On July 4, showers and thunderstorms developed across most of the state around noon. The line of storms across southern New Hampshire contained localized downpours that dropped 2 to 3 over a 3 hour period in Stoddard and Wolfeboro.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
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.
The episode as NWS GYX wrote it up.
On July 4, showers and thunderstorms developed across most of the state around noon. The line of storms across southern New Hampshire contained localized downpours that dropped 2 to 3 over a 3 hour period in Stoddard and Wolfeboro. Additional flooding was reported in both of these towns during the early afternoon hours with road flooding and erosion damage being reported. Across northern New Hampshire isolated thunderstorm downpours were estimated to drop up to 2 in an hour in the rural mountains of Coos County and near Mount Moosilauke in the White Mountains National Forest. Heavy rain showers and thunderstorms were isolated into the evening hours in the Connecticut River Valley but no additional flooding was reported in these areas. In addition, a few isolated storms around the state become severe with sporadic tree damage due to wind damage, along with a few reports of low end severe hail.
The Boston radar (KBOX), 130 km away, was scanning. The volume nearest the first event began at 03:35 UTC.
13 flash flood, 2 thunderstorm wind, 1 astronomical low tide. Local standard time, as filed.
A thunderstorm brought heavy rain to the Monadnock Mountain region causing flash flooding in Troy. Rainfall rates peaked around 3 inches per hour and estimated between 1 to 3 inches fell in the Troy area. Russell Rd washed out from hillside runoff. Monadnock Street at Nelson Street closed due to flooding.
A storm brought torrential rainfall south of Swanzey on the evening of the 3rd. Swanzey Lake Road washed out near Dunn Hill Road. Radar estimated rainfall between 1 to 3 inches fell within an hour shortly before midnight.
Torrential rainfall with rates over 3 inches per hour fell across southern New Hampshire. This rain fell over ground that was already wet from heavy rain the day before. Unofficial gage networks in the community of Rindge measured 3.80 inches. A washout occurred on School Street and other roads in town.
A thunderstorm brought heavy rain to the Monadnock Mountain region causing flash flooding between Troy and Jaffrey. Rainfall rates peaked around 3 inches per hour and estimated between 1 to 3 inches fell across the area. State Route NH-124 near Bollard Road in Jaffrey had shoulder damage due to wash-outs from flooding.
Falls Brook came out of banks and flooded Hale Hill Road on the evening of July 3rd. A small thunderstorm intensified over East Swanzey with high rainfall rates peaking around 3 inches per hour. The radar estimated 2 to 3 inches of storm total precipitation over the headwaters of Falls Brook in the Little Monadnock Mountains.
A severe thunderstorm dropped hail the size of quarters in Claremont.
Law enforcement reported basement flooding of Stoddard residents up to 3 feet deep.
Showers with heavy rainfall rates formed over the White Mountains with rates up to 3 inches per hour. In Dixville Township, Golf Link Road washout cutting off access to private properties. Valley Road inaccessible due to flooding.
Heavy rainfall with rates over 3 inches and hour caused Youngs Brook to overflow its banks. The Brook flooded Browns Ridge Road at Youngs Road in Ossipee.
Showers with rainfall rates up to 3 inches and hour moved across Nelson on the 4th. Washouts were reported on Log Cabin Road and Old Stoddard Road.
Severe washouts on Center Pond Road flooded after torrential rain fell with rates up to 3 inches per hour.
Rain with torrential rainfall rates up to 3 inches per hour caused washouts on Barrett Pond Road.
Severe thunderstorm outflow winds downed a few trees along with large tree branches in Colebrook on Hughes Road.
Torrential rain caused washouts on Pine Hill Road and Cape Moonshine Road in Warren. Radar estimated rainfall rates up to 3 inches per hour.
Heavy rain caused multiple washouts on Pine Hill Road and Cape Moonshine Road in Haverhill.
Severe thunderstorm outflow winds downed trees on State Route 114 in New Sutton.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New Hampshire in 2023Every state in 2023This day in weather historyWarnings in New Hampshire, July 2023
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 2026-09-30. Each event’s entry at NCEI: 1123611, 1123614, 1123621, 1123613, 1123590, 1127638, 1123632, 1123628, 1123622, 1123629, 1123630, 1123631, 1127636, 1123634, 1123633, 1127637.