|Flooded LaGuardia Airport, November 25, 1950; Photo Queens Library via WeatherUnderground|
I'm not attempting to be alarmist -- I am attempting to get your attention. With the worst-case storm intensity and location, this type of flooding is certainly possible. You'll see surge forecasts for NYC at the end of this posting.
Here is an updated NOAA forecast, based on the newest (12Z Saturday) GFS model showing major flooding at Battery Park in Lower Manhattan. This forecast -- if exactly accurate -- jeopardizes the NYC subway system.