Flash Flood — Grafton, New Hampshire

2024-07-10 · near Monroe, Grafton, New Hampshire

Event narrative

Washout on Route 135 at Grange Hall Road in Lisbon from unnamed tributary.

Wider weather episode

On July 10th the remnants of Tropical Storm Beryl phased with a low pressure system out of the Great Lakes to bring multiple rounds of heavy rainfall to northern New England, including Maine and New Hampshire. The previous 3 days had brought a swath of heavy rain just north of the White Mountains, saturating the ground and making it ideal for runoff. During the roughly 36 hour period, 3 to as much as 5 inches of rain fell across northern New Hampshire and Western Maine Mountains. This led to significant flash flooding around Littleton New Hampshire, and sporadic flash flooding eastward into Maine. A few trees were also downed to severe wind gusts.

View location on OpenStreetMap → (44.2841, -72.0359)

Source: NOAA Storm Events Database, event_id 1192556. Narrative written by the NWS forecast office that issued the report.