Extreme rainfall amounts have resulted in enormous totals:
According to National Weather Service data, a month's worth of rain, up to 4.5 inches, fell in just 3 hours in Brooklyn on Friday morning.
According to NOAA projections, Brooklyn could expect this amount of rainfall over three hours just approximately once per 100 years.
In Manhattan, Central Park experienced the second-wettest hour there in 80 years with nearly two inches of rain falling in only one hour.
There has already received more than 5 inches of rain.
At John F. Kennedy International Airport in Queens, it has been the wettest day on record, according to preliminary National Weather Service data.
There has been at least 7.88 inches of rain since midnight.