New Yorkers can expect dangerously frigid temperatures heading into the weekend with leftover blowing snow from Thursday's blizzard.

The fast moving nor'easter left behind nearly a foot of snow behind in some parts of the city.

Central Park saw just over 8.5 inches of snow.

One of the heaviest amounts - 13/2 inches - was recorded in the Howard Beach section of Queens.

Friday's high will top out in the teens with subzero wind chills under mostly sunny skies.

Temperatures Friday night will fall into the single digits with wind chill values ranging from -10 to -15 degrees.

A wind chill advisory is in effect until 10 a.m. Saturday.

The city's public schools are open again Friday.

• These are the factors the Mayor considers when deciding whether to close schools for snow

Mayor Bill de Blasio says past experience with snow days helped guide his decision on whether to close them.

"No one can make these decisions with perfect information. You have to do your best to take the history and take the best information we have from the National Weather Service and then be decisive about what will be the best action in terms of protecting our kids and all the people who work in our schools and obviously take in the needs of parents into mind as well," De Blasio said.

Not everyone is on board with the mayor's decision.

A change.org petition was started yesterday to try to get him to change his mind and close school Friday.

More than 140,000 people have signed it so far.

The MTA says the city's transit system is up and running on a normal weekday schedule but riders may experience some delays, especially along bus routes.

The L train, however, was experiencing serious delays Friday morning because of frozen switches in Canarsie.

Weather-related service changes and delays are being reported on some Metro-North and Long Island Rail Road lines.

For the latest updates, visit mta.info. 

MTA officials say 1,200 workers have been working to clear snow from nearly 500 subway stations.

City airports are getting back to normal after canceling thousands of flights Thursday. 

LaGuardia Airport was up and running by around 7 p.m. Thursday after being shut down for several hours during the storm.

Flights were also suspended at Kennedy Airport.

They're scheduled to resume by 7 a.m. Friday.

Travelers should check with individual airlines to confirm their flight status. 

The flight tracking site Flight Aware says nearly 5,000 flights were cancelled across the U.S. Thursday.

That number includes more than two-thirds of flights in and out of New York and Boston.

A reminder that alternate side parking rules are suspened through Saturday.

Meters are still in effect.

Garbage and recycling pickups remain suspended.

The city Sanitation Department is reminding residents to not shovel snow back into the streets when clearing out their cars.

Businesses and homeowners are also reminded to shovel their sidewalks.

Starting Friday, anyone who is interested can register to work as an emergency snow laborer at their local Sanitation Department garage.

Workers will be tasked with shoveling snow and clearing ice from bus stops and crosswalks.

The pay is $15 an hour and $22.50 an hour after 40 hours are worked in a week.

You must be at least 18 years old to sign up.