Hail history for Warren County, IA

Warren County has 338 recorded hail events in the NOAA Storm Events Database — 214 of them 1″ or larger and 17 at 2″ or larger. The largest on record: 3.5″ (softball) on June 30, 2014.

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 338 since 1962

1″ or larger 214 NWS severe threshold

2″ or larger 17 hen egg class and up

Largest recorded 3.5″ softball · June 30, 2014

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 Warren County

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

Most recent recorded events

Latest 8 of 338 recorded events · data through April 2026
Date	Size	Comparable to
September 16, 2025	0.75″	Penny
May 19, 2025	0.88″	Nickel
April 17, 2025	1.0″	Quarter
April 17, 2025	1.0″	Quarter
April 17, 2025	0.75″	Penny
October 24, 2024	1.0″	Quarter
October 24, 2024	0.75″	Penny
October 4, 2024	1.0″	Quarter

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

From the storm reports

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

September 16, 2025 · 0.75″ (penny)

Delayed report from mping.

May 14, 2020 · 3.0″ (tea cup)

Emergency management relayed report of 3 inch hail.

May 14, 2020 · 2.75″ (baseball)

Media relayed image of baseball sized hail. Delayed report via social media. Time estimate via radar.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
0	4	12	20	35	112	83	72

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 Warren County

Has it ever hailed in Warren County?

Yes — 338 hail events have been recorded for Warren County, IA in the NOAA Storm Events Database since 1962, including 214 of 1″ (quarter size) or larger.

When did it last hail in Warren County?

The most recent recorded hail event for Warren County, IA is September 16, 2025, with 0.75″ (penny) 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 Warren County?

3.5″ (softball), recorded on June 30, 2014. 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.