Hail history for Gregory County, SD

Gregory County has 246 recorded hail events in the NOAA Storm Events Database — 153 of them 1″ or larger and 21 at 2″ or larger. The largest on record: 3.0″ (tea cup) on July 12, 1965.

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 246 since 1957

1″ or larger 153 NWS severe threshold

2″ or larger 21 hen egg class and up

Largest recorded 3.0″ tea cup · July 12, 1965

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 Gregory County

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

Most recent recorded events

Latest 8 of 246 recorded events · data through April 2026
Date	Size	Comparable to
August 3, 2025	1.0″	Quarter
July 28, 2025	1.75″	Golf ball
July 15, 2025	1.25″	Half dollar
June 28, 2025	1.0″	Quarter
June 28, 2025	0.88″	Nickel
June 19, 2025	1.0″	Quarter
August 25, 2024	1.0″	Quarter
August 25, 2024	1.0″	Quarter

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

From the storm reports

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

July 28, 2025 · 1.75″ (golf ball)

Hail occurred for 15 minutes, as size varied from quarters to golf balls. Most hail was quarter to half-dollar size.

August 25, 2024 · 2.75″ (baseball)

Considerable quarter to golf ball size hail fell, with a few stones up to baseball size.

July 28, 2024 · 2.75″ (baseball)

Hail ranged from golf ball to baseball size. Multiple windshields were broken with large dents in vehicles and corn was stripped of most of its leaves.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
2	2	2	8	39	116	42	35

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 Gregory County

Has it ever hailed in Gregory County?

Yes — 246 hail events have been recorded for Gregory County, SD in the NOAA Storm Events Database since 1957, including 153 of 1″ (quarter size) or larger.

When did it last hail in Gregory County?

The most recent recorded hail event for Gregory County, SD is August 3, 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 Gregory County?

3.0″ (tea cup), recorded on July 12, 1965. 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.