Sep 1, 2021
Extremely heavy rainfall associated with the remnants of Hurricane Ida overspread southeast New York during the evening of September 1 and continued through the early morning hours of September 2. Rainfall totals ranged from 5-8 inches across much of the region, with much of that rain falling in just a few hours. The ASOS at Central Park recorded 7.19 inches of rain, including 3.15 inches in a single hour between approximately 9:00-10:00pm. This resulted in widespread catastrophic flash flooding
Source: NOAA National Weather Service Storm Events Database (event 995042). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Rockland County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.