Hail history for Yankton County, SD

Yankton County has 252 recorded hail events in the NOAA Storm Events Database — 144 of them 1″ or larger and 12 at 2″ or larger. The largest on record: 2.75″ (baseball) on June 29, 2017.

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 252 since 1956

1″ or larger 144 NWS severe threshold

2″ or larger 12 hen egg class and up

Largest recorded 2.75″ baseball · June 29, 2017

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 Yankton County

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

Most recent recorded events

Latest 8 of 252 recorded events · data through April 2026
Date	Size	Comparable to
July 7, 2025	1.75″	Golf ball
June 29, 2025	1.0″	Quarter
June 27, 2025	1.0″	Quarter
June 27, 2025	0.75″	Penny
June 16, 2025	1.0″	Quarter
June 16, 2025	0.75″	Penny
June 16, 2025	1.0″	Quarter
June 16, 2025	0.88″	Nickel

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

From the storm reports

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

June 29, 2025 · 1.0″ (quarter)

Quarter-size hail damaged crops.

June 29, 2017 · 2.75″ (baseball)

Report received through social media.

June 16, 2006 · 2.75″ (baseball)

Large hail broke windows and severely damaged siding on at least two homes. The hail also severely damaged corn and soybean crops. The amount of crop damage could not be determined because the extent of crop recovery could not be known for a long time. However, some crops were severely enough damaged to require replanting.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
1	2	8	12	26	131	43	29

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 Yankton County

Has it ever hailed in Yankton County?

Yes — 252 hail events have been recorded for Yankton County, SD in the NOAA Storm Events Database since 1956, including 144 of 1″ (quarter size) or larger.

When did it last hail in Yankton County?

The most recent recorded hail event for Yankton County, SD is July 7, 2025, with 1.75″ (golf ball) 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 Yankton County?

2.75″ (baseball), recorded on June 29, 2017. 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.