Lake effect snow

Lake effect snow is when cold air blows over a lake and the warm that the lake is holding right above the water holds a lot of water vapor. When the cold wind blows over the lake it takes with nit the water vapor, but when the wind is no longer above the lake with all the warm air to help it hold the water vapor it has to release it. When releasing the water vapor it turns into little ice crystals which forms into snow. For example this recently occurred in Buffalo a few weeks ago when a lot of cold air went over Lake Erie. Once the cold air was no longer above the lake it released all the water vapor into snow which led to 70 inches of snow in just a week.