New York City is currently experiencing a cold spell after a brief warm period. A polar air mass has descended upon the region, triggering extreme cold weather warnings. This follows a day where temperatures reached a high of 54°F (12°C) on Saturday, prompting an abrupt shift back to winter conditions that are expected to persist for several days before a warming trend begins.

The city's response to the cold has included the reactivation of the Blue Code, a measure aimed at protecting vulnerable populations from the risks associated with extremely low temperatures. This alert was put into effect on Sunday and remained in place until Monday morning, with Newark extending similar measures into Tuesday. The Blue Code serves as a signal for residents and services to provide additional support and resources to those in need.

Looking ahead, forecasts indicate that after the cold snap, temperatures will gradually rise, potentially accompanied by rainfall. This change in weather is likely to bring relief from the harsh conditions currently affecting New York and may mark a return to more typical winter variability in temperatures as the season progresses.