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A deepening storm system will move from the southern plains through the Ohio valley later this week. This storm system will have the 3 ingredients necessary to produce a major snowstorm over the Midwest. These ingredients consists of copious amounts of Gulf moisture, deep low pressure and cold high pressure on the back side. This major storm system has Chicago in it's vicinity. Climatologically speaking, winter storms which result from the southern stream (like this one) that pass close to the Chicago area have a tendency to bring between 3 - 6 inches of snow to the Chicago area (6 - 12 inches in it's bullseye) with some of it falling as rain. There are many many exceptions to this. Currently the European computer model (as advertised on windy.com as of early Tuesday morning February 28th) brings 8 - 14 inches of snow snow into the Chicago area with Kenosha, Wisconsin in the true bullseye receiving 15 inches. The GFS model has Chicago receiving the most snow (and not Kenosha) with approximately 12 inches accumulation. National Weather Service warns us to be careful with guidance this far in advance. The Milwaukee National Weather Service has extra special interest in this storm as the models are now advertising a more northern track. Therefore in addition to Chicago, a major snowfall is currently projected to fall in Milwaukee according to the European model. This storm system will bring severe weather on the southeast side along with unseasonably warm air. A major snowfall is ongoing this morning in the New York and New England area with up to a foot of snow expected in some locations. Johnstown, New York can expect 5 to 10 inches today. The heavy snow will fall Friday afternoon with strong winds. This impactful storm will effect the east coast as well.