Hail History

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Hail history for Lyman County, SD

Last hail in the countyJul 4, 20260.88 in (nickel)
Hail days, last 12 months3
Largest hail since 20068 inJul 23, 2010
Hail days since 200673
Days with hail 1 inch or larger64
Tornadoes in the county5
Damaging wind reports in the county250

144 hail reports in Lyman County since 2006 on 73 days. The largest stones measured 8 in on Jul 23, 2010.

Recent hail in Lyman County

DateHail sizeWhereSource
Jul 4, 20261.25 in
half dollar		Oacoma
3 hail reports		NWS storm report (preliminary)
Jun 3, 20261.75 in
golf ball		Iona, Presho
2 hail reports		NOAA Storm Events
Jun 2, 20261.75 in
golf ball		Lower Brule
1 hail report		NOAA Storm Events
Aug 13, 20251 in
quarter		Vivian
1 hail report		NOAA Storm Events
Aug 3, 20251.25 in
half dollar		Kennebec, Oacoma
2 hail reports		NOAA Storm Events
Jul 29, 20251 in
quarter		Reliance Airport
1 hail report		NOAA Storm Events
Jul 28, 20251.75 in
golf ball		Lower Brule
1 hail report		NOAA Storm Events
Jul 9, 20252.5 in
tennis ball		Lyman
1 hail report		NOAA Storm Events
Jun 27, 20251 in
quarter		Kennebec
1 hail report		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 Lyman County by year

4062077082097103114122131143154163177186193202132232324625326

When hail season peaks in Lyman County

JanFebMarApr13May16Jun18Jul21Aug5SepOctNovDec

Damaging thunderstorm winds in Lyman County

250 reports of damaging thunderstorm wind in Lyman County since 2006, on 118 days. The strongest measured gust was 104 mph on Jun 20, 2015.

DateStrongest gustWhereSource
Aug 18, 202660 mph, estimatedIona
1 wind report		NWS storm report (preliminary)
Aug 11, 202658 mph, measuredKennebec
1 wind report		NWS storm report (preliminary)
Jul 19, 202662 mph, measuredPresho, Kennebec
2 wind reports		NWS storm report (preliminary)
Jul 3, 202662 mph, measuredVivian, Kennebec
3 wind reports		NWS storm report (preliminary)
Jul 2, 202669 mph, measuredReliance, Joe Creek Rec Area
3 wind reports		NWS storm report (preliminary)
Jul 1, 202664 mph, measuredOacoma
1 wind report		NWS storm report (preliminary)
Jun 29, 202670 mph, measuredMc Clure, Vivian
2 wind reports		NOAA Storm Events
Jun 9, 202659 mph, measuredLower Brule
1 wind report		NOAA Storm Events
Jun 4, 202671 mph, measuredKennebec, Mc Clure, Vivian
5 wind reports		NOAA Storm Events
Jun 3, 202660 mph, estimatedIona
1 wind report		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 Lyman 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).