NYC Weather Forecast: 'Heat Alert' Extended; Hour-By-Hour Forecast For Friday

NEW YORK, NY — New York City's hot, muggy nightmare will continue on Friday, forecasters say. The National Weather Service's "heat alert" has been extended through Friday evening, and temperatures could reach 95, with humidity making it feel even worse.

It's the third straight day of temperatures in the mid-90s, making this the hottest stretch of what has so far been a fairly mild summer. Saturday is expected to be another hot one before some rain and possible thunderstorms bring some relief that night and into Sunday.

The city will have cooling centers open during the day, which are located in places such as libraries, NYCHA facilities and senior centers. Click here to find one near you. (And for more weather updates and other news about your NYC neighborhood, subscribe to Patch to receive daily newsletters and breaking news alerts.)

See an hour-by-hour forecast for Friday, and a look at the rest of the weekend, below.

"The heat and humidity may cause heat stress during outdoor exertion or extended exposure," the National Weather Service says. "Extreme heat can cause illness and death among the at-risk population who can not
stay cool."

The heat advisory lasts until 6 p.m. Friday night.

"Seniors and those with chronic health problems or mental health conditions are at increased risk. Homes without air conditioning can be much hotter than outdoors," the service said.

"Use air conditioning to stay cool at home, or go to a place that has air conditioning. Check on vulnerable friends, family members and neighbors.

"To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! In cases of heat stroke call 9 1 1."

Here's an hour-by-hour forecast for Friday, courtesy of darksky.net, so you know when to stay indoors and when it's safe to make a break for the subway. And below that, the National Weather Service's forecast for the weekend.

July 21 Hourly Forecast for New York City

Drizzle this evening.

7am - Partly Cloudy, 76°

Chance of precipitation: 0%. Wind 4 mph from the WNW.

8am - Partly Cloudy, 77°

Chance of precipitation: 0%. Wind 5 mph from the WNW.

9am - Clear, 79°

Chance of precipitation: 0%. Wind 5 mph from the W.

10am - Clear, 82°

Chance of precipitation: 0%. Wind 6 mph from the NNW.

11am - Partly Cloudy, 84°

Chance of precipitation: 0%. Wind 7 mph from the NW.

12pm - Partly Cloudy, 87°

Chance of precipitation: 0%. Wind 7 mph from the WNW.

1pm - Partly Cloudy, 89°

Chance of precipitation: 0%. Wind 7 mph from the WNW.

2pm - Partly Cloudy, 91°

Chance of precipitation: 0%. Wind 7 mph from the WNW.

3pm - Partly Cloudy, 92°

Chance of precipitation: 0%. Wind 8 mph from the WNW.

4pm - Partly Cloudy, 92°

Chance of precipitation: 0%. Wind 8 mph from the W.

5pm - Partly Cloudy, 93°

Chance of precipitation: 0%. Wind 8 mph from the W.

6pm - Mostly Cloudy, 93°

Chance of precipitation: 0%. Wind 8 mph from the WNW.

7pm - Drizzle, 92°

Chance of rain: 2%. Wind 7 mph from the W.

8pm - Drizzle, 90°

Chance of rain: 3%. Wind 6 mph from the W.

9pm - Drizzle, 88°

Chance of rain: 2%. Wind 6 mph from the W.

10pm - Partly Cloudy, 86°

Chance of precipitation: 0%. Wind 6 mph from the NW.

11pm - Partly Cloudy, 84°

Chance of precipitation: 0%. Wind 6 mph from the WNW.

12am - Partly Cloudy, 83°

Chance of precipitation: 0%. Wind 5 mph from the WNW.

Today

Sunny, with a high near 94. West wind 6 to 13 mph.

Tonight

Partly cloudy, with a low around 78. West wind around 8 mph.

Saturday

Mostly sunny, with a high near 93. Light and variable wind becoming south 5 to 10 mph in the afternoon.

Saturday Night

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8pm. Some of the storms could produce gusty winds and heavy rain. Mostly cloudy, with a low around 75. South wind 7 to 9 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday

Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rain. Mostly cloudy, with a high near 85. West wind around 6 mph becoming southeast in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Sunday Night

A 50 percent chance of showers. Mostly cloudy, with a low around 74.

Photo: We are all this guy. By Kevin Hagen/Getty Images