Flash Flood in Grafton County, New Hampshire

Flash Flood July 31, 2024 · Grafton County, New Hampshire

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

Heavy rainfall caused significant washouts on NH-25C in Warren.

The wider storm

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.

Began near Warren Morse Fld Arp (43.9600, -71.9600).

Source: NOAA Storm Events Database, event 1192523. Narratives are written by the National Weather Service forecast office that issued the report.

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