On a different note, the last time a plane crashed into the Potomac, January 13, 1982 during a raging snowstorm. 74 perished =\
1981-82 had two periods of historic winter weather, one in January with a 3 day snowstorm and below zero cold right down to the coast and the second one came in April with a historic blizzard and a week of arctic cold and another snow event at the tail end of that.