Id say Feb 13 was <24 hrs, it was pretty close.. 23hrs based on the BDR obs. And the majority accumulated in 12 hrs. Same with Jan 2011 that was <18hrs i believe, maybe even 12. While that wasn't 3 feet, we pulled 30" in that short amount of time. But i do agree for the most the really big ones like Mar 2001 and Jan 2005 for E MA are +24hrs