Waffle House locations across the South locked their doors in a rare move as a monster winter storm threatens much of the country this weekend — a stark warning of the havoc to come. The 24-hour Southern breakfast chain, famous for rarely closing in bad weather, shut down its griddles as locations in South Carolina, Tennessee, Georgia and Mississippi went into a “Code Red” Saturday as Winter Storm Fern barrels across the Midwest and East Coast, multiple outlets reported. In South Carolina —