Lake Effect Snow effects most of the U.S.

The lake-effect snow machine will continue to provide the Great Lakes with several more inches of snow today and tonight. Additional snow will also fall on Tuesday. Moisture moving onshore in the northwestern U.S. will lead to more mountain snow, although snow levels will be high, some places could still receive several inches.

Cold air continues to pour over the Great Lakes today and tonight. This will lead to more snow downwind of the lakes. Generally the "sweet" spots will have 3-6 inches, but locally there could be as much as 10 inches where the bands are persistent. The most prominent regions to receive this snowfall will be the usual suspects in northern Indiana, southwestern Michigan, the Upper Peninsula and northern lower Michigan, northeastern Ohio, northwestern Pennsylvania, western New York and central New York.

The snow levels in the northern Cascades will start the day at 6,000 feet and fall to just 5,000 feet tonight. This will stay well above the normal passes. The northern Rockies will receive this same moisture with snow levels at or below pass level. This will lead to as much as a new foot of snow over the Idaho Panhandle. Even the Bitterroots will have 3-6 inches.

Tuesday will once again continue the lake-effect snowfall with several more inches possible. Farther west, there will be more snow through the Rockies and breaking out into the Plains. This snow will spread through Montana and eventually the Dakotas. This snow will arrive amid a strong storm system. This system will spread another round of arctic air southward through the Plains on Wednesday into Thursday.

Info from Accuweather.com 01/04/2010

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