Flood — Bronx, New York

2021-08-22 to 2021-08-23 · near Fordham, Bronx, New York

Event narrative

The Bronx River at the Bronx Botanical Gardens rose above minor flood stage (3.0 feet) at 6:45pm EST on August 22. It then continued to rise, exceeding moderate flood stage (3.5 feet) at 8:45pm EST before cresting at a height of 3.83 feet at 11:30pm EST. The river fell below moderate flood stage at 3:45am EST on August 23, then below minor flood stage at 6:15am EST.

Wider weather episode

Rainfall from Tropical Storm Henri resulted in widespread flash flooding across southeastern New York, particularly portions of the Lower Hudson Valley. With a tropical airmass in place (precipitable water values greater than 2 inches), rainfall totals generally ranged from 2-5 inches, with this rain coming in addition to the 2-5 inches that fell during the predecessor rainfall event the night before. This resulted in widespread rainfall amounts of 3-6 inches in many locations over a 24-36 hour period. The ASOS in Central Park recorded an additional 3.39 inches of rain, for a total of 7.84 inches across the two days.

View location on OpenStreetMap → (40.8642, -73.8765)

Source: NOAA Storm Events Database, event_id 982575. Narrative written by the NWS forecast office that issued the report.