Does lake effect snow happen downwind?

The water molecules in these clouds freeze and are eventually deposited downwind, on the leeward side of these lakes as snow and other types of winter precipitation. Lake effect snow occurrence and location is mainly dependent on wind (speed and direction) and topography.



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Anywhere! Lake effect snow can occur over any unfrozen body of water where the fetch is long enough to gather enough moisture to create snow. Lake effect snow can occur over Lake Tahoe, the Great Salt Lake, the finger lakes, and even has been reported over rivers in the Midwest!

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The lower layer of air, heated by the lake water, picks up water vapor from the lake and rises through colder air. The vapor then freezes and is deposited on the leeward (downwind) shores.

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Lake-effect snow can form on small lakes just as it does in the Great Lakes. Salt Lake City, Fort Worth and Carson City, Nevada have all had bouts of snow from lakes. Inland lake-effect and ocean-effect doesn't just occur in the United States.

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Lake effect snows are common downwind of the Great Lakes in the United States and Canada, the Great Salt Lake in Utah, and in parts of Scandinavia, Korea, and Japan.

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This storm was the result of a phenomenon called “lake effect snow.” It's one of the main reasons why areas near big lakes, like the Great Lakes, get such remarkable snowstorms. Such storms usually occur between November and February, not October.

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Lake-effect snow is a frequent contributor to our seasonal snowfall in Chicago and with Lake Michigan almost ice free, the lake-effect snow machine is open for business provided a cold wind is blowing in our favor in the right direction. Nearly 93% of the Great Lakes does not have significant ice cover.

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Lake-effect snowstorms can produce 0.3- 1.5 meters (1-5 feet) of snow in single extreme events and can continues for days. The great Lake snow belts cover the lake shores and about 50-80 km (30-50 miles) inland before most of the lake-supplied moisture is removed by precipitation.

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