CHARLESTON, S.C. (WCSC) – Cold Arctic high pressure is building into the Southeast erasing away the brief warm up that we enjoyed on Monday. Despite sunny skies today, highs will only reach the upper 40s this afternoon. Get ready for a very cold night tonight with lows dropping into the low to mid 20s inland, low 30s at the beaches. Cold weather will stick around for the rest of the work week with highs in the 40s and low 50s. Morning lows will be in the 20s through Friday morning.