New Year's Eve will be snowy in Central US while rain is forecast on Eastern Seaboard By Allison Chinchar, CNN meteorologist Updated 5:41 PM ET, Sun December 27, 2020 (CNN)As we toss 2020 to the wayside and welcome 2021 with open arms, a significant winter storm is expected to develop in the Central US this week. But the first area of concern is a storm in the Western US on Sunday and Monday. This system will bring the first significant snowfall of the season to the mountainous regions of Southern California. Rain will be the biggest worry for the valley and coastal locations. While the rain is needed in several of these drought-stricken areas, some of the rainfall will be quite heavy at times, with even a few thunderstorms possible. This could trigger urban roadway flooding and possible isolated debris flows from recent burn scar areas.