Article updated: 2/21/2013 9:25 PM

Snow forecast drops slightly, but still a messy morning expected

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A car is stuck in a ditch after spuning out on Interstate 70 East near Lake Saint Louis, Mo., on Thursday. Blinding snow, at times accompanied by thunder and lightning, bombarded much of the nation's midsection Thursday, causing whiteout conditions, making major roadways all but impassable and shutting down schools and state legislatures. Freezing rain and sleet were forecast for southern Missouri, southern Illinois and Arkansas.

Associated Press

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The National Weather Service has issued a winter weather advisory for the Chicago area due to a snowstorm blowing up from the south that is capable of dumping up to 6 inches of snow overnight.

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The National Weather service dropped its expected snowfall total for tonight and tomorrow a little bit, but a winter advisory is still in effect. It says the storm might drop 5 inches of snow in some spots, but more like 3 inches on average. Wind and ice might be the bigger problems, especially for the morning rush. And there could be a period of heavy snowfall in a short period of time.