576 first-hand accounts of flood events in New Hampshire, ranked by impact. Each is a NOAA-written narrative of the moment.
A very moist air mass was in place across the region on the afternoon of July 19th as a cold front approached from the west. Precipitable water values, which approached 2 inches, were 2 to 3 standard deviations above normal.
Read the full account →Low pressure developed south of New England and remained nearly stationary from the 12th to the 15th resulting in over 12 inches of rain in some locations in a 72 hour period. Homes and businesses were damaged extensively. Many roads were washed out and impassable.
Read the full account →A southeast flow of tropical moisture developed over New Hampshire late Wednesday, September 15 as Hurricane Floyd moved slowly northeastward along the East Coast of the United States.
Read the full account →A surface front stalled just north of Southern New England resulted in a warm, unstable, moist airmass across southern New Hampshire. Plenty of instability and a 30-40 knot low level jet resulted in showers and thunderstorms while preciptable water values above 2 inches…
Read the full account →A southeast flow of tropical moisture developed over New Hampshire late Wednesday, September 15 as Hurricane Floyd moved slowly northeastward along the East Coast of the United States.
Read the full account →Low pressure developed south of New England and remained nearly stationary from the 12th to the 15th resulting in over 12 inches of rain in some locations in a 72 hour period. Homes and businesses were damaged extensively. Many roads were washed out and impassable.
Read the full account →A stationary front located through northern New Hampshire provided a focus for showers and thunderstorms to develop. Due to the slow movement of the storms rainfall rates were high resulting in flash flooding.
Read the full account →Strong coastal low pressure produced rainfall of 5 to 8 inches resulting in county wide flooding of small rivers and streams across numerous counties in New Hampshire. Road washouts were widespread with major damage occurring to roadways. Homes and businesses were also flooded.
Read the full account →A pre-frontal surface trough developed over southern New England, providing a focus for low level convection. Plenty of instability, as well as a strong upper jet aloft, allowed several of these storms to become severe, producing damaging winds.
Read the full account →A tropical airmass moving north ahead of an approaching cold front produced very heavy rainfall in just a two hour period across southern New Hampshire. Three to five inches of rain resulted in flash flooding in major urban centers including Manchester and Nashua.
Read the full account →A tropical airmass moving north ahead of an approaching cold front produced very heavy rainfall in just a two hour period across southern New Hampshire. Three to five inches of rain resulted in flash flooding in major urban centers including Manchester and Nashua.
Read the full account →A tropical airmass moving north ahead of an approaching cold front produced very heavy rainfall in just a two hour period across southern New Hampshire. Three to five inches of rain resulted in flash flooding in major urban centers including Manchester and Nashua.
Read the full account →A warm and very humid airmass was in place across the region on the afternoon of August 28th. There was little in the way of shear and upper dynamics so storms which formed were very slow moving and produced very heavy rain in a short period of time.
Read the full account →A weak area of low pressure slowly intensified as it moved over coastal Maine on November 16th. Ahead of the system a northerly wind of 20 to 25 knots developed over the coastal waters, before becoming light from the south near the time of high tide.
Read the full account →A low pressure system moving slowly northeast from through the Mid-Atlantic States spread rain into New Hampshire during the afternoon of April 2. Heavy rain continued through the 3rd as the storm continued to move slowly northeast.
Read the full account →A broad area of low pressure approached New England from the west on the 28th and stalled over the region on the 29th. A second area of low pressure developed off the mid Atlantic coast on the 29th and intensified as it moved north on the 30th.
Read the full account →An area of slow moving showers and thunderstorms produced up to 6 inches of rain in 3 hours resulting in flash flooding in several towns in southeast New Hampshire. Numerous roads were inundated by small streams and many were washed out.
Read the full account →Low pressure intensified as it moved up the east coast to near Cape Cod, Massachusetts on November 27th. This allowed for gale force northeasterly winds to generate nearshore waves of 10 to 15 feet and increased storm surge values.
Read the full account →Low pressure rapidly intensified on the 20th of April over the Great Lakes as a secondary area of low pressure developed along the New England coastline. Gale force easterly winds over the coastal waters allowed for nearshore waves to build to nearly 15 feet.
Read the full account →A stationary front located through northern New Hampshire provided a focus for showers and thunderstorms to develop. Due to the slow movement of the storms rainfall rates were high resulting in flash flooding.
Read the full account →A stationary front located through northern New Hampshire provided a focus for showers and thunderstorms to develop. Due to the slow movement and the training of the storms rainfall rates were high and resulted in flash flooding.
Read the full account →A stationary front located through northern New Hampshire provided a focus for showers and thunderstorms to develop. Due to the slow movement and the training of the storms rainfall rates were high and resulted in flash flooding.
Read the full account →The interaction between a cold frontal boundary and the remnants of Tropical Storm Tammy resulted in tremendous amount of rainfall throughout most of central and southern New Hampshire.
Read the full account →Low pressure moved to the New Jersey coast on the 14th of February and rapidly intensified as it moved through the Gulf of Maine early on the 15th. Storm force northerly winds over the coastal waters allowed for near shore waves to build to nearly 20 feet off Rockingham County.
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