Regional Severe Weather
Great Lakes Severe Weather Guide: Lake Breezes, Derechos, Snow Squalls, and Waterspouts
How the Great Lakes shape severe weather, including lake breezes, storm boundaries, derechos, snow squalls, lake-effect snow, and waterspouts.
Quick answer: The Great Lakes modify weather by changing temperature, wind, moisture, boundaries, snow bands, and shoreline storm behavior.
Warm season
Lake breezes can cool shorelines, shift winds, or help focus thunderstorms.
Storms can strengthen or weaken around lake-influenced boundaries.
Wind storms
Derechos and severe squall lines can cross Great Lakes states with damaging wind.
Marine conditions can become dangerous quickly.
Cold season
Lake-effect snow and snow squalls can create sharp visibility and road changes.
A few miles can separate clear skies from heavy snow.