Flash Flood — Essex, New York

2025-07-13 · near Sanford Mines, Essex, New York

Event narrative

A large landslide/debris flow occurred in the Avalanche Pass/Avalanche Lake area, blocking a popular hiking trail and clogging the upper portions of Avalanche Lake with heavy debris and timber.

Wider weather episode

A weak cold front slowly moved across northern NY during the afternoon and evening hours of July 13th. Several rounds of tropical showers and thunderstorms traversed the area with a few storms pulsing to severe limits. In addition, localized heavy rainfall caused flash flooding in the form of a landslide.

View location on OpenStreetMap → (44.1333, -73.9940)

Source: NOAA Storm Events Database, event_id 1265433. Narrative written by the NWS forecast office that issued the report.