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Flash Flood in Carroll County, New Hampshire
Flash Flood June 11, 2026 · Carroll 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 a washout on Cleveland Hill Road in Tamworth.
The wider storm
On June 11, 2026, a severe flash flood event impacted Carroll County, New Hampshire, devastating numerous roads in the town of Madison and surrounding areas. The event was driven by a slow-moving warm front interacting with an unstable and moist airmass. This setup allowed a cluster of deep convection to train continuously over the region, producing extreme localized rainfall rates that peaked at an estimated 4 inches per hour. Total accumulations reached 5.47 inches near Albany and a public report of 4.45 inches in Madison, qualifying the deluge as a 100-year average recurrence interval (ARI) event. The extreme flooding was heavily exacerbated by saturated antecedent soil conditions left behind by a remarkably wet May, which had already seen double its typical rainfall.
Began near Tamworth (43.8600, -71.2800).
Source: NOAA Storm Events Database, event 1344691. Narratives are written by the National Weather Service forecast office that issued the report.
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