We flew during a Snowmageddon a few years back, right after the holidays. We went out about 5 days after the snow stopped, so our flight operated as scheduled. But the woman next to us was on a flight cancelled during the storm. She had spent the last 5 days trying to get home. So if your flight operates as scheduled, no big deal, but if it gets cancelled, you may need to get creative.
Snowmageddon also made it difficult because ALL planes in the northeast were grounded. Delta has the option of getting at least some people onto other carriers, or flying more planes than intended in the next few days. Not sure they would do either, but they have the option. I wouldn't be too worried unless it gets towards Friday and they're still experiencing massive delays.