The whirlwind blizzard that slammed the tristate area dumped nearly 30 inches of snow in one Big Apple neighborhood --- making for one of the city's top 10 biggest snowstorms on record.

Grasmere, a neighborhood on Staten Island's north shore, was buried in a staggering 29 inches of snow as of 3 p.m., according to the latest totals collected by the National Weather Service.

The other four boroughs recorded anywhere from 14 to 24 inches throughout Monday afternoon, though updated counts are still rolling in, according to the forecaster.

Central Park, commonly used as the baseline for a snowstorm's average New York City deposit, hasn't had an updated total snowfall count since 1 p.m., according to the NWS.

At the time, the iconic Manhattan green space had 19.7 inches of snow blanketing it — which pushed Winter Storm Hernando over the edge to beat out January 2011's blizzard as the No. 9 "biggest" Big Apple snowstorm on record.

However, Washington Heights took the cake for the most snow in Manhattan, with 22.8 inches recorded just after 5 p.m.

Up in the Bronx, Mott Haven got hit the hardest with 23.4 inches, while Sheepshead Bay topped Brooklyn nabes with 22.5 inches and Whitestone was the king of Queens snowfall with 23 inches, according to the latest tallies, recorded throughout the afternoon.

Long Island was equally -- if not more -- brutalized by the storm. Central Islip received a whopping 31 inches of snow — and that was only as of 1:40 p.m., according to the NWS report.

The Long Island Rail Road and Metro-North Railroad will partially restore service for customers Tuesday morning after a historic blizzard walloped the region, according to the MTA. 

The LIRR will operate limited service beginning at 4 a.m. Tuesday on its Ronkonkoma, Huntington, Babylon, Oyster Bay, Montauk, and Port Washington branches, the transit authority announced late Monday.

Montauk service will be limited to trains between Speonk and points west, and Oyster Bay service will operate westbound in the morning and add eastbound only after the morning rush. 

Crews are currently de-icing trains and clearing fallen trees that crashed onto tracks during heavy winds overnight Sunday. 

Metro-North will operate on an enhanced Saturday schedule for the Hudson, Harlem, and New Haven lines, the MTA said. 

Some New York City subway express trains will run on local tracks during the morning rush hour, with modified service in the Rockaways and shuttle trains running between Euclid Avenue and the Rockaways, officials said. 

Buses in the Big Apple will continue running on a winter weather schedule with detours and curtailments possible along certain routes due to hazardous road conditions. 

Long accordion-style buses have also been replaced with 40-foot standard buses equipped with chained wheels.

Straphangers and railroad customers are encouraged to check MTA.info, the MTA app, or the TrainTime app before embarking on their Tuesday commutes.

A child and nun were nearly crushed by a tree that suddenly toppled in the snow in Hells Kitchen on Monday afternoon.

The scary scene unfolded as the pair was walking along a sidewalk near the Sisters of Life and Sacred Heart Convent between Ninth and Tenth Avenues on Monday as Winter Storm Hernando was winding down, W42ST reported.

Multiple branches came crashing down, followed by the trunk that splintered under the snow's mounting weight, according to harrowing video footage.

The heroic nun curled over the child, shielding him with her body while the branches scattered in the street and on a nearby stoop.

She hoisted the boy up into her arms and calmly shuffled away.

The Post reached out to the FDNY, who reportedly responded to the scene.

A huge mob of rowdy winter warriors descended on a Manhattan park on Monday afternoon — throwing snowballs in a chaotic scene and tormenting cops, according to authorities and witnesses.

Around 4:13 p.m., police responded to a 911 call about a disorderly group of people inside Washington Square Park, according to the NYPD. 

Arriving officers found a large group of revelers throwing snowballs and observed pure pandemonium as hundreds of people launched frozen projectiles at each other and oncoming traffic, according to police and witnessed by The Post.

“The New York City blizzard snowball fight has happened. It was complete pandemonium,” said a man who showed up for the fight.

“This s--t ain’t safe. I got hit in the ear, and it’s been ringing for 20 minutes,” he said.

At one point, people in the large group were seen tossing snowballs at an NYPD vehicle as officers got inside and drove off on a street beside the Greenwich Village park. 

Members of the crew were also spotted lobbing the occasional snowball at officers — with at least one cop holding up a can of pepper spray and warning the crowd to back up. 

Cops were heard over a megaphone telling revelers to “enjoy themselves,” but not hurl any snowballs at cars.

No injuries were reported during the blizzard mayhem, cops said.

The New York City eighth-grader who appeared in the mayor’s cutesy snow-day announcement on social media Sunday hopes she’ll get another call soon from Hizzoner -- saying he's reversing course on ordering kids back to class Tuesday.

Victoria Mompoint, who appeared in the recording of the Zoom call with Mayor Zohran Mamdani for his public snow-day proclamation, is now urging the mayor rethink his edict reopening schools -- calling conditions “unsafe” after the city was walloped with up to two feet of snow, according to Gothamist.

“A lot of people are telling me, texting me on Instagram, ‘Like, can you call the mayor back?” the 14-year-old told the outlet.

 ”The conditions are unsafe, she said. “It's not even like kids don't want to go to school — kids don't want to wait for a bus that’s going to take probably 30 minutes plus and climb over mountains of snow, and it's probably not possible that all the snow is going to be cleaned off by the time that kids have to go to school tomorrow morning.”

Victoria, a student at Meyer Levin Junior High School in Brooklyn, said she doesn’t think many of her peers will be able to make it to school, anyways. She said not everyone has the right snow gear.

“ I personally, I don't have snow shoes. I have a lot of Jordans, but I don't wanna mess with my Jordans,” she said.

A Change.org petition demanding a second snow day has amassed over 88,000 signatures to date.

Part of Long Island saw its largest snowfall in recorded history Monday.

The National Weather Service recorded 29.1  inches of snow at the Islip Airport in Suffolk County as of 1 p.m. — preliminarily beating the town’s previous record of around 27 inches from 2013.

Monday’s high was the most snow to fall in the town since records were first kept in 1963.

Most of Long Island is now buried under  20 to 30 inches -- with some other municipalities poised to potentially break records, too.

Winds hit 80 mph and snow erased streets, turned blocks into waist-deep trenches, swallowed cars and transformed once-busy roads into silent, snow-packed corridors.

The National Weather Service is expected to release updates throughout the day as they measure the impact throughout the island.

There's snow-way.

Tens of thousands of people signed a petition within minutes Monday to plead with New York City  Mayor Zohran Mamdani to at least opt for  remote school instruction Tuesday.

The mayor announced at an earlier press conference Monday that the city’s 1.1 million public-school students would have to return to school for in-person learning Tuesday -- after giving them a real snow day Monday and not requiring them to log on at all.

“These conditions create serious safety concerns for students, school staff, and families navigating hazardous roads and limited transit options,” reads the opposing Change.org petition, which had already garnered more than 69,100 backers by Monday afternoon.

A remote day would “proactively protect our children and educators while easing the significant strain placed on our transportation infrastructure during severe winter weather,” it added.

A Queens mom named Stefanie wrote on the site, “Snow is still coming down, streets haven’t been plowed how am I expected to get my toddlers in this mess to school and daycare safely?”

 Another signer named JJ added, “The conditions are extremely dangerous.

“By forcing kids to go to school we’re creating an association between learning and caution/danger which is negative for obvious reasons.’’

While many Big Apple residents stayed indoors during Monday’s blizzard, scores of New York locals braved freezing temperatures and fierce wind gusts for some classic snow day fun.

At a picturesque winter wonderland scene at Central Park – where snowfall totals are already measuring at 19.7 inches – dozens of families were skiing, snowboarding and sledding on a hill near 81st Street Monday afternoon.

Among the crowd were Upper East Side residents Sam and Georgia Bristol, who brought their daughters sledding on their day off from school.

“This is a great hill: you can’t beat this,” said dad Sam, a consultant who blocked out time in his calendar to enjoy the snow with his daughters in between meetings.

“It hasn't been so good [for sledding] the last couple of years, but this is awesome,” he added. “This is warm and wetter – it’s a little bit easier for the girls until they get all wet and start crying – but it’s awesome.”

Elsewhere, 43-year-old Billy of uptown Manhattan tried his luck snowboarding on Gotham’s makeshift slope.

“It’s a lot of fun, a hell of a lot of fun,” the uptown Manhattan resident, who goes by the moniker Boxframe Billy for his recycled eyewear business, told The Post. 

“It's good energy. It's good vibes: Everyone's out instead of being stuck inside pouting — and the hot cocoa will taste good after.”

“It’s amazing!” exclaimed 11-year-old Upper East Side resident Hudson, who was sledding with his mom at the same Central Park hill Monday.

“Since he's been born, we've had about three solid sled days, so we are well versed on how to prep for them,” said Hudson’s mom Serena, who works for the New York Public Library.

“One year, last year, he stayed out until the sun went down,” she recalled. “He was the last man on the hill, he was in full gear.

“We’ll try and ride it until we’re the last people standing again,” she added. “Why not?”

The New York City Council Republican contingent is sounding the alarm over rushing back to school in wake of a historic blizzard — saying the snowy streets will lead to "mass absenteeism."

“The decision to open schools for in-person learning tomorrow is hasty and misguided," the minority conference said in a statement.

"Many outerborough neighborhoods have been disparately impacted by this storm and given the sheer volume of snow, need much more time and resources to make roads safe and passable. It is going to be impossible for many students to reach school and for parents to get to work by tomorrow morning, and as a result, there will be mass absenteeism.

"DOE must either keep schools closed or offer a remote option to the tens of thousands of students who will not be able to attend.”

A New York City Parks Department snow plow fell into a massive sinkhole outside of City Hall Park on Monday.

Parks officials reported no injuries and said that by late afternoon, staff was able to lift the truck and remove it from the site.

The cold never bothered them anyway!

New Yorkers headed outside for some fun in the snow.

Big Apple travelers were scrambling for flights out of New York on Monday after hundreds of scheduled take-offs in the tri-state area were cancelled.

At LaGuardia Airport in Queens, teacher Deidra Jennings and her 8-year-old daughter Rashae of Freeport, Grand Bahama, were patiently waiting for a connecting flight to Miami after their initial departure was canceled Saturday.

“I thought they’d maybe have a few flights leaving today,” Jennings told The Post on Monday afternoon. “I was hoping I’d get on the last flight … but that was canceled. I’m a teacher. I need to get home. She needs to get home.

“The lady at the counter told me she could get me on a flight tomorrow, but I have to stay here tonight,” she said.

Jennings fumed that the only concession stand open in the airport appeared to be a Starbucks at Terminal B.

“How am I going to feed her? How’s she going to get comfortable to sleep?'' she said of her young daughter. "It’s a lot. A hotel is extra money. …  I already had my shedding of tears, because this is a lot.” 

Nicole Smith and her two young sons from Atlanta, Ga., were also waiting for a flight back home Monday afternoon – after two of their flights were cancelled.

“I have another one rebooked for tomorrow,” Smith, 36, said. “We’re pretty much just sitting here and waiting. I was going to start looking for food, but the only thing I saw was a Starbucks.” 

Smith lamented she’s starting to run out of ways to entertain her boys, ages 8 and 12, during the days-long wait: 

“It’s very frustrating – frustrating and boring. Kids lose patience,” she said. “We have to be here [for] almost two days.”