Heavy snowfall is expected for a large portion of Iowa by tomorrow. A Winter Storm Warning is in effect for 30 counties, roughly the northeastern third of the state. Much of the rest of Iowa is under a Winter Weather Advisory. Weather Service meteorologist Jim Belles says the northern tier of counties will likely get between five and eight inches of snow, but he adds, most of Iowa will get some snow, with southwest Iowa getting the least. In addition to the potential for heavy snow, he says the expected strong winds are also a chief concern. Western Iowa may see the worst wind gusts, perhaps up to 50 miles an hour. Also, Belles says the new-fallen snow in combination with the strong winds could create treacherous travel conditions.Belles says northeast Iowa should get the deepest snow, though the storm system is still developing and could shift the heavier snowfall into or away from Iowa over the next several hours.Travel’s expected to get iffy quickly — consult iowa-road-conditions-dot-org before you take off or just dial 5-1-1.