater monsters. Great Lakes surfing has a dedicated following, especially during fall and winter storms.
But the NWS warned that hazardous conditions could capsize boats and urged mariners to remain in port.
For a few days, Lake Michigan looked less like a lake and more like an angry inland sea.
Related: Massive Waves ‘Over 30ft’ Slam the Great Lakes (Video)
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