From January 31 through February 1, a deep trough accompanied by cold air of −36°C or lower at the 500 hPa level is expected to move southeastward from the central to eastern US, while a surface low pressure system tracks northeastward along the US Atlantic coast. As a result, heavy snowfall is possible across the eastern US. As snowfall intensifies, strong winds may develop, raising concerns for deteriorating road conditions due to snow accumulation and icing, as well as significant visibility reductions. In Myrtle Beach, precipitation is expected to begin as rain and transition to snow; however, freezing rain (FZRA) or ice pellets (PL) remain possible depending on surface temperature trends. In Boston and Raleigh, precipitation is forecast to fall as snow from the onset. Please note that the timing, snowfall amounts, and precipitation type remain sensitive to the evolution of the upper-level trough, surface low, and thermal structure.