.A Pacific storm system pushing into the West Coast will bring locallyheavy rain near the coast, and heavy high elevation snowfall into theIntermountain West over the next couple of days...  Hard hitting storm system to produce accumulating snowfall across theGreat Lakes today and into the Interior Northeast Thursday night andFriday morning..Next round of snow expected to quickly spread from the central Plainsand Ohio Valley on Friday, then into the Central Appalachians andMid-Atlantic Friday night into Saturday morning...A Pacific storm system is ushering in a stream of precipitation into theWest Coast and Intermountain West the next couple days. Meanwhile, asufficiently cold air-mass anchored in place by high pressure oversouthwest Canada will force a frontal boundary to remain stationary overthe central and northern Rockies through Friday. Coastal areas of thePacific Northwest and the valleys of the Intermountain West can expectperiods of rain, while mountain ranges such as the Oregon Cascades, theOlympics in western Washington, and on east into the heart of the NorthernRockies witness heavy snow today. To the east, a low pressure system tracking through the Great Lakes todayis generating showers to the south of its track, while a swath ofmoderate-to-heavy snow envelopes southern Wisconsin and northern Michigan.This storm system is quite progressive, quickly finding itself trackingover Lake Ontario by Thursday evening. Showers are likely in the centralAppalachians, while periods of snow ensue over the Interior Northeast. ByThursday night, northwesterly winds escorting in a cold, Canadian air-masswill rush over the Great Lakes and trigger lake effect snow showersdownwind of Lakes Erie and Ontario Thursday night and linger into the dayon Friday. Snow showers will linger across parts of New England on Friday,but gradually dissipate as the storm tracks farther into the northwestAtlantic. In total, over 6 inches of snow is expect in parts of theMichigan U.P., the northern half of Michigan's Mitten, and across northernNew York. More specifically, the Tug Hill Plateau and neighboringlocations could see over a foot of snow by the time snow concludes Fridaymorning. In addition, gusty winds are also an impact from this stormsystem, as evident by the Wind Advisories in place over northern Ohio fortoday and both western and the Southern Tier of New York between Thursdayafternoon and Friday morning.By Thursday night, a new wave of low pressure will be taking shape overthe Central Plains with a swath of moderate-to-heavy snow setting up overnorthern Nebraska and southern South Dakota. The storm tracks quickly intothe mid-Mississippi river Valley by late Friday morning with periodsanticipated across northern Missouri and central Illinois, while rainshowers and isolated thunderstorms make for a damp day from the ArkLaTexon east into the Tennessee Valley by Friday afternoon. By Friday night,the storm will restrengthen as it reaches the Mid-Atlantic with an axis ofmoderate-to-heavy snow bringing light snowfall accumulations to the OhioValley Friday evening, then over the northern Mid-Atlantic Friday nightinto early Saturday morning. The Potomac Highlands of West Virginia andAllegheny Mountains from western Maryland to south-central Pennsylvaniahave the best chances of seeing snowfall totals surpass 4 inches Fridaynight, but anywhere from 1-3" of snow is possible from the mid-MississippiValley on Friday and the Ohio Valley Friday evening, to the DC/Baltimoremetro areas on north to the Philadelphia metro area early Saturdaymorning. Some hazardous travel is possible in portions of these regions,particularly on untreated roads Friday night into Saturday