Hail history for Cooper County, MO

Cooper County has 148 recorded hail events in the NOAA Storm Events Database — 75 of them 1″ or larger and 3 at 2″ or larger. The largest on record: 4.25″ (grapefruit) on June 17, 2009.

Records 1950–present Data through April 2026 Peak month April

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 148 since 1970

1″ or larger 75 NWS severe threshold

2″ or larger 3 hen egg class and up

Largest recorded 4.25″ grapefruit · June 17, 2009

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 Cooper County

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

Most recent recorded events

Latest 8 of 148 recorded events · data through April 2026
Date	Size	Comparable to
June 25, 2024	1.0″	Quarter
June 30, 2023	1.75″	Golf ball
March 31, 2023	1.0″	Quarter
March 31, 2023	1.25″	Half dollar
June 29, 2017	1.0″	Quarter
May 27, 2017	1.0″	Quarter
February 28, 2017	0.75″	Penny
April 3, 2014	0.75″	Penny

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

From the storm reports

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

June 25, 2024 · 1.0″ (quarter)

Quarter size hail was reported south of Boonville.

June 30, 2023 · 1.75″ (golf ball)

Golf ball sized hail was reported at Isle of Capri Casino in Boonville.

March 30, 1993 · 1.75″ (golf ball)

Golfball-size hail was reported by a weather spotter.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
0	0	5	24	23	69	23	4

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 Cooper County

Has it ever hailed in Cooper County?

Yes — 148 hail events have been recorded for Cooper County, MO in the NOAA Storm Events Database since 1970, including 75 of 1″ (quarter size) or larger.

When did it last hail in Cooper County?

The most recent recorded hail event for Cooper County, MO is June 25, 2024, 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 Cooper County?

4.25″ (grapefruit), recorded on June 17, 2009. Hail that size is destructive-class and typically damages roofs, vehicles, and siding. 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 Missouri hail history

All 115 Missouri 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.