January 19–20, 2025 nor'easter

The January 19–20, 2025 nor'easter was a fast-moving and quickly-developing nor'easter that brought accumulating snowfall to much of the Northeastern United States. The origins of the storm were complex, with an area of low pressure developing on the backside of a cold front that had swept through the region on January 19. The system quickly organized, with snowfall breaking out across the Mid-Atlantic by later that day as the storm began moving offshore. By early the next day on January 20, the event had ended for most in the Northeast as the nor'easter moved out to sea, rapidly strengthened and then moved through Atlantic Canada, peaking in intensity on January 22 over the Arctic Sea before dissipating. Within the U.S., snowfall accumulations of 8–12 inches (20–30 cm) were common across much of the interior Northeast and into portions of eastern Canada as well.

Several states within the Northeast declared a state of emergency, both in anticipation for the storm and the very cold temperatures that were expected to follow in the coming days after the storm passed . Many flights were delayed or cancelled as a result of the storm, and a long stretch of winter storm warnings and winter weather advisories were issued for millions of U.S. residents across the Northeast. Approximately 6,000 people were estimated to have lost power as a result of the nor'easter, mainly in New York and Pennsylvania and at least one injury was confirmed from a vehicle pileup due to the snow.