A winter storm blasting through the north-central U.S. this morning will bring upwards of a foot of snow from the Dakotas eastward to the upper Great Lakes with pockets of heavier amounts also possible.
Conditions are also ripe for a swath of freezing rain and sleet, with significant ice accumulations possible from central Wisconsin across southern Ontario and into the upper Mid-Atlantic/lower New England. Ahead of the advancing cold front, strong thunderstorms are expected over the Tennessee/Ohio Valleys.
A strong cold front will move through the complex terrain of the West over the next several days. An abundance of Pacific moisture advancing inland by a sustained low-level onshore flow will lead to orographically enhanced snow over much of the western U.S. mountain ranges. The heaviest amounts are forecast to be across the Sierra Nevada, Shasta Mountains, and Oregon Cascades where up to 2 feet of snow will be possible through Friday morning.
Over the next several days, a major winter storm will bring snow totals ranging from 8 to 14 inches from the Northern Plains into the upper Great Lakes, with isolated pockets of higher amounts. Significant icing is possible in central Minnesota into the lower Great Lakes. Farther to the east, snow will begin accumulating across New England on wednesday afternoon with amounts approaching a foot from upstate New York to interior New England.
In addition, significant icing is possible immediately south of the heavy snow area. In the West, a strong frontal system combined with ample Pacific moisture will bring up to 2 feet of snow across the Sierra Nevada, Shasta Mountains, and Oregon Cascades through Friday morning.
There is a moderate risk of severe thunderstorms today over parts of the Tennessee Valley and southern Appalachians. Surrounding this area is a slight risk for severe thunderstorms from the lower Mississippi Valley into the Ohio Valley, Virginia and the Carolinas. Yesterday, over 160 reports of severe weather were received including 13 tornadoes in Missouri, Illinois, Kansas and Nebraska. The emergency manager of Cape Giradeau County, Missouri is reporting widespread damage across the northern third of the county along with one person injured. Near Marquand (Madison County), Missouri another injury was reported where three homes were damaged. Three injuries were reported by the emergency manager of Labette County Kansas where three trailers were blown over.