110
Recorded events
0
Direct deaths
0
Direct injuries
$10.2M
Property damage
Flood in Grafton County, New Hampshire: 110 recorded events between 2006 and 2026. The strongest on record measured 0. That places the county #44 nationally and #1 statewide for this hazard.
Decade by decade
Flood in Grafton County, New Hampshire: events per decade
Reporting practice changed over time — early decades are undercounted, not calmer.
The busiest decade for flood in Grafton County is the 2010s, when 69 of the county's 110 recorded events were logged. Comparing decades is useful for spotting active periods, but the earliest years are thin because systematic reporting for this hazard began later.
Within the Grafton County archive, flood makes up 14.2% of all recorded severe weather across 9 hazard types. Nationally the county sits at #44 for this hazard and #1 within New Hampshire, putting it in the 98.5 percentile of all U.S. counties.
Seasonality
Events by month
Apr is the peak month for flood in Grafton County with 25 recorded events, while Jun is the quietest. Seasonality here is a property of the archive as much as the climate: reports cluster where population and spotter networks are densest.
Most recent
Latest recorded events
| Date | Location | Magnitude | Damage |
|---|---|---|---|
| Mar 17, 2026 | WOODSTOCK | — | $0 |
| Apr 12, 2024 | RIVERSIDE ARPT | 0 | $0 |
| Dec 18, 2023 | WOODSTOCK | 0 | $250K |
| Dec 18, 2023 | WING ROAD | 0 | $0 |
| Dec 18, 2023 | BETHLEHEM JCT | 0 | $0 |
| Jul 11, 2023 | HANOVER CENTER | 0 | $0 |
| Jul 10, 2023 | HANOVER | 0 | $0 |
| Jun 17, 2023 | ENFIELD | 0 | $0 |
| Dec 24, 2022 | RIVERSIDE ARPT | 0 | $0 |
| Dec 24, 2022 | QUINCY | 0 | $0 |
Other hazards here
More from Grafton County
- Thunderstorm Wind 399
- Hail 132
- Flash Flood 107
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
Rain and rapid snowmelt resulted on an ice jam on the Pemigewasset River at Plymouth (flood stage 13.0 ft), which flooded a parking lot at Plymouth State University. 48 automobiles where damaged by the high water. The river crested at 15.01 feet.
An ice jam caused minor flooding on the Ammonoosuc River in Bath. Abbott Avenue from Mt Gardiner Road, to 3/4 of a mile downstream, was flooded by several feet of water. Large chunks of ice caused damage to the road. The road remained closed for 3 days.
Thunderstorms produced 3 to 5 inches of rain causing flooding on the Pemigewassett River at Woodstock (flood stage 9.00 ft), which crested at 11.14 feet. Route 175 at Cox Farm Road flooded. Two campgrounds were also flooded.
Quick answers
Frequently asked
How many flood events are on record in Grafton County, New Hampshire?
110 flood events are recorded in Grafton County between 2006 and 2026, causing 0 direct deaths.
What is the strongest flood recorded in Grafton County?
The strongest flood on record in Grafton County measured 0.
Where does the flood data for Grafton County come from?
All events come from the NOAA/NCEI Storm Events Database, the federal public-domain archive of severe weather reports. Dates are UTC, damage is as reported and not inflation-adjusted, and the most recent entries may still be revised.
Cite this page
“Flood in Grafton County, New Hampshire.” Severe Weather History. severeweatherhistory.com/county/new-hampshire/grafton-county/flood/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.