- Roughly 60% of the U.S. population as of Sunday night was under some form of winter weather advisory or warning.
- The hundred of flight cancellations that started Friday continued Christmas Day after a bomb cyclone — in which atmospheric pressure drops very quickly in a strong storm — developed near the Great Lakes, spawning blizzard conditions that included strong winds and heavy snow.
- Buffalo was hit hard, with New York Gov. Kathy Hochul calling the storm “the most devastating” in city history.
- Seven of those dead were reportedly in Buffalo, on the eastern edge of Lake Erie.
