Aug 4, 2018
A developing area of low pressure along a surface trough helped produce heavy rainfall across parts of the Lower Hudson Valley on the morning of August 4th that resulted in flash flooding. Rainfall amounts ranged from 1-2.5 inches across Rockland County, with a CooCoRaHS observer in West Nyack reporting 2.47 inches of rain between the afternoon of August 3rd and the afternoon of August 4th.
Source: NOAA National Weather Service Storm Events Database (event 775744). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Bronx County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.