URGENT - WINTER WEATHER MESSAGE National Weather Service Chicago IL 1227 PM CST Thu Feb 8 2018 ...Long Duration Snow Event Likely This Evening through Friday Evening... Including the cities of Rockford, Belvidere, Woodstock, Oregon, Dixon, DeKalb, Aurora, Elgin, Ottawa, Oswego, and Morris 1227 PM CST Thu Feb 8 2018 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 6 PM CST FRIDAY... * WHAT...Heavy snow expected. Travel will be very difficult to impossible at times, including during the morning commute on Friday. Total snow accumulations of 7 to 12 inches, with localized higher amounts are expected. * WHERE...Portions of north central and northeast Illinois. * WHEN...From 6 PM this evening to 6 PM CST Friday. * ADDITIONAL DETAILS...Be prepared for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions are expected. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency.
A few flurries are possible early in the day but the main story is a winter storm that will impact the region beginning late this afternoon or early evening and continue well into the day Friday. Expect heaviest snowfall to occur just north of the I-80 corridor up to the Wisconsin state line where 6-10 inches will be possible, along with some localized amounts over a foot. Snowfall will be heavy at times overnight into Friday morning with rates topping 1 inch per hour. Snow should be just beginning during the Thursday evening commute, but there will be significant impacts to the Friday morning commute, and snow will likely affect the Friday evening commute as well. Confidence in the snow amounts along the I-80 corridor and areas south remains low as there will likely be a sharp cut-off in amounts. A slight southward shift in the system may require additional headlines in farther south, so stay tuned to forecast updates throughout the day.