Flash Flood — Grafton, New Hampshire

2024-07-31 · near East Haverhill, Grafton, New Hampshire

Event narrative

Oliverian Brook rose rapidly on the evening of the 31st following heavy rainfall. Floodwaters surrounded a home on Gheradi Road near Mt. Moosilauke Highway in Haverhill, requiring at least one swift water rescue.

Wider weather episode

An area of low pressure supported widespread showers and thunderstorms on July 30th and 31st. Slow storm motions allowed heavy rain to fall over the same area, with high rainfall rates over 2 inches per hour. The most significant flooding occurred over Grafton County where saturated ground conditions and steep terrain supported flash flooding in Piermont.

View location on OpenStreetMap → (44.0200, -71.9600)

Source: NOAA Storm Events Database, event_id 1192527. Narrative written by the NWS forecast office that issued the report.