Hail history for Merrimack County, NH

Merrimack County has 96 recorded hail events in the NOAA Storm Events Database — 58 of them 1″ or larger and 1 at 2″ or larger. The largest on record: 2.0″ (hen egg) on July 9, 2007.

Records 1950–present Data through April 2026 Peak month July

Core sample · every recorded event, 1955–2026

Mark size = measured hail diameter; slivers are events with no recorded size. Amber ≥2″, red ≥2.75″ (baseball class). Denser recent decades partly reflect better reporting, not only more storms.

Recorded events 96 since 1962

1″ or larger 58 NWS severe threshold

2″ or larger 1 hen egg class and up

Largest recorded 2.0″ hen egg · July 9, 2007

Read the record honestly: Storm Events contains what was reported to the National Weather Service. Sparse or rural counties under-report, and coverage improved sharply after the mid-1990s — a quiet-looking stretch is not proof nothing fell.

When it hails in Merrimack County

Recorded events by month, 1950–present. The amber bar marks Merrimack County's peak: July.

Most recent recorded events

Latest 8 of 96 recorded events · data through April 2026
Date	Size	Comparable to
September 6, 2025	1.0″	Quarter
July 20, 2025	1.5″	Ping-pong ball
June 19, 2025	1.25″	Half dollar
June 6, 2025	1.25″	Half dollar
June 6, 2025	1.25″	Half dollar
June 6, 2025	1.0″	Quarter
June 6, 2025	1.25″	Half dollar
June 6, 2025	1.25″	Half dollar

Looking for a specific storm? Use the did-it-hail date lookup for Merrimack County.

From the storm reports

Narratives as filed with the NOAA Storm Events Database (public records; lightly trimmed for length).

September 6, 2025 · 1.0″ (quarter)

A severe thunderstorm dropped hail the size of quarters in a food store parking lot north of Manchester.

July 10, 2018 · 1.75″ (golf ball)

A severe thunderstorm produced 1.75 inch hail at the Canterbury rest stop on Interstate 93. Cars were dented and some car windows broken. Hail accumulated to a few inches in depth.

July 9, 2007 · 2.0″ (hen egg)

A severe thunderstorm produced 2 inch hail in Concord.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
0	2	1	2	6	42	20	23

The climb across decades is largely a reporting story: spotter networks, radar, and digital filing pulled far more storms into the record after the 1990s.

Questions about hail in Merrimack County

Has it ever hailed in Merrimack County?

Yes — 96 hail events have been recorded for Merrimack County, NH in the NOAA Storm Events Database since 1962, including 58 of 1″ (quarter size) or larger.

When did it last hail in Merrimack County?

The most recent recorded hail event for Merrimack County, NH is September 6, 2025, with 1.0″ (quarter) hail. The database is currently updated through April 2026, so a storm from the last few weeks may not appear yet. To check a specific day, use the did-it-hail date lookup.

What is the largest hail ever recorded in Merrimack County?

2.0″ (hen egg), recorded on July 9, 2007. Hail that size meets or exceeds the National Weather Service severe threshold. See how big that really is on the actual-size hail chart.

Does a recorded hail event mean my roof was damaged?

No. This page reports storm records, not damage. Hail size and damage vary block by block within a county, and only an inspection can establish what happened to a specific roof. If you suspect damage, talk to your insurer or a licensed roofer — they can pull the same NOAA records for your claim.

More New Hampshire hail history

All 10 New Hampshire counties, ranked by recorded hail →

Source: NOAA/NCEI Storm Events Database, public domain, updated monthly by NCEI — this site's copy runs through April 2026. HailHistory reports records; it does not give insurance advice or assess damage.