Flash Flood — Allegany, New York

2025-07-16 · near Andover, Allegany, New York

Event narrative

Water flowing over the road on State Route 21 in Andover.

Wider weather episode

A shortwave trough and attendant surface cold front impinging on a weak shear, but very warm and moisture-laden atmosphere led to the development of showers and thunderstorms late in the day into the evening hours which produced isolated severe winds and flash flooding.

View location on OpenStreetMap → (42.1618, -77.7924)

Source: NOAA Storm Events Database, event_id 1286825. Narrative written by the NWS forecast office that issued the report.