Hail History

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Hail history for Merton, 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 200642
Days with hail 1 inch or larger29
Tornadoes within 10 miles5
Damaging wind reports within 10 miles106

Hail has been reported within 10 miles of Merton on 42 days since 2006. The largest stones measured 3 in (tea cup) on Jun 7, 2008. Hail is most common here in September and May.

Recent hail near Merton

DateHail sizeWhereSource
Jul 27, 20262 in
hen egg		Oconomowoc, Delafield
2 hail reports · closest 7 mi from Merton		NWS storm report (preliminary)
Apr 14, 20262 in
hen egg		Menomonee Falls, Merton, Monches
6 hail reports · closest near the center of Merton		NOAA Storm Events
May 15, 20252 in
hen egg		Alderley, Lapham Peak State Park, Nashotah
5 hail reports · closest 5 mi from Merton		NOAA Storm Events
Apr 18, 20251 in
quarter		Lac La Belle, Waukesha Co Airport
2 hail reports · closest 9 mi from Merton		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 Merton by year

606307208109310111312113114115164171819320221222223324225226

When hail season peaks near Merton

Of the 42 hail days since 2006, most fell in September (8) and May (7).

Jan1Feb2Mar6Apr7May7Jun7Jul4Aug8SepOctNovDec

Largest hail storms near Merton

Jun 7, 2008 · 3 in (tea cup) · Hartland (6 mi from Merton)

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

Apr 13, 2006 · 2 in (hen egg) · Sussex (5 mi from Merton)

National Weather Service description (English): Hail sized ranged from 1.00 to 2.00 inches in diameter.

May 11, 2011 · 2 in (hen egg) · Hartland (4 mi from Merton)

May 15, 2025 · 2 in (hen egg) · Alderley (9 mi from Merton)

Apr 14, 2026 · 2 in (hen egg) · Menomonee Falls (10 mi from Merton)

National Weather Service description (English): Trained spotter reports 2 inch diameter hail northeast of Menomonee Falls.

Tornadoes within 10 miles of Merton

DateRatingWherePath
Aug 18, 2026EF?Hubertus
6 mi from Merton
Apr 14, 2026EF2Merton
1 mi from Merton		3.8 mi long, 150 yd wide
Oct 12, 2022EF0Nashotah
5 mi from Merton		0.6 mi long, 50 yd wide
Jul 29, 2021EF0Lapham Peak State Park
8 mi from Merton		2.4 mi long, 50 yd wide
May 9, 2018EF0Holy Hill
5 mi from Merton		5.2 mi long, 50 yd wide

Damaging thunderstorm winds near Merton

106 reports of damaging thunderstorm wind within 10 miles of Merton since 2006, on 64 days. The strongest measured gust was 77 mph on Aug 10, 2021.

DateStrongest gustWhereSource
Sep 4, 2026damage reportedHubertus
1 wind report		NWS storm report (preliminary)
Sep 3, 2026damage reportedHubertus
1 wind report		NWS storm report (preliminary)
Aug 18, 2026damage reportedRichfield, Hubertus, Sussex
7 wind reports		NWS storm report (preliminary)
Jul 2, 202664 mph, measuredMenomonee Falls, Hartland, Pewaukee
3 wind reports		NWS storm report (preliminary)
Jun 10, 202660 mph, estimatedLannon
1 wind report		NOAA Storm Events
Apr 14, 202670 mph, estimatedHoly Hill, Meeker
2 wind reports		NOAA Storm Events
Sep 22, 202558 mph, estimatedDelafield
1 wind report		NOAA Storm Events
Aug 12, 202564 mph, estimatedDelafield
1 wind report		NOAA Storm Events
May 16, 202566 mph, measuredSummit Corners
1 wind report		NOAA Storm Events
Mar 15, 202567 mph, measuredSummit Corners, Oconomowoc
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 Merton; 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 Merton.

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