Flash Flood — Westchester, New York

2024-08-06 · near Larchmont North, Westchester, New York

Event narrative

Route 1 in Mamaroneck closed due to flooding.

Wider weather episode

Several rounds of heavy thunderstorms developed over the area on the afternoon of August 6th. A slow moving frontal system stalled out over the area. PWATs of 2-2.2 inches and a sharp gradient of MUCAPE peaking out over the area near 2500 J/kg allowed for the development of strong thunderstorms producing torrential rainfall with rates upwards of 1.5-2.5 inches per hour. Total rainfall was 1-3 inches with localized amount up to 4-5 inches.

View location on OpenStreetMap → (40.9300, -73.7500)

Source: NOAA Storm Events Database, event_id 1212538. Narrative written by the NWS forecast office that issued the report.