07/23/2010 06:36 pm ET Updated May 25, 2011

New York Tornado Warning Issued: All NYC Boroughs Included In Alert

New York City is under a tornado watch tonight, Friday, July 23, 2010, until 1 a.m., according to the National Weather Service.

UPDATE: The Weather Channel has upgraded the seriousness of the threat, declaring a tornado warning for New York City based on a "strong supercell" in New Jersey.

UPDATE (2): The tornado warning has expired in the NYC area.

The rare tornado watch was issued around 6 p.m. local time.

Per NBC New York, the alert includes the following areas:

Fairfield county in Connecticut, Bergen, Passaic, Essex, Hudson and Union counties in New Jersey, and Rockland, Westchester, Putnam, Orange, Nassau and Suffolk in New York as well as all five boroughs of New York City.

This is a developing story.