New York City is headed for a First Alert Weather Day on Friday due to extreme heat and humidity levels, plus the risk of strong to severe thunderstorms in the afternoon.

Record highs possible Friday

Highs will go from Thursday's low 90s to the mid and upper 90s on Friday. Along with those very hot temperatures will come very high humidity levels, which will contribute to heat indices reaching triple digits. Record highs are possible, as well.

In addition to dangerously hot temperatures, the threat of severe thunderstorms will also return by Friday afternoon and evening. Greatest hazards associated with these storms would be damaging winds and torrential downpours.

Heat alerts issued for parts of Tri-State Area on Friday

The National Weather Service already issued advisories and watches that go into effect Friday for parts of the Tri-State Area.

An extreme heat watch goes into effect at 10 a.m. Friday and lasts until 8 p.m. for Bergen, Passaic, Union, Essex, Hudson, Middlesex and Somerset counties.

A heat advisory goes into effect at 11 a.m. and lasts until 8 p.m. for most of the region, excluding Sullivan, Ulster and Dutchess counties.

Heat advisories kick in any time there's a heat index of 95-99 degrees for two consecutive days, or 100-104 degrees for any length of time. 

An excessive heat watch kicks in if there's a heat index of 105 degrees or more for two consecutive hours or greater.

Some areas -- especially parts of northeast New Jersey, New York City, western Long Island and the Lower Hudson Valley -- could flirt with heat warning criteria by Friday afternoon.   

Saturday looks hot and humid again but a bit less intense, depending on cloud cover. Another front may bring showers or storms from late Sunday into Monday.

Click here to check the latest watches, warnings and alerts.