Saturday, July 8th through Monday, July 10th was an active weather period with numerous rounds of heavy rainfall moving across the state.  Thunderstorms developed during the afternoon of Saturday, July 8th with scattered thunderstorms from the White Mountains down through the Monadnocks.  Storms came to an end during the evening hours. Localized 3-hr rainfall totals ranged from 1 to 3���, but no flooding was reported.
There was a short break in rainfall activity the night of July 8th through noon on July 9th, before a cluster of showers and thunderstorms developed around noon on Sunday across Cheshire County.  The storms continued to train over the same region with storms repeatedly hitting the same areas in Cheshire County.  Thunderstorms and showers expanded in aerial coverage across western New Hampshire through the late evening.  The rain ended in the hardest hit areas of Cheshire County by 9 PM on July 9th.
After a brief lull in the rainfall activity around midnight, rainfall activity began to increase once again during the early morning hours of July 10th.  A large area of rainfall pushed into Western New Hampshire as an area of low pressure moved into Northern New England.  Rainfall was light with areas of moderate rainfall rates through the morning hours of July 10th. Overall rainfall rates were not as heavy as previous days but the rain was more widespread and constant across the Connecticut River Valley region of New Hampshire.  There was a short lull in rainfall across Southwest New Hampshire during the afternoon hours, before a heavy band of heavy rain showers with intense rainfall rates pushed through the region during the evening of July 10th.  Rainfall rates up 1 to 1.25��� per/hour were reported with this band.  Additional flooding was reported as saturated soils led to rapid run-off, especially in Sullivan and Northern Cheshire County.

Flood in GRAFTON, NEW HAMPSHIRE
From 10-JUL-23 15:00:00 to 11-JUL-23 22:00:00 (EST-5)
Location: HANOVER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

The Connecticut River at West Lebanon flooded between July 10-11. The USGS river gage at West Lebanon has a flood stage of 22 feet and crested at 22.9 feet on the 11th.  The river was out of banks and caused minor inundation of a showing plaza parking lot and property adjacent to the publics water department in Lebanon.

Flash Flood in CHESHIRE, NEW HAMPSHIRE
From 09-JUL-23 14:05:00 to 09-JUL-23 16:00:00 (EST-5)
Location: FOREST LAKE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Heavy rainfall measured around 4.5 inches caused the closure of main thruway Route 10 near Kapper Drive in Winchester on the afternoon of the 9th. An extensive washout on Route 10 required lengthy repairs to a 600 foot section of the road.

Flood in CHESHIRE, NEW HAMPSHIRE
From 10-JUL-23 20:00:00 to 10-JUL-23 21:00:00 (EST-5)
Location: SURRY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The Ashuelot River flooded Gilsum Road between Gilsum and Surry. The USGS river gage at Gilsum crested at 11.36 feet. The gage has a period of record of 100 years, and this event's crest was the 5th highest. No official flood stages are known, but the rarity of the discharge of 7,410 cfs is reported to have an annual exceedance probability of 0.2% a year.

Flood in MERRIMACK, NEW HAMPSHIRE
From 10-JUL-23 23:00:00 to 11-JUL-23 10:00:00 (EST-5)
Location: WEST SALISBURY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The Blackwater River came out of banks and flooded portions of Route 4 in Andover between Plains Road and NH-11. The flooding was the result of multiple rounds of heavy rainfall over a 7 day period, tipped over into flooding by 1 to 3 inches of rainfall on the 10th. The river was slow to rise and slower to recede.

Flood in SULLIVAN, NEW HAMPSHIRE
From 10-JUL-23 19:00:00 to 11-JUL-23 00:00:00 (EST-5)
Location: WASHINGTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flooding on Long Pond and Lempster Mountain Road in Lempster caused by overflow of the headwaters of the Ashuelot River.

Flood in HILLSBOROUGH, NEW HAMPSHIRE
From 10-JUL-23 20:00:00 to 11-JUL-23 20:00:00 (EST-5)
Location: NORTH BRANCH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Island Pond in Cheshire County reached significant levels following multiple rounds of heavy rainfall. Properties along the lake in Stoddard were flooded. On the evening of the 10th officials released water at the Island Pond Dam in Stoddard, which caused the water in the North Branch to overtop the Liberty Farm Road bridge in Antrim through the 11th. This cut off access to 18 homes.

Flash Flood in CHESHIRE, NEW HAMPSHIRE
From 09-JUL-23 14:22:00 to 09-JUL-23 16:00:00 (EST-5)
Location: SWANZEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

After multiple days of heavy rainfall, Swanzey Lake overflowed on July 9th. The flooding caused Swanzey Lake Road to washout and necessitated the evacuation of lakeshore residents.  Fire Department responded with the City of Keene (Cheshire County) swift water rescue team. This caused over 100 vehicles to become stranded and then required the evacuation of nearly 150 guests of the Pilgrim Pines Camp and Retreat Center.

Flash Flood in CHESHIRE, NEW HAMPSHIRE
From 10-JUL-23 16:00:00 to 10-JUL-23 17:00:00 (EST-5)
Location: WESTMORELAND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Heavy rain caused the Partridge Brook to flood and washout a portion of Partridge Brook Road in Westmoreland.

Flood in SULLIVAN, NEW HAMPSHIRE
From 10-JUL-23 20:00:00 to 11-JUL-23 22:00:00 (EST-5)
Location: EAST UNITY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Overflow from Gilman Pond combined with local runoff caused the Spring Brook to come out of banks. The Brook flooded Unity Springs Road where a water rescue was conducted.

Flood in COOS, NEW HAMPSHIRE
From 10-JUL-23 19:00:00 to 10-JUL-23 20:00:00 (EST-5)
Location: WHITEFIELD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Jefferson Road flooded with one lane closed due to heavy rain on the afternoon of the 10th.

Flood in SULLIVAN, NEW HAMPSHIRE
From 10-JUL-23 21:30:00 to 11-JUL-23 05:00:00 (EST-5)
Location: LEMPSTER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flooding reported along the headwaters of the Cold River in Lempster. Flooding was observed from Unity Springs Road to Benway Road with all lanes closed on 2nd NH Turnpike.

Flood in SULLIVAN, NEW HAMPSHIRE
From 10-JUL-23 19:49:00 to 11-JUL-23 00:00:00 (EST-5)
Location: WENDELL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Lake Sunapee reached a record highest level for the time of year in July.  Water releases from the lake into the Sugar River caused flooding on Brook Road between Natures Way and NH RT 103. Other roads flooded include Reeds Mill Road from Old Springfield Road to NH103.

Flash Flood in COOS, NEW HAMPSHIRE
From 11-JUL-23 03:00:00 to 11-JUL-23 04:00:00 (EST-5)
Location: PITTSBURG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Heavy rain over saturated ground caused a washout to the southbound lane of US-3 at mile 227.4 in Pittsburg.

Flood in GRAFTON, NEW HAMPSHIRE
From 10-JUL-23 20:55:00 to 10-JUL-23 22:00:00 (EST-5)
Location: HANOVER CENTER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Heavy rain over saturated ground led to flooding on Pinneo Hill Road near Lyme Road in Hanover.

Flood in MERRIMACK, NEW HAMPSHIRE
From 10-JUL-23 21:00:00 to 12-JUL-23 02:00:00 (EST-5)
Location: DANBURY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The Smith River came out of banks and flooded Bohannon Road, Eastern District Road, North Road, Sheep Rock Road, and Spa Road. The floodwaters were slow to rise and slow to recede.

Flood in SULLIVAN, NEW HAMPSHIRE
From 11-JUL-23 00:00:00 to 12-JUL-23 00:00:00 (EST-5)
Location: SUNAPEE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Lake Sunapee reached a record level for summer resulting in floodings of lakeshore properties. Outbuildings and docks were impacted by floodwaters.

Flash Flood in CHESHIRE, NEW HAMPSHIRE
From 09-JUL-23 16:00:00 to 09-JUL-23 21:00:00 (EST-5)
Location: SWANZEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Severe widespread flooding in Swanzey prompted Police to issue a statement Please avoid driving in Swanzey at this time. Numerous roads across the community were flooded and damaged by floodwaters including Route 10, Holbrook Avenue, Old Homestead Highway, East Shore, and Carlton Roads, along with several others.

Flash Flood in SULLIVAN, NEW HAMPSHIRE
From 10-JUL-23 18:00:00 to 11-JUL-23 00:00:00 (EST-5)
Location: MARLOW JCT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

The Cold River came out of banks on the evening of the 10th following heavy rains. The river had been running high due to multiple rounds of heavy rain over the previous few days. After approximately 1 to 3 inches of additional rain that afternoon, the river spiked to the second highest level on record at the Alstead USGS river gage (period of record 2010-2023). The river crested at 11.67 feet, with a discharge of 10,300 cfs. The flow recorded has an annual exceedance probability between 1% and 0.2% levels.  The high flowing water came out of banks along Route-123A in South Acworth and Acworth Road in Alstead. Acworth Fire Chief rescued 12 people from their homes on Route 123A. He said several cars were swept by water but there were no injuries in those incidents. The floodwaters caused damage to the southbound lane on Acworth Road. In Lempster South Road and River Road were flooded.

Flash Flood in CHESHIRE, NEW HAMPSHIRE
From 10-JUL-23 19:15:00 to 10-JUL-23 21:00:00 (EST-5)
Location: EAST ALSTEAD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flooding caused by the significant rainfall over two days damaged property and roads in the Marlow area.  Most roads were closed due to flooding and residents were advised to stay home.  The flooding produced on the 10-11th of July occurred over areas that were already dealing with previous flooding. The North Fork of the already flooded Ashuelot River flooded portions of Marlow. Another source of flooding came when the Stoddard Lake overflowed totally surounding homes.

Flood in SULLIVAN, NEW HAMPSHIRE
From 10-JUL-23 03:49:00 to 10-JUL-23 05:00:00 (EST-5)
Location: LANGDON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Heavy rain during the afternoon of the 9th caused overnight flooding of the Great Brook in Langdon. The Brook flooded Old Stage Road.

Flash Flood in CHESHIRE, NEW HAMPSHIRE
From 10-JUL-23 03:05:00 to 10-JUL-23 04:00:00 (EST-5)
Location: FOREST LAKE
Flood cause: Dam / Levee Break
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Following several days of heavy rainfall caused a breach in the Forest Lake Road dam. The initial breach caused flooding on Route 10, and then flowed into the Ashuelot River where the flood wave dampened.

Flood in MERRIMACK, NEW HAMPSHIRE
From 11-JUL-23 03:45:00 to 12-JUL-23 13:00:00 (EST-5)
Location: HENNIKER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

The Contoocook River exceeded flood stage on the 11th following multiple rounds of heavy rain across the watershed. The USGS river gage at Henniker exceeded flood stage of 12.0 feet cresting at 12.36 feet. Impacts were considered minor with floodwaters up to Henniker Street and Bear Hill Road in Hillsborough.

Flood in CARROLL, NEW HAMPSHIRE
From 11-JUL-23 00:00:00 to 12-JUL-23 00:00:00 (EST-5)
Location: NORTH CONWAY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

The Saco River came out of banks on July 11th following heavy rain showers. The USGS river gage at Conway exceeded the flood stage of 9 feet, cresting at 9.4 feet on the 11th. The impacts were mainly focused at low lying campgrounds and flooding at Transvale Road.

Flood in SULLIVAN, NEW HAMPSHIRE
From 09-JUL-23 20:34:00 to 09-JUL-23 22:30:00 (EST-5)
Location: WASHINGTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Main thoroughfare NH-31 closed from Windsor town line to East Washington Road due to water over the roadway.

Flood in CHESHIRE, NEW HAMPSHIRE
From 11-JUL-23 02:00:00 to 11-JUL-23 22:00:00 (EST-5)
Location: WALPOLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

The Connecticut River at Walpole flooded on July 11. The USGS river gage at West Walpole has a flood stage of 28 feet and crested at 28.2 feet on the 11th.  The river was out of banks and caused minor inundation along the river from Walpole and Westminster downstream to the Massachusetts border. Portions of low-lying agricultural lands adjacent to river were inundated. The most impactful flooding was in Brattleboro, however that was primarily caused by flooding from the Whetstone Brook which is a tributary to the Connecticut River.

Flash Flood in CHESHIRE, NEW HAMPSHIRE
From 08-JUL-23 19:45:00 to 08-JUL-23 20:30:00 (EST-5)
Location: NELSON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Local Official

Heavy rain on the afternoon of July 8th caused flooding on Tolman Pond and Bancroft Roads in Nelson. Some damage to the roads were reported, along with numerous private roads impacted.

Flash Flood in CHESHIRE, NEW HAMPSHIRE
From 09-JUL-23 17:55:00 to 09-JUL-23 19:00:00 (EST-5)
Location: SOUTH STODDARD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Heavy rain on the afternoon of the 9th caused several washouts along Graine Lake Road in Nelson. Murdough Hill Road also closed due to a washout.

Flash Flood in SULLIVAN, NEW HAMPSHIRE
From 10-JUL-23 20:15:00 to 10-JUL-23 22:00:00 (EST-5)
Location: LANGDON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Multiple rounds of heavy rain caused a washout on Currier Road in Langdon on the afternoon of the 10th. Rainfall that afternoon was estimated between 1 to 2 inches, however saturated ground and recent heavy rain contributed to the severity of the flooding.

Flash Flood in CHESHIRE, NEW HAMPSHIRE
From 10-JUL-23 19:49:00 to 10-JUL-23 21:00:00 (EST-5)
Location: ALSTEAD CENTER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Hill Road flooded from Darby Brook near Drewsville Road.

Flash Flood in GRAFTON, NEW HAMPSHIRE
From 10-JUL-23 21:10:00 to 10-JUL-23 21:30:00 (EST-5)
Location: ENFIELD CENTER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several damaged and washed out roads in Enfield-Canaan area. South road was damaged between Potato Road and Grist Mill Road.

Flash Flood in MERRIMACK, NEW HAMPSHIRE
From 08-JUL-23 20:45:00 to 08-JUL-23 21:40:00 (EST-5)
Location: HENNIKER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Heavy rain on the evening of July 8th caused Western Avenue to close due to flooding near New England College.  Additional flooding was observed along Hall and Gould Street.

Flood in SULLIVAN, NEW HAMPSHIRE
From 10-JUL-23 19:45:00 to 11-JUL-23 22:00:00 (EST-5)
Location: PUCKERSHIRE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

The Sugar River overflowed its banks between the 10th-11th. The flood stage for the USGS river gage at Claremont has a flood stage of 7.0 feet, and on the 11th the river crested at 8.49 feet. A campground in Newport was inundated by floodwaters. Corbin Road from NH10 to the covered bridge flooded.