A slow moving low pressure system tracked across the region between the 9th and the 10th. The region was vulnerable to flooding due to saturated ground conditions and elevated stream flows from days of on and off again rainfall.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS GYX wrote it up.
A slow moving low pressure system tracked across the region between the 9th and the 10th. The region was vulnerable to flooding due to saturated ground conditions and elevated stream flows from days of on and off again rainfall. The event was drawn out with a fairly steady rain with rates <0.5/hr. There was a period of heavier rainfall as the system received jet enhancement as it lifted to the northeast. Rainfall amounts were measured between 2 and 3 inches, primarily across Hillsborough County New Hampshire. Some small streams came out of banks causing flooding around Milford, Amherst, and Lyndeborough.
The national radar mosaic for the moment the first event began.
3 flood. Local standard time, as filed.
Heavy rain with up to three inches in the local area caused overland flooding with standing water up to a foot deep reaches up to homes on Lake Outlet Rd. in Amherst.
Heavy rainfall of 3 inches in the local area caused flooding of Boston Post Road between Ferry Road and Simeon Wilson Road in Amherst due to the Souhegan River over flowing its bands.
Heavy rainfall with locally up to three inches on saturated soils caused Cold Brook to flood 2nd NH Turnpike in New Boston.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New Hampshire in 2025Every state in 2025This day in weather historyWarnings in New Hampshire, May 2025
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 1267989, 1267993, 1267994.