According to Environment Canada, the snow is expected to begin falling Wednesday and continue to Friday.
"Heavy snow (is) possible, with total snow accumulations of 6 inches or more over all of the watch area". It will be cloudy with a high near 23 degrees.
This is the first of several batches of accumulating snow between tonight and the weekend.
High temperatures could reach into the low to mid 30s, forecasts show. Chance of precipitation is 70 percent.
The highest ice accumulations will be in southern Pennsylvania, the Hudson Valley in NY and into southern New England. Parents and local media were notified by e-mail at 5:10 a.m. The warning is in effect for Elkhart, La Porte, Lagrange, St. Joseph and Steuben counties in IN from 8 p.m. Thursday until 11 p.m. Friday.
The Chicago area is bracing for the biggest snow storm of the season starting Thursday night. Wind chill values may drop down to -5° at times early Thursday morning. High 28F. Winds NNE at 10 to 15 miles per hour.
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ADDITIONAL DETAILS.Plan on hard travel conditions, including during the morning commute on Wednesday. Be prepared for reduced visibilities and hazardous travel conditions at times. During this snow event, visibilities will be reduced and roads will become snow covered.
A Winter Weather Advisory was issued for a large portion of the D.C. metro area.
Drivers are also encouraged to have winter emergency kit in the vehicle, in case of emergency on the side of the road.
Stay with FOX 47 for updates throughout the day and night on the snow and conditions.
United Airlines said on Twitter that waivers were in effect for snow-hit areas this week, allowing travelers to change flights without charges.
Residents are reminded that it is illegal to shovel or plow snow into the street or public right of way, and may be ticketed.