I don't think I was that far off the mark. So far the departure at BWI is +6.7... Not as hot as March 2012 (+10.1), but certainly much hotter than March 2010 (+4.9). We're still in the running for a top ten hottest March (currently tied for 8th).
So both record highs did get broken. Record high min today is probably going to be broken too- it was 57 overnight, the record is 56 so as long as we hold it until midnight we're good.