Hail history for Washtenaw County, MI

Washtenaw County has 261 recorded hail events in the NOAA Storm Events Database — 129 of them 1″ or larger and 8 at 2″ or larger. The largest on record: 3.0″ (tea cup) on May 9, 2000.

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 261 since 1957

1″ or larger 129 NWS severe threshold

2″ or larger 8 hen egg class and up

Largest recorded 3.0″ tea cup · May 9, 2000

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 Washtenaw County

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

Most recent recorded events

Latest 8 of 261 recorded events · data through April 2026
Date	Size	Comparable to
March 6, 2026	0.88″	Nickel
August 16, 2025	1.0″	Quarter
May 19, 2024	0.88″	Nickel
February 28, 2024	1.0″	Quarter
July 20, 2023	2.0″	Hen egg
July 20, 2023	1.0″	Quarter
July 20, 2023	1.5″	Ping-pong ball
July 14, 2023	1.25″	Half dollar

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

From the storm reports

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

July 29, 2001 · 0.75″ (penny)

Several vehicles damaged by hail at state police post.

May 15, 2001 · 0.75″ (penny)

Thunderstorms developed just north of a warm front that was moving northeast into far southern Michigan. One storm in Washtenaw County briefly reached severe levels. The most notable part of the storms was the heavy rain, with estimates of 5 to 7 inches of rain in a few hours in parts of Washtenaw, Lenawee, and Monroe Counties. The heavy rain produced a lot of nuisance standing water, but no flash flooding.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
2	5	4	17	26	101	79	27

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 Washtenaw County

Has it ever hailed in Washtenaw County?

Yes — 261 hail events have been recorded for Washtenaw County, MI in the NOAA Storm Events Database since 1957, including 129 of 1″ (quarter size) or larger.

When did it last hail in Washtenaw County?

The most recent recorded hail event for Washtenaw County, MI is March 6, 2026, with 0.88″ (nickel) 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 Washtenaw County?

3.0″ (tea cup), recorded on May 9, 2000. 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 Michigan hail history

All 83 Michigan 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.