Hail History

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Hail history for Grant County, SD

Last hail in the countyJul 6, 20260.75 in (penny)
Hail days, last 12 months1
Largest hail since 20062.75 in (baseball)Aug 28, 2021
Hail days since 200635
Days with hail 1 inch or larger29
Tornadoes in the county6
Damaging wind reports in the county48

84 hail reports in Grant County since 2006 on 35 days. The largest stones measured 2.75 in (baseball) on Aug 28, 2021.

Cities in Grant County

Recent hail in Grant County

DateHail sizeWhereSource
Jul 6, 20260.75 in
penny		Twin Brooks
1 hail report		NWS storm report (preliminary)
Aug 21, 20251 in
quarter		Big Stone City, Milbank
3 hail reports		NOAA Storm Events

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

Hail days in Grant County by year

606307108091102112121133145151621711811922012112223124125126

When hail season peaks in Grant County

JanFebMar1Apr4May12Jun7Jul6Aug3Sep2OctNovDec

Damaging thunderstorm winds in Grant County

48 reports of damaging thunderstorm wind in Grant County since 2006, on 34 days. The strongest measured gust was 115 mph on Jul 31, 2008.

DateStrongest gustWhereSource
Jul 20, 202662 mph, measuredMilbank, Big Stone City
2 wind reports		NWS storm report (preliminary)
Jul 4, 202665 mph, measuredBig Stone City
2 wind reports		NWS storm report (preliminary)
Jun 15, 202660 mph, measuredBig Stone City
1 wind report		NOAA Storm Events
Jul 28, 202560 mph, measuredBig Stone City
1 wind report		NOAA Storm Events
May 15, 202558 mph, measuredBig Stone City
1 wind report		NOAA Storm Events
Aug 6, 202266 mph, measuredBig Stone City
1 wind report		NOAA Storm Events
Jun 20, 202290 mph, estimatedMilbank
1 wind report		NOAA Storm Events
May 30, 202270 mph, measuredLabolt, Big Stone City
2 wind reports		NOAA Storm Events
May 12, 202285 mph, estimatedHiland, Big Stone City
2 wind reports		NOAA Storm Events
Aug 28, 202170 mph, measuredBig Stone City, Hiland
2 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 Grant 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).