The National Weather Service in Jacksonville, FL issued a Cold Weather Advisory early this morning effective from 4 AM to 9 AM EST, warning residents of Coastal Duval, Eastern Clay, and South Central Duval Counties to brace for particularly chilly conditions. The advisory emphasizes the risk of very cold wind chills, dropping as low as 23 degrees. “The cold wind chills as low as 25 degrees could result in hypothermia or frostbite if precautions are not taken,” the NWS cautions, stressing the seriousness of the advisory.