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Merrimack County, New Hampshire
Tornadoes, hail, floods and severe storms recorded here between 1962 and 2026, from NOAA's Storm Events Database. Search an address to see which tornadoes came closest to it.
7
Tornado reports
101
Hail reports
111
Floods since 1996
774
All events
2
Deaths
$19.0M
Property damage
Tornado paths in Merrimack County
The part of each tornado’s path NOAA recorded in this county, 7 in all. Zoom in and the paths widen to their surveyed width.
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Year by year
All storm eventsTornadoes
NOAA's storm database records tornadoes back to 1950 and hail and thunderstorm wind back to 1955, but floods only from 1996 on. Older floods are missing here. For those, the U.S. Geological Survey's stream gauge records and flood reports are the place to look.
Most significant events
The strongest tornadoes, deadliest events and biggest damage here, up to 50.
Increasing winds capsized a sailboat during a boat race on Lake Sunnapee, drowning the captain. The winds, estimated at 50 mph, were apparently associated with a thunderstorm gust front. (M59O)
Heavy rain caused county wide flooding of small rivers and streams in Merrimack County New Hampshire.
Hail Hail
Severe thunderstorms dropped hail the size of quarters in Pembroke.
Hail Hail
Severe thunderstorms dropped hail the size of golf balls in New London.
Hail Hail
Severe thunderstorms dropped hail the size of limes 5 to 6 minutes in Contoocook. Cracked windshield and dented a car hood.
Hail Hail
Severe thunderstorms dropped hail the size of quarters in Hopkinton.
Hail Hail
Severe thunderstorms dropped hail the size of quarters near Bow.
Thunderstorm Wind Thunderstorm Wind
Severe thunderstorm outflow winds downed trees blocking Baker Hill Rd. in Newbury.
Thunderstorm Wind Thunderstorm Wind
Severe thunderstorm outflow winds downed trees on wires on Birch Hill Rd. in Bradford.
Thunderstorm Wind Thunderstorm Wind
Severe thunderstorm outflow winds downed trees and partially blocking Kearsage Mountain Rd. in Warner.
Thunderstorm Wind Thunderstorm Wind
Severe thunderstorm outflow winds downed 2 trees and large branches in Hopkinton.
Thunderstorm Wind Thunderstorm Wind
Severe thunderstorm outflow winds downed trees on Whitehall Road in Hooksett, no wires down.
Thunderstorm Wind Thunderstorm Wind
Severe thunderstorm outflow winds downed trees and wires blocking Peverly Rd. in Northfield.
Drought Drought
The USDM on April 28 had 59% of Merrimack County in Severe Drought (D2), and by the end of May severe drought slightly eased to 56%, with 44% in Moderate Drought (D1). May rainfall averaged 5.99 inches, well above normal by 2.46'. However, one wet May wasn't enough to wipe out ex…
Drought Drought
Merrimack County averaged 3.58 inches of precipitation in April, approximately an inch below normal. The USDM on March 31st had 59% of the county in Severe Drought (D2) and 31% in Moderate Drought (D1), by the end of the month moderate drought expanded to 41% and severe drought r…
Drought Drought
Merrimack County averaged 3.23 inches of precipitation in March, approximately 0.27 inches below normal, marking the 5th driest June through March stretch with deficits around 8 inches. The USDM on March 31st had 59% of the county in Severe Drought (D2) and 31% in Moderate Drough…
Drought Drought
Merrimack County averaged 1.24 inches of precipitation in February, approximately 1.63 inches below normal, marking the 7th driest December'February stretch. The USDM on February 24th had 85% of the county in Severe Drought (D2) and 15% in Moderate Drought (D1).
Winter Storm Winter Storm
Snow overspread the Merrimack Valley by midday on the 25th. Within an hour or two snow was moderate to heavy at times as an intense band of lift moved into the region. Snowfall rates were one to two inches per hour during the heavy snow. Snow continued overnight into the 26th, wi…
Drought Drought
January can be summarized by a frozen cap effect as well below normal temperatures and significant frost depths prevented any meaningful sub-surface water recharge. In addition, precipitation remained below normal for the entire region for the month. This led to a lower than norm…
Winter Storm Winter Storm
Precipitation began in the very early morning hours on the 29th, and began mainly as freezing rain except for a few spots that started as snow. The freezing rain was heaviest and accumulated most rapidly through the morning hours. It was around this time that trees and wires bega…
Winter Weather Winter Weather
Snow squalls arrived in the Merrimack Valley during the afternoon of the 4th. At 401 pm the Concord Municipal Airport reported visibility falling to 1/4 mile and winds gusting to 46 mph. The squalls lasted about 30 to 45 minutes before conditions improved. Snowfall amounts were g…
Winter Storm Winter Storm
Snow overspread the Merrimack Valley on the morning of the 2nd. A nearly stationary band of snow set up over the upper part of the valley through the afternoon, with moderate to heavy snow at times. Snow tapered off late in the evening on the 2nd. Snowfall totals range from 6 to …
Drought Drought
Merrimack County averaged 1.95 inches of precipitation in December, approximately 2.0 inches below normal, making it the 3rd driest July'December on record. Private well failures in Bow and Dunbarton escalated, with one local driller reporting over 25 calls daily in mid-December.…
Drought Drought
Merrimack County averaged 2.17 inches of precipitation in November, approximately 2 inches below normal. The rainfall deficits carried over from summer grew near 6 inches, making it the 3rd driest stretch between July through November on record. The USDM on November 25th had 30% …
Hail Hail
A severe thunderstorm dropped hail the size of quarters in a food store parking lot north of Manchester.
Thunderstorm Wind Thunderstorm Wind
Severe thunderstorm wind gusts downed a large tree on a car in Hooksett.
Thunderstorm Wind Thunderstorm Wind
Severe thunderstorm wind gusts downed a tree down onto wires and house on Deerfield Rd. in Allenstown.
Thunderstorm Wind Thunderstorm Wind
Severe thunderstorm wind gusts downed trees and wires on west side of Henniker.
Drought Drought
Merrimack County averaged 2.87 inches of precipitation in September, approximately an inch below normal. The rainfall deficits carried over from summer grew near 5 inches, making it the 2nd driest stretch between July through September on record. The USDM on September 30th had 10…
Hail Hail
Large hail associated with a severe thunderstorm dropped hail the size of ping pong balls, shattering a car wind window in Hill.
Thunderstorm Wind Thunderstorm Wind
Severe thunderstorm outflow winds downed a tree down onto a house in Hill.
Thunderstorm Wind Thunderstorm Wind
Severe thunderstorm outflow winds downed trees and wires in Northfield.
Hail Hail
A severe thunderstorm dropped hail the size of half dollars in Danbury.
Thunderstorm Wind Thunderstorm Wind
Severe thunderstorm outflow winds downed wires as well as trees and large branches across Waukeena Lake Rd. and Sedgewick Rd. in Danbury.
Thunderstorm Wind Thunderstorm Wind
Severe thunderstorm outflow winds downed trees and wires on US Route 4 and Ford Mill Rd. in Fords Crossing village.
Flash Flood Flash Flood
In Henniker, highway and road management reported road damage from flooding along Bear Hill Road, Ray Road, Hemlock Corner Loop and parts of Dodge Hill Road due to heavy downpours dropping around 3 inches of rain on saturated soils.
Thunderstorms moved through the Henniker area on the afternoon of June, 6th. The storms were not severe in nature, but a few where strong with abundant lightning. A women who was outside at the time of the storm was struck by lighting near a vehicle. She was last reported in crit…
Hail Hail
A severe thunderstorm dropped hail the size of quarters on Old Hopkinton Rd. in Hopkinton.
Hail Hail
A severe thunderstorm dropped hail the size of quarters in North Sutton.
Hail Hail
A severe thunderstorm dropped hail the size of quarters north of Boscawen.
Hail Hail
A severe thunderstorm dropped hail the size of half dollars in Dunbarton.
Hail Hail
A severe thunderstorm dropped hail the size of half dollars in Bow.
Thunderstorm Wind Thunderstorm Wind
Severe thunderstorm outflow winds downed a few small trees down across Clement hill Rd. in Bow.
Thunderstorm Wind Thunderstorm Wind
Severe thunderstorm outflow winds downed trees on NH Route 127 near Contoocook State Forest.
Flood Flood
Locally heavy rain around 3 inches on saturated soils caused NH Route 103 and NH Route 127 to flood due to the Warner River coming out of its banks in Davisville.
Events by year, as a table
| Year | Events | Tornadoes |
|---|---|---|
| 2026 | 17 | 0 |
| 2025 | 33 | 0 |
| 2024 | 18 | 0 |
| 2023 | 18 | 0 |
| 2022 | 18 | 0 |
| 2021 | 15 | 0 |
| 2020 | 21 | 0 |
| 2019 | 8 | 0 |
| 2018 | 42 | 1 |
| 2017 | 21 | 0 |
| 2016 | 10 | 0 |
| 2015 | 16 | 1 |
| 2014 | 23 | 0 |
| 2013 | 21 | 0 |
| 2012 | 21 | 0 |
| 2011 | 22 | 0 |
| 2010 | 28 | 0 |
| 2009 | 17 | 0 |
| 2008 | 32 | 1 |
| 2007 | 41 | 0 |
| 2006 | 22 | 0 |
| 2005 | 30 | 0 |
| 2004 | 18 | 0 |
| 2003 | 13 | 0 |
| 2002 | 32 | 0 |
| 2001 | 36 | 0 |
| 2000 | 28 | 0 |
| 1999 | 46 | 1 |
| 1998 | 26 | 0 |
| 1997 | 8 | 0 |
| 1996 | 24 | 0 |
| 1995 | 4 | 0 |
| 1994 | 3 | 0 |
| 1991 | 4 | 0 |
| 1990 | 2 | 0 |
| 1989 | 3 | 0 |
| 1988 | 2 | 0 |
| 1987 | 2 | 0 |
| 1986 | 6 | 0 |
| 1985 | 1 | 0 |
| 1984 | 1 | 0 |
| 1983 | 1 | 0 |
| 1981 | 1 | 0 |
| 1976 | 4 | 1 |
| 1975 | 2 | 0 |
| 1972 | 2 | 1 |
| 1971 | 5 | 0 |
| 1968 | 1 | 0 |
| 1967 | 1 | 1 |
| 1966 | 1 | 0 |
| 1963 | 1 | 0 |
| 1962 | 2 | 0 |
Search your address
See every tornado that passed within 25 miles of a place in Merrimack County, measured to its path.
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