lordy! Now some sources are saying we 'could' get 30"

"Snowfalls of this magnitude — let alone two in one season — are rare in the area. According to the National Weather Service, Washington has gotten more than a foot of snow only 13 times since 1870. The heaviest on record was 28 inches in January 1922. But the biggest snowfall is believed to have occurred in 1772, before official records were kept, when as much as 3 feet fell in the Washington-Baltimore area. Both George Washington and Thomas Jefferson mentioned the event in their diaries, according to the weather service."