Beneath the unyielding grip of a fierce winter, Southern California is experiencing a notable temperature drop and an onslaught of adverse weather conditions. According to the National Weather Service San Diego, coastal regions are enduring mid-50s while the valleys face mid-40s to mid-50s. In a revealing nod to the chill, mountainous areas from 4500 to 7000 feet are grappling with mid-20s to mid-30s Fahrenheit.