Hail history for Lyon County, IA

Lyon County has 173 recorded hail events in the NOAA Storm Events Database — 111 of them 1″ or larger and 15 at 2″ or larger. The largest on record: 4.0″ (softball) on August 28, 2021.

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 173 since 1966

1″ or larger 111 NWS severe threshold

2″ or larger 15 hen egg class and up

Largest recorded 4.0″ softball · August 28, 2021

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 Lyon County

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

Most recent recorded events

Latest 8 of 173 recorded events · data through April 2026
Date	Size	Comparable to
June 2, 2025	1.0″	Quarter
June 2, 2025	1.25″	Half dollar
April 28, 2025	0.88″	Nickel
April 28, 2025	1.75″	Golf ball
April 28, 2025	2.0″	Hen egg
April 28, 2025	1.0″	Quarter
April 28, 2025	1.0″	Quarter
April 19, 2023	1.5″	Ping-pong ball

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

From the storm reports

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

June 2, 2025 · 1.25″ (half dollar)

Hail of various sizes fell, many with flat tops.

August 28, 2021 · 4.0″ (softball)

Multiple pictures received of very large hail around Larchwood. Hail size ranged from tennis ball to as much as 4 inches in diameter. Several cars and houses reported to have all windows broken out. Property damage costs are a rough estimate.

September 22, 2010 · 2.75″ (baseball)

Large hail dented vehicles and windshields;.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
0	2	1	4	12	87	45	22

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 Lyon County

Has it ever hailed in Lyon County?

Yes — 173 hail events have been recorded for Lyon County, IA in the NOAA Storm Events Database since 1966, including 111 of 1″ (quarter size) or larger.

When did it last hail in Lyon County?

The most recent recorded hail event for Lyon County, IA is June 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 Lyon County?

4.0″ (softball), recorded on August 28, 2021. 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 Iowa hail history

All 99 Iowa 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.