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Hail history for Grundy County, IL

Last hail in the countyJul 27, 20261.5 in (ping pong ball)

Hail days, last 12 months1

Largest hail since 20062.75 in (baseball)Jun 10, 2015

Hail days since 200627

Days with hail 1 inch or larger20

Tornadoes in the county15

Damaging wind reports in the county133

45 hail reports in Grundy County since 2006 on 27 days. The largest stones measured 2.75 in (baseball) on Jun 10, 2015.

Cities in Grundy County

Recent hail in Grundy County

Date	Hail size	Where	Source
Jul 27, 2026	1.5 in ping pong ball	Minooka, Carbon Hill 2 hail reports	NWS storm report (preliminary)

One row per day: the largest hail reported in the county that day, the places and the number of reports.

Hail days in Grundy County by year

When hail season peaks in Grundy County

Damaging thunderstorm winds in Grundy County

133 reports of damaging thunderstorm wind in Grundy County since 2006, on 60 days. The strongest measured gust was 81 mph on Jul 28, 2023.

Date	Strongest gust	Where	Source
Aug 12, 2026	65 mph, measured	Seneca, Verona, Coal City 4 wind reports	NWS storm report (preliminary)
Aug 11, 2026	70 mph, measured	Coal City, Mazon, Morris 5 wind reports	NWS storm report (preliminary)
Jun 10, 2026	75 mph, estimated	Willow Ridge, Wauponsee, Morris Municipal Airport 9 wind reports	NOAA Storm Events
May 4, 2026	59 mph, measured	Mazon 1 wind report	NOAA Storm Events
Jul 24, 2025	69 mph, estimated	Morris, Minooka 2 wind reports	NOAA Storm Events
May 15, 2025	79 mph, measured	Gardner, Dwight Airport, Braceville 4 wind reports	NOAA Storm Events
Jul 15, 2024	69 mph, estimated	Morris, Stockdale, Channahon 4 wind reports	NOAA Storm Events
Jun 25, 2024	60 mph, estimated	East Brooklyn 1 wind report	NOAA Storm Events
Jul 28, 2023	81 mph, measured	Channahon, Wauponsee 4 wind reports	NOAA Storm Events
Apr 20, 2023	61 mph, measured	Wauponsee, East Brooklyn, Mazon 4 wind reports	NOAA Storm Events

Severe thunderstorm wind means gusts of 58 mph or more, or wind that caused damage. Measured gusts come from weather stations; estimated ones from spotters and damage surveys.

Filing a roof or car hail claim?

Insurers ask for the date of loss. The dates on this page are when hail was reported near Grundy County; hail can hit one street and miss the next, so a report is not proof of damage at your address. A licensed roofer or your insurance adjuster can inspect the roof. Many policies set a time limit for filing a claim — check yours.

Data: NOAA NCEI Storm Events Database (final records through Jun 30, 2026) and National Weather Service Local Storm Reports (preliminary, since then).