Flood, Grafton
- When
- June 17, 12:57 PM EST to 1:45 PM EST
- Where
- Grafton County, 1.3 mi SSE of Enfield to Enfield
- Cause
- Heavy Rain
- Reported by
- Department of Highways
- Coordinates
- 43.633, -72.140
Road shoulder washout on Route 4 in Enfield.
Flash Flooding and Flood in New Hampshire, June 17, 2023
A slow moving area of low pressure was centered over Southern Vermont on the morning of the 17th. Around mid-morning a band of heavy rain showers with embedded thunderstorms developed from Lebanon to Jaffrey.
Where it happened
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 5
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.
What happened
The episode as NWS GYX wrote it up.
A slow moving area of low pressure was centered over Southern Vermont on the morning of the 17th. Around mid-morning a band of heavy rain showers with embedded thunderstorms developed from Lebanon to Jaffrey. The band pivoted over the same region bringing nearly continuous moderate to periods of heavy rainfall through mid-afternoon. Most areas received 1 to 2.5 inches of rain across southwest New Hampshire, but there were localized areas of 3 or more inches of rain reported from unofficial gauges. Additional light rainfall occurred through the evening hours in the flood hit area before ending completely by midnight. The majority of the rainfall and excessive runoff damage all occurred in a 6-hour period from 9 am to 3 pm on June 17th.
The radar
The Burlington radar (KCXX), 128 km away, was scanning. The volume nearest the first event began at 17:54 UTC.
Event by event
4 flash flood, 1 flood. Local standard time, as filed.
Flash Flood, Sullivan
- When
- June 17, 1:37 PM EST to 3:30 PM EST
- Where
- Sullivan County, 0.82 mi S of Wendell to 0.49 mi NE of Wendell
- Cause
- Heavy Rain
- Reported by
- Department of Highways
- Coordinates
- 43.368, -72.119
NH Route 11 had 2 to 3 feet of water over the road.
Flash Flood, Sullivan
- When
- June 17, 1:45 PM EST to 2:30 PM EST
- Where
- Sullivan County, Meriden to 2.15 mi WSW of East Plainfield
- Cause
- Heavy Rain
- Reported by
- Department of Highways
- Coordinates
- 43.550, -72.270
Grantham Mountain Road in Meriden, N.H. nearing the intersection with Route 120 was washed out in the afternoon of the 17th. The flood washed out over 300 feet of road material, including asphalt, with crevices of as much as 10-feet deep in some places. Radar estimated about 3 inches of rain fell between 2:30 p.m. and 4:30 p.m. The rain flooded Bloods Brook, which runs parallel to Grantham Mountain Road before entering a large culvert, approximately 4 feet in diameter, that passes underneath the road. The culvert was overwhelmed and the road subsequently damaged.
Flash Flood, Sullivan
- When
- June 17, 2:45 PM EST to 3:30 PM EST
- Where
- Sullivan County, 1.23 mi N of Newport Parlin Arpt to 2.07 mi S of Newport
- Cause
- Heavy Rain
- Reported by
- Department of Highways
- Coordinates
- 43.398, -72.178
In Newport, stormwater flooded the drainage system on Sand Hill Road, washing away about 150 feet of the dirt road. The washout affected a handful of homeowners who lived on the dead-end portion of the road. A half-dozen other roads, including Fletcher Road and a portion of Maple Street, also were also washed away.
Flash Flood, Sullivan
- When
- June 17, 3:45 PM EST to 4:30 PM EST
- Where
- Sullivan County, Croydon to 1.47 mi SW of Grantham
- Cause
- Heavy Rain
- Reported by
- Department of Highways
- Coordinates
- 43.450, -72.170
Heavy rainfall estimated by radar between 2 and 3 inches fell during the early afternoon of June 17. In Croydon several roads were flooding including Brighton Road, Winter Road and Croydon Brook Road. Croydon Brook Road sustained washouts.
What these are
- Flood
- Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.
- Flash Flood
- Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Tornadoes and Flash Flooding in Colorado, June 17 to 22, 2023
- Tornadoes and Damaging Winds in Oklahoma, June 17 to 18, 2023
- Heat in Arizona, June 17 to 18, 2023
- Tornado and Damaging Winds in Arkansas, June 17 to 18, 2023
- Tornadoes and Hail in Oklahoma, June 17, 2023
- Excessive Heat in Louisiana, June 17 to 20, 2023
- Excessive Heat in Texas, June 17 to 20, 2023
- Damaging Winds in Oklahoma, June 17, 2023
- Rip Currents in North Carolina, June 17, 2023
- Heat in Nevada, June 17, 2023
- Damaging Winds in Arkansas, June 17 to 18, 2023
- Hail and Damaging Winds in Louisiana, June 17, 2023
More
Every storm in New Hampshire in 2023Every state in 2023This day in weather historyWarnings in New Hampshire, June 2023
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 2026-10-01. Each event’s entry at NCEI: 1108942, 1108939, 1108938, 1108940, 1108941.