I planned a Mileage Run SFO/IAD/SJU/EWR/SFO, leaving Saturday night and returning Sunday night. My 10:35 pm flight was delayed in SFO, so I went into the United Club. Just as I was entering, they were making an announcement that there were some East Coast airports closing as 12 Noon Sunday. That anyone flying the red eye's (to EWR/JFK/IAD) are fine.
I was very lucky that my flight was delayed, otherwise I would have been on the IAD redeye flight and likely would be stranded in either IAD or SJU.