URGENT - WINTER WEATHER MESSAGE National Weather Service Cleveland OH 1010 AM EST Sun Dec 24 2017 ...Snow to bring slick travel conditions to much of the area for today and tonight. Periods of heavy lake effect snow to develop for the first half of the week... .A developing storm system across the Ohio Valley will bring widespread snow to the area today and tonight. The initial area of snow will develop across northwest Ohio by midday and will spread across the rest of the area going into the evening hours. An extended period of conditions favorable for moderate to heavy lake effect snowfall is possible from Monday afternoon through Wednesday. The area that will be most impacted will be Erie County Pennsylvania. PAZ001-002-242315- /O.CON.KCLE.LE.W.0008.171224T2100Z-171227T2100Z/ Northern Erie-Southern Erie- Including the cities of Erie and Edinboro 1010 AM EST Sun Dec 24 2017 ...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT FROM 4 PM THIS AFTERNOON TO 4 PM EST WEDNESDAY... * WHAT...Snow expected. A widespread 3 to 6 inches is expected through Monday morning from a system moving across the Upper Ohio Valley. Lake effect snow with additional accumulations of 8 to 12 inches are expected from Monday afternoon through Tuesday. Additional lake effect snow is possible into Wednesday. West winds will gust as high as 40 MPH Monday. Wind chills will be in the single digits Monday and near zero Tuesday and Wednesday. * WHERE...Erie County Pennsylvania. * WHEN...From 4 PM this afternoon to 4 PM EST Wednesday. Widespread snow will intensify after 8 PM tonight and continue into Monday morning. A break is possible in snowfall midday Monday before intensifying late Monday afternoon into Monday night. * ADDITIONAL DETAILS...Plan on slippery road conditions with travel becoming increasingly difficult Monday afternoon into Tuesday with heavy lake effect snow. Gusty winds will cause areas of blowing and drifting snow. Be prepared for rapid changes in visibility in heavy snow squalls.