What is Bombogenesis – Michigan’s Strangest Weather Phenomenon
Michigan weather can change at a moment's notice, we all know that. And when the weather changes very rapidly, that's a specific weather phenomenon known as bombogenesis.
What is Bombogenesis
Bombogenesis, according to Weather.com is a rapidly developing low pressure system.
To be classified as a weather bomb, or having undergone bombogenesis or "bombing-out", the central pressure of a low pressure system must drop at least 24 millibars within 24 hours.
Bombogenesis results when there is a large temperature gradient, usually between a cold continental air mass and warm sea-surface temperatures. However, it can also be the product of a cold polar air mass and much warmer air from the south, say, over the Plains states.
That was the specific weather system that occurred over northern Michigan today (October 24). That weather system caused
Winds near the Lake Superior shoreline gusted to over 60 mph Tuesday morning and downed trees and powerlines in over two dozen locations in Alger, Marquette and Schoolcraft counties.
Wind instruments about 115 feet above the lake surface at Stannard Rock Lighthouse, about 40 miles north-northeast of Marquette, Michigan, measured a wind gust of 77 mph Tuesday morning.
The waves generated by this weather system, according to M-Live reached as high as a three-story building along some parts of the Lake Superior shoreline.
Farther east the buoy located northeast of Munising, MI just recorded the highest wave any Great Lakes buoy has tallied. Some of the buoys have been in the Great Lakes for 30 years.