Hail history for Warren County, MO

Warren County has 110 recorded hail events in the NOAA Storm Events Database — 76 of them 1″ or larger and 6 at 2″ or larger. The largest on record: 4.5″ (grapefruit) on April 22, 2011.

Records 1950–present Data through April 2026 Peak month April

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 110 since 1967

1″ or larger 76 NWS severe threshold

2″ or larger 6 hen egg class and up

Largest recorded 4.5″ grapefruit · April 22, 2011

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: April.

Most recent recorded events

Latest 8 of 110 recorded events · data through April 2026
Date	Size	Comparable to
April 27, 2026	1.0″	Quarter
April 27, 2026	1.0″	Quarter
April 27, 2026	1.0″	Quarter
May 16, 2025	1.75″	Golf ball
May 16, 2025	1.75″	Golf ball
May 16, 2025	1.75″	Golf ball
May 16, 2025	1.0″	Quarter
May 26, 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).

May 16, 2025 · 1.75″ (golf ball)

The Warren County emergency manager reported golf ball sized hail at Marthasville.

March 14, 2024 · 3.0″ (tea cup)

Widespread large hail up to three inches in diameter fell across the southern half of Warren County, including the following towns: Pendelton, Warrenton, Truesdale, Innsbrook and Wright City.

April 22, 2011 · 4.5″ (grapefruit)

A swath of large hail fell over the Warrenton area. The biggest hail stones were softball size.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
0	1	1	8	16	26	43	15

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 — 110 hail events have been recorded for Warren County, MO in the NOAA Storm Events Database since 1967, including 76 of 1″ (quarter size) or larger.

When did it last hail in Warren County?

The most recent recorded hail event for Warren County, MO is April 27, 2026, 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 Warren County?

4.5″ (grapefruit), recorded on April 22, 2011. 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 Missouri hail history

All 115 Missouri 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.