FloodZoneMap.org

Flood — Grafton, NH

May 13, 2006

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. The Pemigewasset River at Bristol (flood stage 8.0 ft.) crested at 11.4 ft. The Saco river at Conway (flood stage 9.0 ft.) crested at 9.4 ft. The Merrimack River at Concord (flood stage 14.0 ft.) crested at 15.1 ft. The Warner River at Davisville (flood stage 8.0 ft.) crested at 12.3 ft. The Contoocook River (flood stage 12.0 ft.) crested at

Source: NOAA National Weather Service Storm Events Database (event 5510712). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Grafton, NH

This event is one of many recorded floods in Grafton County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.

View Grafton County flood data →

More Flood Stories

Flash Flood1 death$1.5M damage

Grafton, NH · Jun 27, 1998

From 3 to possibly as much as 6 inches of rain fell in 12 hours causing the Baker River and its tributaries to rise very rapidly. Bridges were destroyed, vehicles were washed away, and some towns were completely isolated as all roads in and out of the towns were flooded.

Read the full account →
Flood$250K damage

Grafton, NH · Dec 18, 2023

Low pressure began organizing in the Gulf of Mexico on the 16th, setting record low sea level pressures as it traversed the Southeast through the 17th.

Read the full account →
Flash Flood$6.0M damage

Grafton, NH · Jul 1, 2017

A very strong shortwave and associated cold front were approaching from the west on the morning of July 1st. Ahead of the front, a very warm and moist air mass was in place over New England with values of precipitable water around 2 inches.

Read the full account →
Flash Flood$4.0M damage

Grafton, NH · Jul 1, 2017

A very strong shortwave and associated cold front were approaching from the west on the morning of July 1st. Ahead of the front, a very warm and moist air mass was in place over New England with values of precipitable water around 2 inches.

Read the full account →