NEW YORK (CBSNewYork) -- Wednesday's snow may have played a role in a 19-car crash on the Henry Hudson Parkway.
It happened around 6 p.m. near 181st Street.
Police say at least nine cars had to be towed from the accident.
At least six people were taken to local hospitals. Four people suffered serious injuries, but they are non-life-threatening. Two people suffered minor injuries.
An NYPD deputy sent out a message from the scene: "If you don't need to be out, stay home."
CBS2's Ali Bauman was out in Mobile 2 and saw a major back-up going north on the parkway after the crash.
Road conditions were poor Wednesday night as snow continued to fall across the Tri-State Area.
Bauman reports seeing cars stuck and with spinning wheels on the parkway.
The sanitation commissioner is urging New Yorkers to be patient, saying plow truck drivers are being methodical and taking their time due to low visibility.
Earlier Wednesday evening, Mayor Bill de Blasio visited the drivers.
"Every New Yorkers who wants tomorrow to go smoothly, stay off the roads tonight, stay off the roads in the morning, let these guts do their job and help them be safe," he said.
Alternate side parking is suspended in New York City on Thursday.
Anyone who is able to stay off the roads is advised to do so.
MORE STORM INFORMATION FROM NYC:
- Guidance on restaurant preparations
- Severe weather guidance
- Department of Sanitation snow operations
- Track NYC snow plows
On the local streets of Manhattan, pedestrians were also trying to navigate the slippery streets and sidewalks.
Roadway dining has been suspended since 2 p.m. due to the weather, but sidewalk dining is still allowed.
Plenty of people were out enjoying some hot food and drinks at Fanelli Cafe in SoHo.
"Usually it's really fun to go out to a neighborhood bar when it's snowing out," bar owner Sasha Noe said.
"Supporting the staff and having a good time doing it," Dave Lee Morey, of the Upper East Side, said.
The snow was not as fun for the manager of Blind Tiger in the West Village. He spent the night clearing off the top of the restaurant's outdoor dining tent.
"I'm coming out every 30 minutes or so with a broom, getting as much snow off as possible instead of trying to take the whole thing apart just for a day or two," restaurant manager Lucas Nowakowski said.
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