In addition to UA934 mentioned above
UA78 NRT-EWR 789 diverted to IAD due to weather. Flight arrived at EWR 7 hrs 57 mins late.
UA237 PMI-EWR 764 cancelled due to maintenance after a 2 hr 20 min delay.
UA249 TFS-EWR 752 diverted to BOS due to weather. Flight arrived at EWR 20 hrs 44 mins late.
UA272 EWR-NCE 763 cancelled due to maintenance.
UA273 NCE-EWR 763 cancelled due to maintenance after a 4 hr 5 min delay.
UA618 EWR-BRU 763 (usually 752) cancelled due to maintenance. Return UA619 BRU-EWR on 8/3 cancelled as a result.
UA912 ORD-KEF 752 cancelled due to maintenance after an anticipated 3 hour delay. Return UA913 KEF-ORD on 8/3 cancelled as a result. This is the 2nd day in a row this flight has been cancelled.