Mequon Hail — Storm History & NOAA Data for Mequon, WI

Data current as of 2026-10-16 · Sourced from NOAA Storm Events

Over the past five years, the National Oceanic and Atmospheric Administration has recorded 163 hail storms within 25 miles of Mequon, WI. Of those, 107 produced hail at least quarter-size — the threshold most insurance carriers consider potentially damaging to asphalt shingles. The largest reported hail in this window was egg-sized, which can fracture shingle mat and dent metal flashing on contact. 2024 was the most active year on record locally, with 41 documented hail events.

Check Hail History for a Specific Address in Mequon

Hail Severity Breakdown — Mequon Area (Last 5 Years)

Severity	Count	What it means for roofs
Destructive	7 events	Egg-size, expect mat fractures and gutter damage
Severe	15 events	Ping pong-size, granule loss and bruising common
Significant	85 events	Quarter-size, the standard insurance damage threshold
Moderate	56 events	Marble-size, possible cosmetic damage

Mequon Hail Storms by Year

Year	Reported Hail Events Within 25 mi
2026	40 events
2025	30 events
2024	41 events
2023	30 events
2022	22 events

2024 was the busiest hail year on record locally for Mequon, with 41 documented events inside the 25-mile radius. Storm activity in Mequon typically peaks in spring and early summer, when the jet stream pushes Gulf moisture into the area and supercell thunderstorms become more frequent.

Notable Recent Mequon Hail Storms

July 27, 2026 — Severe hail (ping pong ball-sized) reported near 1 ESE Lac La Belle. This storm met the quarter-size insurance damage threshold and is a candidate date when filing a claim for Mequon-area properties.
July 27, 2026 — Destructive hail (egg-sized) reported near 1 NE Oconomowoc. This storm met the quarter-size insurance damage threshold and is a candidate date when filing a claim for Mequon-area properties.
July 27, 2026 — Significant hail (quarter-sized or larger) reported near 1 S Delafield. This storm met the quarter-size insurance damage threshold and is a candidate date when filing a claim for Mequon-area properties.
July 3, 2026 — Significant hail (quarter-sized or larger) reported near 3 ESE Jackson. This storm met the quarter-size insurance damage threshold and is a candidate date when filing a claim for Mequon-area properties.
June 25, 2026 — Significant hail (quarter-sized or larger) reported near 4 E Iron Ridge. This storm met the quarter-size insurance damage threshold and is a candidate date when filing a claim for Mequon-area properties.

Recent Hail Events Near Mequon

Date	Location	Severity	Size	NOAA Comments
2026-08-10	1 W Hales Corners, WI	Moderate	0.75"	Report from mPING: Dime (0.75 in.).
2026-07-27	1 ESE Lac La Belle, WI	Severe	1.75"	—
2026-07-27	1 NE Oconomowoc, WI	Destructive	2.00"	—
2026-07-27	1 S Delafield, WI	Significant	1.00"	—
2026-07-03	3 ESE Jackson, WI	Significant	1.00"	Trained spotter reports 1 inch diameter hail in Jackson.
2026-06-25	4 E Iron Ridge, WI	Significant	1.00"	Delayed Report: Report from mPING: Quarter (1.00 in.).
2026-06-24	HERMAN CENTER, WI	Significant	1.00"	—
2026-04-21	Greenfield, WI	Significant	1.00"	Observation with pictures.
2026-04-21	GREENFIELD, WI	Significant	1.00"	Pictures provided.
2026-04-21	(MKE)MITCHELL APT MI, WI	Significant	1.00"	—
2026-04-21	2 WSW Saint Francis, WI	Significant	1.00"	Milwaukee Airport Observer pictures.
2026-04-21	(MKE)MITCHELL APT MI, WI	Significant	1.00"	Pictures provided by the weather observer at Mitchell Field.
2026-04-21	3 W Saint Francis, WI	Significant	1.00"	Report from mPING: Quarter (1.00 in.).
2026-04-16	Hales Corners, WI	Significant	1.00"	Mping report out of Hales Corners. Time estimated from radar.
2026-04-15	HALES CORNERS, WI	Significant	1.00"	Mping report of 1 inch diameter hail near Hales Corners.
2026-04-15	2 N Menomonee Falls, WI	Destructive	2.00"	Report from mPING: Hen Egg (2.00 in.).
2026-04-14	2 NNE Menomonee Falls, WI	Destructive	2.00"	Photo from social media with a tape measure.
2026-04-14	3 SSE Germantown, WI	Significant	1.25"	—
2026-04-14	Germantown, WI	Significant	1.00"	—
2026-04-14	1 E Butler, WI	Significant	1.00"	Report from mPING: Quarter (1.00 in.).

Wind Storm History — Mequon Area (Last 5 Years)

NOAA has recorded 97 high-wind events within 25 miles of Mequon, WI in the past five years. Of those, 95 reached severe-thunderstorm thresholds (58+ mph). The highest measured gust was 82 mph.

Severity	Count
Severe	22 events
Significant	73 events
Moderate	2 events

Recent Wind Events Near Mequon

Date	Location	Gust (mph)	Severity	NOAA Comments
2026-09-02	7 W Random Lake, WI	70	Severe	Report of significant barn damage. Photo relayed by WITI TV Milwaukee shows silo that was topped off and blew onto roof of barn. Time estimated by radar. Wet microburst environment and radar signature with very isolated damage.
2026-08-18	2 ENE Butler, WI	56	Significant	AWOS station KMWC Milwaukee Timmerman Airport reports 56 mph winds during thunderstorm.
2026-07-03	1 SE Menomonee Falls, WI	64	Severe	Private weather station measures 64 MPH wind gust. Time confirmed from radar.
2026-06-11	2 WSW Saint Francis, WI	53	Significant	Mitchell airport.
2026-06-11	2 NNW Saint Francis, WI	40	Moderate	Port of Milwaukee C-Man MLWW3.
2026-06-10	HARTFORD, WI	60	Significant	Public report of a downed tree near downtown Hartford. Wind gust estimated from radar data, nearby observations, and damage.
2026-06-10	LANNON, WI	60	Significant	Public report a small tree snapped half way up. Wind gust estimated from radar data and damage.
2026-04-27	KMKE Airport ASOS, WI	77	Severe	ASOS Peak Wind Report, 120-deg, 67-kt, 1832-zulu.
2026-04-27	2 WSW Saint Francis, WI	70	Severe	More than 200 calls for downed trees and branches in Milwaukee. Some trees blocking roads, and resting on homes and vehicles.
2026-04-27	2 ENE Shorewood, WI	43	Moderate	South southeast wind gust at 37 kt.
2026-04-27	1 ESE Port Washington, WI	52	Significant	Easterly wind gust at 45 kt.
2026-04-27	2 NNW Saint Francis, WI	51	Significant	Southeast wind gust to 44 kt.
2026-04-14	WEST ALLIS, WI	58	Significant	Multiple social media reports of trees and tree limbs down in southwest Milwaukee.
2026-04-14	BUTLER, WI	49	Significant	Multiple social media reports of tree limbs and trees down in northern and western Milwaukee.
2026-04-14	MILWAUKEE TIMMERMAN AIRPORT, WI	61	Significant	Timmerman Airport AWOS measured a 61 mph wind gust.
2026-04-14	3 E Neosho, WI	60	Significant	Trained spotter estimates 60 MPH winds with dozens of trees downed, uprooted, or snapped.
2026-04-14	HOLY HILL, WI	70	Severe	Many trees and some small building damage from Erin toward the Dodge County line.
2026-04-14	RUBICON, WI	75	Severe	Dozens of trees uprooted or snapped.
2026-04-14	MEEKER, WI	58	Significant	Trained spotter reports thunderstorm wind damage.
2026-04-14	2 E Butler, WI	61	Significant	Timmerman Airport AWOS.

Frequently Asked Questions About Mequon Hail

When was the last major hail storm in Mequon, WI?

The most recent quarter-size-or-larger hail storm recorded by NOAA within 25 miles of Mequon was on July 27, 2026. HailCheck refreshes from the NOAA Storm Events database daily, so newer events appear here as they are reported.

How often does it hail in Mequon?

Mequon averages roughly 33 reported hail events per year within a 25-mile radius. Significant storms (quarter-size or larger) account for 107 of the 163 events recorded over the last five years.

How big does hail typically get in Mequon?

The largest documented hail near Mequon in the last five years was egg-sized. Most Mequon-area hail falls in the marble-to-quarter range, with destructive storms (egg-size or larger) appearing roughly once every few years.

Does my insurance cover hail damage in WI?

Most homeowners insurance policies in WI cover hail damage to roofs, siding, and gutters under the dwelling and other-structures coverage. Coverage typically requires the damage to be tied to a verifiable storm date — which is where the NOAA hail history above (and a HAAG-style test square validation) becomes important for the claim file.

How do I check hail history for a specific Mequon address?

Use the HailCheck address search to enter any street address in or near Mequon. HailCheck returns every NOAA hail event within a configurable radius, along with severity bands, dates, and storm narratives for Pro members.

What a HAAG-Style Test Square Validation Means in Mequon

If your property in or near Mequon took on hail during one of the storms above, the standard process for documenting damage is a 10×10 foot test square inspection. A HAAG-trained reviewer counts impact indicators — granule displacement, mat fractures, and bruising — within the marked square and produces a PASS or FAIL document for the claim file.

HailCheck offers a $99 photo-based HAAG-style test square validation. You submit photos from the field, our reviewer evaluates the impact indicators and cross-references the NOAA storm dates listed above, and a written PASS/FAIL determination is returned within one business day. We do not send anyone to the roof — the validation is built around the photos you submit.

Learn About $99 HAAG-Style Validation

Why Mequon's Location Matters for Hail

Mequon sits east of the traditional hail alley, where hail events are less frequent than the central plains but tend to be associated with strong squall lines and tropical systems. Local roof systems are less commonly hardened for hail, which can mean even moderate impacts produce claim-worthy damage.