Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 400 PM EDT Sat Oct 31 2020 Valid 00Z Sun Nov 01 2020 - 00Z Tue Nov 03 2020 ...Rain and snow from Great Lakes to Northeast... ...Cold air shifts into East from Mid-west while West experiences a warm up... An area of low pressure is forecast to traverse southeastern Canada over the next couple of days. This system will produce light rain and snow across the Upper Great Lakes tonight. Rain and snow moves east into Lower Great Lakes and Northeast tomorrow and Monday as upper-level trough deepens. Some areas down-wind of lakes Eerie and Ontario may see enhanced lake effect snow, while parts of the Northern Appalachians may see terrain enhanced snowfall as well Sunday and Monday. The Mid-Atlantic may see increased rain rates, and the potential for scattered thunderstorm activity across North Carolina's coastal plain as a weak area of low pressure develops over Maryland's eastern shore. This area of low pressure will eventually link up with the dominant Canadian system on Monday and continue on through the Northeast and eventually into the Gulf of St. Lawrence by Monday night. An upper-level ridge, currently stationed over the Rockies, will shift eastward pulling cold air south and into the Mid-west tomorrow. This cold air mass is likely to drop temperatures up to 20 degrees below average over parts of the Mid-west. Sunday night lows are not expected to be much better as lows are likely to be in the low 30s across much of the Mississippi/Tennessee Valleys. The cold air will shift east on Monday leading to the potential for many places along the East Coast breaking high temperature records. Kebede Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php