Storm History: Merrimack County, New Hampshire
Every storm the National Weather Service has filed in Merrimack County, New Hampshire: floods, hail, damaging wind, tornadoes, winter storms, heat and the rest, with the most serious on record. Events filed by forecast zone count for every county the zone covers.
The record
- Events
- 774
- Deaths
- 2
- Injuries
- 20
- Damage
- $28 million
- Episodes
- 544
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.
Every year
By kind of event
Counted under the kind that heads each episode.
| Kind of event | Events | Deaths | Injuries | Damage |
|---|---|---|---|---|
| Hail | 186 | 0 | 0 | $124,000 |
| Heavy Snow | 119 | 0 | 0 | |
| Thunderstorm Wind | 117 | 1 | 2 | $70,000 |
| Flood | 79 | 0 | 0 | $6.4 million |
| Flash Flood | 43 | 0 | 0 | $3.1 million |
| Tornado | 40 | 0 | 10 | $178,000 |
| Winter Storm | 36 | 0 | 0 | |
| Strong Wind | 31 | 1 | 1 | $5,000 |
| Winter Weather | 22 | 0 | 0 | |
| Drought | 21 | 0 | 0 | $9.6 million |
| High Wind | 20 | 0 | 1 | $15,000 |
| Lightning | 17 | 0 | 3 | $3.6 million |
| Cold/Wind Chill | 14 | 0 | 0 | |
| Extreme Cold/Wind Chill | 7 | 0 | 0 | |
| Debris Flow | 5 | 0 | 1 | $106,000 |
| Blizzard | 4 | 0 | 0 | |
| Ice Storm | 3 | 0 | 1 | $5.2 million |
| Heavy Rain | 2 | 0 | 0 | |
| Heat | 2 | 0 | 0 | |
| Tropical Storm | 2 | 0 | 1 | $5,000 |
| Freezing Fog | 1 | 0 | 0 | |
| Coastal Flood | 1 | 0 | 0 | |
| Frost/Freeze | 1 | 0 | 0 | |
| Excessive Heat | 1 | 0 | 0 |
The deadliest
The costliest
Damage within this county, in the dollars of its year.
- Drought, November 1, 2020
- Ice Storm, January 7, 1998
- Lightning, July 9, 1997
- Flash Flood, October 20, 1996
- Flood, February 25, 2010
- Ice Storm, December 11, 2008
- Flood, October 8, 2005
- Flood, April 16, 2007
- Flood, August 28, 2011
- Flood, May 13, 2006
- Drought, October 1, 2020
- Flood, March 14, 2010
- Flood, April 3, 2005
- Flash Flood, June 16, 1998
- Lightning, July 22, 1999
- Tornado, July 24, 2008
- Lightning, June 14, 2005
- Flash Flood, June 29, 2005
- Debris Flow, October 29, 2012
- Flood, September 6, 2008
The largest hail
The largest stone in each episode, which may have fallen in a neighboring county of the same episode.
The strongest tornadoes
Every episode, newest first
- Hail, June 26, 2026
- Thunderstorm Wind, June 18, 2026
- Drought, May 1, 2026
- Drought, April 1, 2026
- Drought, March 1, 2026
- Drought, February 1, 2026
- Winter Storm, January 25, 2026
- Drought, January 1, 2026
- Winter Storm, December 29, 2025
- Winter Weather, December 4, 2025
- Winter Storm, December 2, 2025
- Drought, December 1, 2025
- Drought, November 1, 2025
- Hail, September 6, 2025
- Drought, September 1, 2025
- Hail, July 20, 2025
- Thunderstorm Wind, June 24, 2025
- Hail, June 19, 2025
- Lightning, June 6, 2025
- Flash Flood, June 6, 2025
- Flood, May 31, 2025
- Lightning, May 17, 2025
- Winter Storm, March 29, 2025
- Winter Storm, February 15, 2025
- Winter Storm, February 8, 2025
- Winter Storm, January 19, 2025
- Hail, August 26, 2024
- Hail, August 15, 2024
- Tornado, July 16, 2024
- Hail, July 9, 2024
- Tornado, June 23, 2024
- Excessive Heat, June 19, 2024
- Winter Storm, April 3, 2024
- Winter Storm, March 23, 2024
- Winter Weather, January 14, 2024
- Winter Storm, January 6, 2024
- Flash Flood, July 29, 2023
- Flash Flood, July 15, 2023
- Flash Flood, July 8, 2023
- Flash Flood, July 3, 2023
- Flood, July 2, 2023
- Flash Flood, June 28, 2023
- Hail, June 2, 2023
- Frost/Freeze, May 18, 2023
- Winter Storm, March 13, 2023
- Winter Storm, March 3, 2023
- Extreme Cold/Wind Chill, February 3, 2023
- Winter Storm, January 22, 2023
- Winter Storm, January 19, 2023
- Flood, December 23, 2022
- Winter Storm, December 16, 2022
- Hail, July 21, 2022
- Hail, July 12, 2022
- Tornado, May 16, 2022
- Winter Weather, February 27, 2022
- Winter Storm, February 25, 2022
- Winter Storm, January 17, 2022
- Hail, September 15, 2021
- Flash Flood, July 29, 2021
- Hail, July 23, 2021
- Hail, July 20, 2021
- Hail, June 30, 2021
- Thunderstorm Wind, May 26, 2021
- Winter Storm, February 1, 2021
- Flood, December 25, 2020
- Winter Storm, December 17, 2020
- Drought, December 1, 2020
- Drought, November 1, 2020
- Drought, October 1, 2020
- Drought, September 1, 2020
- Thunderstorm Wind, August 25, 2020
- Hail, August 24, 2020
- Hail, August 23, 2020
- Tropical Storm, August 4, 2020
- Hail, July 23, 2020
- Thunderstorm Wind, July 13, 2020
- Hail, July 5, 2020
- Hail, June 6, 2020
- Thunderstorm Wind, May 15, 2020
- Winter Weather, May 8, 2020
- Winter Storm, March 23, 2020
- Winter Storm, December 29, 2019
- Flood, December 14, 2019
- Heavy Snow, December 1, 2019
- Hail, August 21, 2019
- Flood, April 27, 2019
- Heavy Snow, January 29, 2019
- Flood, January 24, 2019
- Heavy Snow, January 19, 2019
- Heavy Snow, November 20, 2018
- Heavy Snow, November 15, 2018
- Flood, November 13, 2018
- Flood, November 3, 2018
- Flash Flood, August 8, 2018
- Hail, August 3, 2018
- Hail, July 28, 2018
- Thunderstorm Wind, July 17, 2018
- Thunderstorm Wind, July 15, 2018
- Hail, July 10, 2018
- Tornado, June 18, 2018
- Thunderstorm Wind, May 4, 2018
- Tornado, May 4, 2018
- Flood, April 17, 2018
- Heavy Snow, March 13, 2018
- Heavy Snow, March 7, 2018
- Heavy Snow, February 17, 2018
- Heavy Snow, February 7, 2018
- Flood, January 12, 2018
- Blizzard, January 4, 2018
- Flood, November 1, 2017
- High Wind, October 30, 2017
- Flood, October 30, 2017
- Thunderstorm Wind, September 5, 2017
- Thunderstorm Wind, August 22, 2017
- Hail, August 2, 2017
- Thunderstorm Wind, June 19, 2017
- Hail, May 31, 2017
- Flood, April 6, 2017
- Heavy Snow, April 1, 2017
- Heavy Snow, March 31, 2017
- Heavy Snow, March 14, 2017
- Heavy Snow, February 12, 2017
- Heavy Snow, February 9, 2017
- Heavy Snow, January 17, 2017
- Heavy Snow, December 29, 2016
- Thunderstorm Wind, September 11, 2016
- Hail, July 23, 2016
- Flood, February 25, 2016
- Hail, August 25, 2015
- Flash Flood, August 18, 2015
- Hail, August 15, 2015
- Hail, August 4, 2015
- Hail, August 3, 2015
- Tornado, July 30, 2015
- Thunderstorm Wind, July 28, 2015
- Hail, July 19, 2015
- Flood, April 21, 2015
- Heavy Snow, February 14, 2015
- Heavy Snow, February 7, 2015
- Heavy Snow, February 2, 2015
- Blizzard, January 26, 2015
- Winter Storm, November 26, 2014
- Flash Flood, August 13, 2014
- Thunderstorm Wind, July 15, 2014
- Flash Flood, July 15, 2014
- Hail, July 3, 2014
- Hail, July 2, 2014
- Thunderstorm Wind, June 25, 2014
- Hail, May 25, 2014
- Flood, April 8, 2014
- Flood, April 5, 2014
- Flood, April 1, 2014
- Flood, March 31, 2014
- Heavy Snow, February 18, 2014
- Heavy Snow, February 13, 2014
- Heavy Snow, February 5, 2014
- Heavy Snow, January 2, 2014
- Heavy Snow, December 14, 2013
- High Wind, November 24, 2013
- Thunderstorm Wind, October 7, 2013
- Hail, September 11, 2013
- Flash Flood, September 2, 2013
- Flash Flood, September 2, 2013
- Thunderstorm Wind, July 19, 2013
- Flash Flood, June 30, 2013
- Hail, June 24, 2013
- Thunderstorm Wind, June 17, 2013
- Thunderstorm Wind, June 2, 2013
- Heavy Snow, March 19, 2013
- Heavy Snow, February 23, 2013
- Blizzard, February 8, 2013
- Winter Storm, December 26, 2012
- Debris Flow, October 29, 2012
- Thunderstorm Wind, September 8, 2012
- Thunderstorm Wind, August 17, 2012
- Thunderstorm Wind, August 5, 2012
- Tornado, July 17, 2012
- Thunderstorm Wind, July 4, 2012
- Hail, May 16, 2012
- Heavy Snow, March 1, 2012
- Flood, December 8, 2011
- Heavy Snow, October 29, 2011
- Hail, September 15, 2011
- Thunderstorm Wind, September 5, 2011
- Tropical Storm, August 28, 2011
- Flood, August 28, 2011
- Flood, August 28, 2011
- Hail, August 19, 2011
- Tornado, July 26, 2011
- Hail, June 18, 2011
- Flood, April 17, 2011
- Heavy Snow, April 1, 2011
- Flood, March 6, 2011
- Heavy Snow, February 25, 2011
- Heavy Snow, February 2, 2011
- Heavy Snow, January 18, 2011
- Heavy Snow, January 12, 2011
- Heavy Snow, December 26, 2010
- Hail, July 21, 2010
- Hail, July 19, 2010
- Hail, May 26, 2010
- Flood, April 1, 2010
- Flood, March 30, 2010
- Flood, March 23, 2010
- Flood, March 14, 2010
- High Wind, February 25, 2010
- Flood, February 25, 2010
- Flood, February 25, 2010
- Heavy Snow, February 23, 2010
- Heavy Snow, February 16, 2010
- Heavy Snow, January 17, 2010
- Flood, December 27, 2009
- Winter Storm, December 9, 2009
- Thunderstorm Wind, August 11, 2009
- Hail, July 4, 2009
- Flash Flood, June 29, 2009
- Hail, May 9, 2009
- Flood, April 6, 2009
- Flood, April 4, 2009
- Heavy Snow, March 1, 2009
- Heavy Snow, February 22, 2009
- Heavy Snow, February 18, 2009
- Winter Storm, January 28, 2009
- Heavy Snow, January 18, 2009
- Heavy Snow, January 10, 2009
- Heavy Snow, December 21, 2008
- Heavy Snow, December 19, 2008
- Ice Storm, December 11, 2008
- Flood, September 6, 2008
- Hail, August 16, 2008
- Flash Flood, August 10, 2008
- Hail, August 10, 2008
- Hail, July 31, 2008
- Hail, July 27, 2008
- Tornado, July 24, 2008
- Hail, July 18, 2008
- Hail, June 29, 2008
- Hail, June 27, 2008
- Hail, June 22, 2008
- Heavy Snow, March 1, 2008
- Heavy Snow, February 26, 2008
- Winter Storm, February 12, 2008
- Heavy Snow, January 14, 2008
- Heavy Snow, January 1, 2008
- Heavy Snow, December 30, 2007
- Heavy Snow, December 19, 2007
- Heavy Snow, December 16, 2007
- Heavy Snow, December 3, 2007
- Hail, August 30, 2007
- Hail, August 16, 2007
Earlier years, state by state:
More
Tornadoes in Merrimack CountyEvery warning in Merrimack County since 1986Every county in New Hampshire
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 2026-09-24.