The NWS Forecaster Discussion for the NYC region...
forecast.weather.gov

... A potentially historic winter storm will impact the Tri-State area today into Monday. This is a dangerous situation with blizzard conditions expected to develop tonight.

All guidance has converged on the evolution, track, and intensity of the system. There are some subtle differences with the global models taking a 970 mb low close to the 40N/70W benchmark by Monday morning, while the hires models are slightly farther west. The latter could be the difference for even higher snowfall amounts than currently forecast.

Low pressure will quickly develop off along the North Carolina coast this morning and rapidly intensify this evening into Monday morning as it slowly lifts north-north east towards the 40N/70W benchmark. The 00Z ECMWF has come into better agreement as it has generally been on the eastern envelope of the operational guidance. This slight shift has resulted in the model QPF coming more into line with the current forecast. Forecast liquid equivalent amounts are mainly between 1.5 and 2 inches. Initially, snow ratios will start out 10:1 or even a bit lower today, then increasing to 12-14:1 by daybreak Monday as colder air wraps around the system. NBM snow ratios have been consistently too high through the event from start to finish.

While deep-layered lift in the snow growth region (-10 to -20C) favors dendritic growth and high ratios, high winds will likely result in fracturing of the crystals, lowering rates. Putting this all together, expect 1 to 2 ft across the tri-state. This is up a few inches from the last forecast.

On the higher end, the NBM (01Z) supports 23 to 30 inches across the area, due to a bit more QPF and the aforementioned higher ratios.

Its 90th percentile supports close to 3 ft across much of the area. The NAMNest is also on the higher end with 2 to 3 inches of liquid equivalent. This is likely due to its more westward track.

The 06Z HRRR which is similar in its track is very much in line with the current forecast. However, a reasonable worst case could put totals up to 3 ft. ...

US: Technical issues force NASA to postpone moon mission
www.dw.com

... The US space agency NASA on Saturday announced that an issue with the flow of helium to the upper stages of its SLS rocket has left engineers with no option but to again postpone the launch of the agency's first manned moon mission in 50 years.

NASA Administrator Jared Isaacman said that a bad filter, valve or connector plate could have stalled helium flow, explaining that the 322-foot-tall (98-meter) rocket would have to be rolled back into the Vehicle Assembly Building at Kennedy Space Center in Florida to allow specialists to track down the source of the problem.

"We will begin preparations for rollback, and this will take the March launch window out of consideration," Isaacman said via X. NASA's next opportunity will likely come in April. ...

Greenland Rejects Trump Hospital Ship, Criticizes US Health Care
www.newsweek.com

... Greenland's prime minister has publicly rejected U.S. President Donald Trump's suggestion to send a U.S. hospital ship to the island, saying the semi-autonomous Danish territory already provides free health care to its citizens and does not need outside medical assistance.

"It's going to be a no thank you from here," JensFrederik Nielsen wrote in a pointed statement on Facebook Sunday, saying Greenland's publicly funded health care system was a "deliberate choice" and contrasting it with the U.S. "where it costs money to go to the doctor. He added that Greenland remained open to cooperation, but wanted Washington to pursue dialogue rather than "random outbursts on social media." ...