Flash Flood — Sullivan, New Hampshire

2023-08-04 · near Puckershire, Sullivan, New Hampshire

Event narrative

In Claremont, rapid run-off from a thunderstorms caused the Quabbinnight Brook to overflow that washed out a portion of Chestnut Street.

Wider weather episode

Localized flash flooding was observed after thunderstorms trained over portions of western New Hampshire on the afternoon of the 4th. The airmass was anomalously moist supporting rainfall rates over 2 inches per hour. The heavy rain fell over already saturated ground conditions which resulted in rapid runoff. The storms were fairly localized which limited their impact.

View location on OpenStreetMap → (43.3500, -72.3100)

Source: NOAA Storm Events Database, event_id 1131045. Narrative written by the NWS forecast office that issued the report.