Hail history for Louisa County, IA

Louisa County has 67 recorded hail events in the NOAA Storm Events Database — 45 of them 1″ or larger and 5 at 2″ or larger. The largest on record: 2.75″ (baseball) on April 3, 2014.

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 67 since 1966

1″ or larger 45 NWS severe threshold

2″ or larger 5 hen egg class and up

Largest recorded 2.75″ baseball · April 3, 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 Louisa County

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

Most recent recorded events

Latest 8 of 67 recorded events · data through April 2026
Date	Size	Comparable to
March 31, 2026	1.5″	Ping-pong ball
March 31, 2026	1.0″	Quarter
March 31, 2026	1.75″	Golf ball
October 24, 2024	0.88″	Nickel
October 4, 2024	1.0″	Quarter
March 31, 2023	1.0″	Quarter
April 7, 2020	1.75″	Golf ball
April 7, 2020	1.5″	Ping-pong ball

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

From the storm reports

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

October 24, 2024 · 0.88″ (nickel)

A public report relayed a train spotter. The time of the event was estimated using radar.

March 15, 2016 · 2.5″ (tennis ball)

This report was delayed. The hail was reported up to the size of tennis balls. Numerous cars sustained dents and windows were broken out at a generation station.

April 3, 2014 · 2.75″ (baseball)

Local media relayed a public report of golf ball to baseball sized hail covering the ground.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
0	1	3	3	5	27	19	9

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 Louisa County

Has it ever hailed in Louisa County?

Yes — 67 hail events have been recorded for Louisa County, IA in the NOAA Storm Events Database since 1966, including 45 of 1″ (quarter size) or larger.

When did it last hail in Louisa County?

The most recent recorded hail event for Louisa County, IA is March 31, 2026, with 1.5″ (ping-pong 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 Louisa County?

2.75″ (baseball), recorded on April 3, 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.