Philadelphia

Extended Cold Weather Advisory in Delaware, Maryland, New Jersey, and Southeast Pennsylvania

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Published on January 27, 2026
Extended Cold Weather Advisory in Delaware, Maryland, New Jersey, and Southeast PennsylvaniaSource: Unsplash/ Patrice Bouchard

The National Weather Service in Mount Holly, NJ, has extended a cold weather advisory for multiple counties across Delaware, northeast Maryland, central and southern New Jersey, and southeast Pennsylvania. According to the latest update, this advisory is set to remain in effect until 10 AM EST tomorrow. With wind chills plunging as low as 10 degrees below zero, residents in these areas are urged to take practical precautions to avoid the risks of hypothermia.

The cold snap, marked by bitter wind chills, is notable for its intensity rather than its novelty. Philadelphia and surrounding counties are experiencing especially frigid conditions, with “very cold wind chills as low as 10 below,” as per the NWS. Philadelphia itself woke today to a cloudless 16-degree sky, little changed from the predawn hours when the National Weather Service last reported conditions.

This cold spell is more than an inconvenience; it is a health hazard. The National Weather Service advisory underscores the risk, warning that wind chills as low as 10 below zero could lead to hypothermia if proper precautions are not taken. As such, individuals venturing outdoors are advised to wear appropriate clothing, including a hat and gloves, to protect against the frigid conditions. Visibility remains clear, the agency notes, but it is the wind chill—drawing the air’s teeth to nip at exposed skin—that poses the real danger.

Looking ahead, the detailed forecast anticipates an increase in cloudiness with high temperatures struggling to reach the low 20s. Nights are set to be even colder with the upcoming Thursday night potentially dropping to around 1 degree. The prospect of snow looms on the horizon for the weekend, with the National Weather Service predicting a 40% chance of snow for Saturday night, and continuing through Sunday. Residents should stay informed on the latest weather developments and continue to take all necessary measures to stay warm and safe.