FloodZoneMap.org

New Hampshire Flood Stories

576 first-hand accounts of flood events in New Hampshire, ranked by impact. Each is a NOAA-written narrative of the moment.

Flash Flood$100K damage

Belknap, NH · Jun 14, 1998

Three to eight inches of rain caused small rivers and streams to rise. Many roads were flooded and/or washed out. Campgrounds and some lakeside homes had to be evacuated.

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Flash Flood$100K damage

Merrimack, NH · Jun 14, 1998

Three to eight inches of rain caused small rivers and streams to rise. Many roads were flooded and/or washed out. Campgrounds and some lakeside homes had to be evacuated.

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Flash Flood$100K damage

Rockingham, NH · Jun 13, 1998

Three to eight inches of rain caused small rivers and streams to rise. Many roads were flooded and/or washed out. Campgrounds and some lakeside homes had to be evacuated.

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Coastal Flood

Coastal Rockingham, NH · Nov 24, 2011

Low pressure deepened to 997 mb as it moved northeast near Cape Cod on November 23rd, during a period of high astronomical tides. This system produced a prolonged period of northeast winds on the 23rd followed by a northerly flow on the 24th producing a moderate swell.

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Flood

Merrimack, NH · Mar 7, 2011

A combination of warm weather and heavy rain resulted in rapid snowmelt and 1 to 3 inches of rain, causing area rivers to rise. The rise in rivers caused ice jams to occur resulting in flooding.

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Flash Flood$10K damage

Coos, NH · Aug 28, 2011

Tropical Storm Irene moved north through central and western New England bringing wind and very heavy rain to New Hampshire. This resulted in flash flooding on small rivers and streams in the mountains and flooding of small rivers and streams as well as main stem rivers farther…

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Flood$15K damage

Cheshire, NH · Feb 13, 2008

A low pressure system developed off the Mid-Atlantic coast and moved up the east coast southeast of Nantucket producing snow, rain, and ice across Southern New England.

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Flood$25K damage

Southern Carroll, NH · Oct 15, 2005

Heavy rain fell over New Hampshire due to the rapid development of surface low pressure well to the southeast of New England. Rainfall amounts ranged from around 3 inches in southern New Hampshire up to 9.26 inches at Pinkham Notch.

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Flood$25K damage

Southern Coos, NH · Oct 15, 2005

Heavy rain fell over New Hampshire due to the rapid development of surface low pressure well to the southeast of New England. Rainfall amounts ranged from around 3 inches in southern New Hampshire up to 9.26 inches at Pinkham Notch.

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Flood$25K damage

Northern Carroll, NH · Oct 15, 2005

Heavy rain fell over New Hampshire due to the rapid development of surface low pressure well to the southeast of New England. Rainfall amounts ranged from around 3 inches in southern New Hampshire up to 9.26 inches at Pinkham Notch.

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Flood$25K damage

Northern Coos, NH · Oct 15, 2005

Heavy rain fell over New Hampshire due to the rapid development of surface low pressure well to the southeast of New England. Rainfall amounts ranged from around 3 inches in southern New Hampshire up to 9.26 inches at Pinkham Notch.

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Flash Flood

Sullivan, NH · Aug 4, 2023

Localized flash flooding was observed after thunderstorms trained over portions of western New Hampshire on the afternoon of the 4th. The airmass was anomalously moist supporting rainfall rates over 2 inches per hour.

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Flash Flood

Sullivan, NH · Aug 4, 2023

Localized flash flooding was observed after thunderstorms trained over portions of western New Hampshire on the afternoon of the 4th. The airmass was anomalously moist supporting rainfall rates over 2 inches per hour.

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Flood$10K damage

Hillsborough, NH · Feb 13, 2008

A low pressure system developed off the Mid-Atlantic coast and moved up the east coast southeast of Nantucket producing snow, rain, and ice across Southern New England.

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Tropical Storm

Coastal Rockingham, NH · Aug 4, 2020

Tropical Storm Isaias was the first tropical storm to impact New Hampshire since 2011. The center of the storm tracked west of the state, keeping the flooding rain associated with the storm across New York.

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Tropical Storm

Belknap, NH · Aug 4, 2020

Tropical Storm Isaias was the first tropical storm to impact New Hampshire since 2011. The center of the storm tracked west of the state, keeping the flooding rain associated with the storm across New York.

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Tropical Storm

Cheshire, NH · Aug 4, 2020

Tropical Storm Isaias was the first tropical storm to impact New Hampshire since 2011. The center of the storm tracked west of the state, keeping the flooding rain associated with the storm across New York.

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Tropical Storm

Eastern Hillsborough, NH · Aug 4, 2020

Tropical Storm Isaias was the first tropical storm to impact New Hampshire since 2011. The center of the storm tracked west of the state, keeping the flooding rain associated with the storm across New York.

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Tropical Storm

Interior Rockingham, NH · Aug 4, 2020

Tropical Storm Isaias was the first tropical storm to impact New Hampshire since 2011. The center of the storm tracked west of the state, keeping the flooding rain associated with the storm across New York.

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Tropical Storm

Western And Central Hillsborough, NH · Aug 4, 2020

Tropical Storm Isaias was the first tropical storm to impact New Hampshire since 2011. The center of the storm tracked west of the state, keeping the flooding rain associated with the storm across New York.

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Tropical Storm

Southern Carroll, NH · Aug 4, 2020

Tropical Storm Isaias was the first tropical storm to impact New Hampshire since 2011. The center of the storm tracked west of the state, keeping the flooding rain associated with the storm across New York.

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Tropical Storm

Northern Coos, NH · Aug 4, 2020

Tropical Storm Isaias was the first tropical storm to impact New Hampshire since 2011. The center of the storm tracked west of the state, keeping the flooding rain associated with the storm across New York.

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Tropical Storm

Southern Coos, NH · Aug 4, 2020

Tropical Storm Isaias was the first tropical storm to impact New Hampshire since 2011. The center of the storm tracked west of the state, keeping the flooding rain associated with the storm across New York.

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Tropical Storm

Northern Grafton, NH · Aug 4, 2020

Tropical Storm Isaias was the first tropical storm to impact New Hampshire since 2011. The center of the storm tracked west of the state, keeping the flooding rain associated with the storm across New York.

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