Hail history for Jasper County, IA

Jasper County has 220 recorded hail events in the NOAA Storm Events Database — 159 of them 1″ or larger and 25 at 2″ or larger. The largest on record: 4.5″ (grapefruit) on July 7, 2003.

Records 1950–present Data through April 2026 Peak month May

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 220 since 1972

1″ or larger 159 NWS severe threshold

2″ or larger 25 hen egg class and up

Largest recorded 4.5″ grapefruit · July 7, 2003

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 Jasper County

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

Most recent recorded events

Latest 8 of 220 recorded events · data through April 2026
Date	Size	Comparable to
April 17, 2025	0.75″	Penny
April 17, 2025	1.0″	Quarter
March 29, 2025	1.0″	Quarter
July 30, 2024	1.75″	Golf ball
July 30, 2024	1.0″	Quarter
July 30, 2024	1.0″	Quarter
July 30, 2024	1.75″	Golf ball
July 30, 2024	0.88″	Nickel

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

From the storm reports

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

April 17, 2025 · 1.0″ (quarter)

Report via social media.

May 7, 2023 · 2.75″ (baseball)

Delayed report, submitted via social media.

May 7, 2023 · 2.75″ (baseball)

Report received via social media.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
0	0	6	9	6	114	47	38

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 Jasper County

Has it ever hailed in Jasper County?

Yes — 220 hail events have been recorded for Jasper County, IA in the NOAA Storm Events Database since 1972, including 159 of 1″ (quarter size) or larger.

When did it last hail in Jasper County?

The most recent recorded hail event for Jasper County, IA is April 17, 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 Jasper County?

4.5″ (grapefruit), recorded on July 7, 2003. 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.