Arctic cold front arrives Thursday night in New Orleans and the temperatures will plummet! An Arctic air mass is forecast to bring hazardous conditions to the Gulf South, including southeast Louisiana and Mississippi starting late Thursday night and continuing through Christmas Day. According to the National Weather Service in New Orleans, the cold front is expected to move through the region during the evening hours on Thursday, with temperatures dropping as much as 30 degrees in just a few hours. Temperatures will continue to plummet through the early morning hours, with almost the entire area below freezing around sunrise. The air mass will bring extreme cold, strong and possibly damaging winds, dangerous wind chills, and hazardous driving conditions due to wind.