Based on the nightly run of weather models, looks like BOS may get slammed, too. They were previously seeing 2" or less snow, with winds and flooding from storm surge and the full moon at high tide, but the models I saw this evening hit them with 20+ inches as the low pressure area looks to track just right to crush them as well.

Also based on the nightly runs, if they turn out accurate at all, I suspect IAD/DCA/BWI will be shut down completely through late Sunday, with limited recovery starting Monday. Several models have upped the snow totals significantly.