Hail History

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Hail history for Oconomowoc, WI

Last hail within 10 milesJul 27, 20261 in (quarter)
Hail days, last 12 months2
Largest hail since 20063 in (tea cup)Jun 7, 2008
Hail days since 200636
Days with hail 1 inch or larger23
Tornadoes within 10 miles8
Damaging wind reports within 10 miles90

Hail has been reported within 10 miles of Oconomowoc on 36 days since 2006. The largest stones measured 3 in (tea cup) on Jun 7, 2008. Hail is most common here in June and May.

Recent hail near Oconomowoc

DateHail sizeWhereSource
Jul 27, 20262.5 in
tennis ball		Oconomowoc, Lac La Belle, Delafield
5 hail reports · closest near the center of Oconomowoc		NWS storm report (preliminary)
Apr 14, 20261.5 in
ping pong ball		Merton, Oconomowoc Lake, Hartland
3 hail reports · closest 2 mi from Oconomowoc		NOAA Storm Events
May 15, 20252.5 in
tennis ball		Ixonia, Ashippun, Alderley
9 hail reports · closest 2 mi from Oconomowoc		NOAA Storm Events
Apr 18, 20251 in
quarter		Lac La Belle
1 hail report · closest 3 mi from Oconomowoc		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 Oconomowoc by year

40630720809210211312113114151631711819120121322223324225226

When hail season peaks near Oconomowoc

Of the 36 hail days since 2006, most fell in June (8) and May (8).

Jan2Feb2Mar4Apr8May8Jun5Jul2Aug5SepOctNovDec

Largest hail storms near Oconomowoc

Jun 7, 2008 · 3 in (tea cup) · Hartland (7 mi from Oconomowoc)

National Weather Service description (English): Hail size ranged from 0.75 to 3.00 inches in diameter.

May 15, 2025 · 2.5 in (tennis ball) · Ixonia (5 mi from Oconomowoc)

National Weather Service description (English): Hail sizes ranging from 0.5 inch to larger than 2 inches in diameter and lasted about 20 minutes. Wind was generally from the west and south with strong gusts. Damage to vinyl siding and windows.

Jul 27, 2026 · 2.5 in (tennis ball) · Oconomowoc (1 mi from Oconomowoc)

Apr 13, 2006 · 2 in (hen egg) · Concord (6 mi from Oconomowoc)

May 11, 2011 · 2 in (hen egg) · Hartland (8 mi from Oconomowoc)

Tornadoes within 10 miles of Oconomowoc

DateRatingWherePath
Oct 12, 2022EF0Nashotah
6 mi from Oconomowoc		0.6 mi long, 50 yd wide
Jul 29, 2021EF1Pipersville
9 mi from Oconomowoc		7.7 mi long, 200 yd wide
Jul 29, 2021EF1Sullivan
7 mi from Oconomowoc		1.9 mi long, 150 yd wide
Jul 29, 2021EF1Utica
7 mi from Oconomowoc		2.7 mi long, 150 yd wide
Jul 29, 2021EF1Utica
5 mi from Oconomowoc		1.0 mi long, 75 yd wide
Jul 29, 2021EF0Lapham Peak State Park
10 mi from Oconomowoc		2.4 mi long, 50 yd wide
Oct 1, 2019EF1Utica
9 mi from Oconomowoc		8.5 mi long, 100 yd wide
Jul 22, 2010EF0Farmington
8 mi from Oconomowoc		0.1 mi long, 30 yd wide

Damaging thunderstorm winds near Oconomowoc

90 reports of damaging thunderstorm wind within 10 miles of Oconomowoc since 2006, on 57 days. The strongest measured gust was 77 mph on Aug 10, 2021.

DateStrongest gustWhereSource
Jul 2, 2026damage reportedHartland
1 wind report		NWS storm report (preliminary)
Apr 14, 202681 mph, estimatedOconomowoc Lake
1 wind report		NOAA Storm Events
Sep 22, 202558 mph, estimatedIxonia, Delafield
2 wind reports		NOAA Storm Events
Aug 12, 202564 mph, estimatedDelafield, Sullivan
2 wind reports		NOAA Storm Events
May 16, 202566 mph, measuredSummit Corners, Oconomowoc Lake
2 wind reports		NOAA Storm Events
Mar 15, 202567 mph, measuredSummit Corners, Concord, Oconomowoc
3 wind reports		NOAA Storm Events
Aug 27, 202458 mph, estimatedOconomowoc, Delafield
2 wind reports		NOAA Storm Events
Jun 17, 202470 mph, estimatedSummit Corners
1 wind report		NOAA Storm Events
May 21, 202464 mph, estimatedWales
2 wind reports		NOAA Storm Events
May 7, 202458 mph, estimatedOconomowoc, Hartland
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 Oconomowoc; 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 Oconomowoc.

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