Debris Flow in New Hampshire
Every debris flow event the National Weather Service has filed in New Hampshire, year by year, with the most significant episodes. A fast-moving slurry of mud, rock and debris, usually on a slope soaked by heavy rain or stripped by a fire.
The most significant on the map
The most significant debris flow episodes in New Hampshire.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The record
- Events
- 3
- Deaths
- 1
- Injuries
- 0
- Damage
- None recorded
Every year
The most significant
Ranked by deaths, injuries, damage and size together.
- Debris Flow and Flooding in New Hampshire, October 29 to 30, 2012On Monday, October 29th, Hurricane Sandy (and its remnants) tracked northwest from well off the North Carolina coast to southeastern Pennsylvania, making landfall near the southern tip of New Jersey.
- Debris Flow in New Hampshire, May 11, 1996Two mudslides, triggered by heavy rains, closed a section of Rt. 302 near Bath twice. The first mudslide occurred shortly before noon while the second mudslide occurred shortly after 7 pm.
- Debris Flow in New Hampshire, May 10, 2000Continued heavy rains caused a 60-yard-long section of hillside in Columbia just north of the Columbia Bridge to collapse. The soil flowed out to the centerline of Route 3.
More
Sources
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 2026-09-24.