Hail history for Hamlin County, SD

Hamlin County has 192 recorded hail events in the NOAA Storm Events Database — 99 of them 1″ or larger and 5 at 2″ or larger. The largest on record: 2.75″ (baseball) on July 17, 2010.

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 192 since 1964

1″ or larger 99 NWS severe threshold

2″ or larger 5 hen egg class and up

Largest recorded 2.75″ baseball · July 17, 2010

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 Hamlin County

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

Most recent recorded events

Latest 8 of 192 recorded events · data through April 2026
Date	Size	Comparable to
September 2, 2025	1.0″	Quarter
July 27, 2025	1.0″	Quarter
July 27, 2025	1.75″	Golf ball
July 27, 2025	1.75″	Golf ball
July 7, 2025	1.0″	Quarter
June 28, 2025	1.0″	Quarter
June 28, 2025	1.0″	Quarter
June 28, 2025	1.0″	Quarter

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

From the storm reports

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

July 7, 2025 · 1.0″ (quarter)

A COOP observer reported one-inch hail as a storm moved over Hayti.

July 17, 2010 · 2.75″ (baseball)

A supercell thunderstorm entered western Hamlin county and tracked southeast producing quarter to baseball size hail along with damaging winds in excess of 70 mph. The large hail and strong winds caused extensive damage to homes, outbuildings, vehicles, and especially crops. Thousands of acres of corn, soybeans, and wheat were damaged or destroyed across Hamlin county.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
0	2	1	14	25	63	68	19

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 Hamlin County

Has it ever hailed in Hamlin County?

Yes — 192 hail events have been recorded for Hamlin County, SD in the NOAA Storm Events Database since 1964, including 99 of 1″ (quarter size) or larger.

When did it last hail in Hamlin County?

The most recent recorded hail event for Hamlin County, SD is September 2, 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 Hamlin County?

2.75″ (baseball), recorded on July 17, 2010. 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.