A significant nor'easter is forecasted to impact the Mid-Atlantic and Northeast regions, bringing heavy snow and strong winds. The storm is anticipated to develop off the Mid-Atlantic coast on Sunday, potentially resulting in substantial snowfall accumulations, measured in inches or even feet. The peak impact is expected across the Northeast on Sunday night and Monday. The National Oceanic and Atmospheric Administration (NOAA) has indicated the potential for substantial snowfall through its Global Forecast System (GFS) model, although it is considered an outlier compared to other weather models. Residents are urged to stay informed and heed warnings from local authorities.