Hail history for Corson County, SD

Corson County has 310 recorded hail events in the NOAA Storm Events Database — 196 of them 1″ or larger and 22 at 2″ or larger. The largest on record: 3.0″ (tea cup) on July 8, 2009.

Records 1950–present Data through April 2026 Peak month June

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 310 since 1962

1″ or larger 196 NWS severe threshold

2″ or larger 22 hen egg class and up

Largest recorded 3.0″ tea cup · July 8, 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 Corson County

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

Most recent recorded events

Latest 8 of 310 recorded events · data through April 2026
Date	Size	Comparable to
September 12, 2025	1.0″	Quarter
September 12, 2025	1.75″	Golf ball
August 28, 2024	1.0″	Quarter
July 29, 2024	1.0″	Quarter
June 7, 2024	1.0″	Quarter
June 7, 2024	1.0″	Quarter
May 19, 2024	0.75″	Penny
May 19, 2024	1.25″	Half dollar

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

From the storm reports

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

August 6, 2019 · 1.75″ (golf ball)

Large hail and severe winds began a destructive path of crop and grassland damage from near Little Eagle and to the southeast before moving into eastern Dewey county.

September 10, 2009 · 2.75″ (baseball)

Baseball size hail along with strong winds caused quite a bit of tree and crop damage to the area.

August 17, 1995 · 2.75″ (baseball)

Large hail destroyed several acres of crops and high winds gusting to 80 mph downed several trees.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
0	7	2	11	35	141	96	18

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 Corson County

Has it ever hailed in Corson County?

Yes — 310 hail events have been recorded for Corson County, SD in the NOAA Storm Events Database since 1962, including 196 of 1″ (quarter size) or larger.

When did it last hail in Corson County?

The most recent recorded hail event for Corson County, SD is September 12, 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 Corson County?

3.0″ (tea cup), recorded on July 8, 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 South Dakota hail history

All 66 South Dakota 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.