In New Orleans, temperatures dropped to 20F (-6.7C) at Louis Armstrong International Airport, breaking the old record low of 23F (-5C) set on Jan. 17, 1977.
And the mercury at Baton Rouge Metro Airport plunged to 14F (-10C), beating the old record low of 18F (-7.8C) set in 1977.
It was also the coldest temperature recorded on any day in Baton Rouge since Dec. 24, 1989.