Complex sentence: In addition to the extreme cold wave at its most brutal in the Great Lakes, Mid-Atlantic, and New England, snowfall were reported as far south as Tupelo, Mississippi, Huntsville, Alabama, Shreveport, Louisiana, and Flagstaff, Arizona.
Split into simpler sentences: In addition to the extreme cold wave at its most brutal in the Great Lakes, Mid-Atlantic, and New England, even as far south as the Deep South could not escape the wintry nightmare. In fact, excessive snowfall were reported as far south as Tupelo, Mississippi, Huntsville, Alabama, Shreveport, Louisiana, and even Flagstaff, Arizona.