Hail History

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Hail history for Delavan Lake, WI

Last hail within 10 milesAug 9, 20261 in (quarter)
Hail days, last 12 months2
Largest hail since 20062.5 in (tennis ball)May 2, 2018
Hail days since 200622
Days with hail 1 inch or larger14
Tornadoes within 10 miles21
Damaging wind reports within 10 miles81

Hail has been reported within 10 miles of Delavan Lake on 22 days since 2006. The largest stones measured 2.5 in (tennis ball) on May 2, 2018. Hail is most common here in June and May.

Recent hail near Delavan Lake

DateHail sizeWhereSource
Aug 9, 20261.25 in
half dollar		Lake Geneva, Fontana-on-Geneva
3 hail reports · closest 7 mi from Delavan Lake		NWS storm report (preliminary)
Apr 15, 20261 in
quarter		Big Foot, Elkhorn Airport
2 hail reports · closest 8 mi from Delavan Lake		NOAA Storm Events

One row per day: the largest hail reported that day within 10 miles, the places and the number of reports.

Hail days near Delavan Lake by year

206107408091101111221311415116117118219120121122232425226

When hail season peaks near Delavan Lake

Of the 22 hail days since 2006, most fell in June (5) and May (4).

1JanFebMar2Apr4May5Jun3Jul4Aug3SepOctNovDec

Largest hail storms near Delavan Lake

May 2, 2018 · 2.5 in (tennis ball) · Williams Bay (4 mi from Delavan Lake)

National Weather Service description (English): Wind driven ping pong size hail broke a window on the 90 foot dome of the Yerkes Observatory.

Aug 30, 2013 · 1.5 in (ping pong ball) · Delavan (3 mi from Delavan Lake)

May 12, 2014 · 1.5 in (ping pong ball) · Elkhorn (8 mi from Delavan Lake)

Sep 7, 2021 · 1.5 in (ping pong ball) · Delavan (4 mi from Delavan Lake)

Aug 9, 2026 · 1.25 in (half dollar) · Lake Geneva (9 mi from Delavan Lake)

Tornadoes within 10 miles of Delavan Lake

DateRatingWherePath
Apr 17, 2026EF1Richmond
10 mi from Delavan Lake		1.1 mi long, 75 yd wide
Apr 17, 2026EF1Darien
6 mi from Delavan Lake		2.8 mi long, 75 yd wide
Apr 17, 2026EF1Delavan
5 mi from Delavan Lake		2.7 mi long, 75 yd wide
Apr 15, 2026EF1Delavan Lake
7 mi from Delavan Lake		2.8 mi long, 75 yd wide
Jun 22, 2024EF1Delavan Airport
3 mi from Delavan Lake		6.0 mi long, 150 yd wide
Jun 22, 2024EF1Linton
6 mi from Delavan Lake		5.3 mi long, 100 yd wide
May 7, 2024EF0Chemung
9 mi from Delavan Lake		3.8 mi long, 50 yd wide
May 7, 2024EF0Walworth Big Foot Airport
6 mi from Delavan Lake		5.2 mi long, 50 yd wide
May 7, 2024EF1Darien
5 mi from Delavan Lake		1.0 mi long, 50 yd wide
Jun 1, 2023EF?Walworth Big Foot Airport
4 mi from Delavan Lake		0.0 mi long, 10 yd wide
Mar 31, 2023EF1Sharon
8 mi from Delavan Lake		3.8 mi long, 300 yd wide
Mar 31, 2023EF0Sharon
7 mi from Delavan Lake		10.6 mi long, 100 yd wide

Damaging thunderstorm winds near Delavan Lake

81 reports of damaging thunderstorm wind within 10 miles of Delavan Lake since 2006, on 55 days. The strongest measured gust was 74 mph on Aug 9, 2009.

DateStrongest gustWhereSource
Jul 3, 2026100 mph, estimatedDarien, Sharon, Delavan Lake
5 wind reports		NWS storm report (preliminary)
Jun 11, 202658 mph, estimatedFontana
1 wind report		NOAA Storm Events
Apr 2, 202658 mph, estimatedElkhorn
1 wind report		NOAA Storm Events
Jun 3, 202560 mph, estimatedWalworth Big Foot Airport
1 wind report		NOAA Storm Events
Mar 15, 202562 mph, measuredWalworth Big Foot Airport
1 wind report		NOAA Storm Events
Mar 14, 202563 mph, measuredWalworth Big Foot Airport
1 wind report		NOAA Storm Events
May 22, 202458 mph, estimatedElkhorn Airport
1 wind report		NOAA Storm Events
May 21, 202458 mph, estimatedWanoawega
1 wind report		NOAA Storm Events
May 7, 202458 mph, estimatedFairfield, Walworth, Delavan
5 wind reports		NOAA Storm Events
Mar 4, 202460 mph, estimatedDarien
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 Delavan Lake; 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.

Nearby cities

Data: NOAA NCEI Storm Events Database (final records through Jun 30, 2026) and National Weather Service Local Storm Reports (preliminary, since then). Distances are measured from the center of Delavan Lake.

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