Greenfield Hail — Storm History & NOAA Data for Greenfield, 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 196 hail storms within 25 miles of Greenfield, WI. Of those, 136 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. 2026 was the most active year on record locally, with 55 documented hail events.

Check Hail History for a Specific Address in Greenfield

Hail Severity Breakdown — Greenfield Area (Last 5 Years)

Severity	Count	What it means for roofs
Destructive	9 events	Egg-size, expect mat fractures and gutter damage
Severe	15 events	Ping pong-size, granule loss and bruising common
Significant	112 events	Quarter-size, the standard insurance damage threshold
Moderate	60 events	Marble-size, possible cosmetic damage

Greenfield Hail Storms by Year

Year	Reported Hail Events Within 25 mi
2026	55 events
2025	50 events
2024	45 events
2023	28 events
2022	18 events

2026 was the busiest hail year on record locally for Greenfield, with 55 documented events inside the 25-mile radius. Storm activity in Greenfield 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 Greenfield Hail Storms

August 10, 2026 — Significant hail (quarter-sized or larger) reported near 1 SW Mukwonago. This storm met the quarter-size insurance damage threshold and is a candidate date when filing a claim for Greenfield-area properties.
August 10, 2026 — Significant hail (quarter-sized or larger) reported near 2 E Mukwonago. This storm met the quarter-size insurance damage threshold and is a candidate date when filing a claim for Greenfield-area properties.
July 27, 2026 — Significant hail (quarter-sized or larger) reported near Eagle Lake. This storm met the quarter-size insurance damage threshold and is a candidate date when filing a claim for Greenfield-area properties.
July 27, 2026 — Significant hail (quarter-sized or larger) reported near Waterford. This storm met the quarter-size insurance damage threshold and is a candidate date when filing a claim for Greenfield-area properties.
July 27, 2026 — Significant hail (quarter-sized or larger) reported near Browns Lake. This storm met the quarter-size insurance damage threshold and is a candidate date when filing a claim for Greenfield-area properties.

Recent Hail Events Near Greenfield

Date	Location	Severity	Size	NOAA Comments
2026-08-10	1 SW Mukwonago, WI	Significant	1.00"	—
2026-08-10	2 E Mukwonago, WI	Significant	1.25"	Report from mPING: Half Dollar (1.25 in.).
2026-08-10	1 W Hales Corners, WI	Moderate	0.75"	Report from mPING: Dime (0.75 in.).
2026-07-27	Eagle Lake, WI	Significant	1.00"	—
2026-07-27	Waterford, WI	Significant	1.00"	—
2026-07-27	Browns Lake, WI	Significant	1.00"	—
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.
2026-04-21	4 SE Wind Lake, WI	Significant	1.00"	Report from mPING: Quarter (1.00 in.).
2026-04-21	UNION GROVE HRNR ARP, WI	Significant	1.00"	—
2026-04-21	Greenfield, WI	Significant	1.00"	Observation with pictures.
2026-04-21	6 E Wind Lake, WI	Moderate	0.88"	—
2026-04-21	GREENFIELD, WI	Significant	1.00"	Pictures provided.
2026-04-21	NORTH CAPE, WI	Moderate	0.88"	—
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	2 SE Elmwood Park, WI	Significant	1.00"	Report from mPING: Quarter (1.00 in.).
2026-04-21	ELMWOOD PARK, WI	Significant	1.00"	—
2026-04-21	3 W Saint Francis, WI	Significant	1.00"	Report from mPING: Quarter (1.00 in.).

Wind Storm History — Greenfield Area (Last 5 Years)

NOAA has recorded 107 high-wind events within 25 miles of Greenfield, WI in the past five years. Of those, 105 reached severe-thunderstorm thresholds (58+ mph). The highest measured gust was 82 mph.

Severity	Count
Severe	23 events
Significant	82 events
Moderate	2 events

Recent Wind Events Near Greenfield

Date	Location	Gust (mph)	Severity	NOAA Comments
2026-08-18	2 ENE Butler, WI	56	Significant	AWOS station KMWC Milwaukee Timmerman Airport reports 56 mph winds during thunderstorm.
2026-07-27	2 SW North Prairie, WI	62	Significant	62 MPH wind gust measured via home weather station. Time confirmed from radar data.
2026-07-03	2 SSE Eagle Lake, WI	65	Severe	Private Weather Station.
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 WSW North Bay, WI	54	Significant	Racine airport.
2026-06-11	KENOSHA AIRPORT, WI	64	Severe	Storm chaser reports several large downed tree branches on 136th Avenue in the city of Kenosha. Wind gust estimated from radar data and damage.
2026-06-11	2 NNW Saint Francis, WI	40	Moderate	Port of Milwaukee C-Man MLWW3.
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	2 NW Burlington, WI	51	Significant	Burlington Municipal Airport.
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 WSW North Bay, WI	46	Significant	East to southeast wind gusts of 46 mph were reported at 1:35 PM CDT and 1:44 PM CDT at Batten Airport.
2026-04-27	2 ENE Shorewood, WI	43	Moderate	South southeast wind gust at 37 kt.
2026-04-27	17 E Saint Francis, WI	71	Severe	Mariner reports 62 kt wind gust measured from 84 ft mast. Location is approximate, exact time of ob is unknown (time is estimated from radar).
2026-04-27	2 NNW Saint Francis, WI	51	Significant	Southeast wind gust to 44 kt.
2026-04-17	EAST TROY, WI	64	Severe	An uprooted tree.
2026-04-17	CADDY VISTA, WI	81	Severe	Total destruction of a greenhouse and damage to other outbuildings. Multiple trees uprooted and leaning to the north northeast.
2026-04-14	ROCHESTER FOX RVR AR, WI	60	Significant	Trained spotter reports uprooted trees and shingle damage from thunderstorm winds.
2026-04-14	LAKE BEULAH, WI	64	Severe	Several large tree downs. Another tree down on County Highway L just to the south.

Frequently Asked Questions About Greenfield Hail

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

The most recent quarter-size-or-larger hail storm recorded by NOAA within 25 miles of Greenfield was on August 10, 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 Greenfield?

Greenfield averages roughly 39 reported hail events per year within a 25-mile radius. Significant storms (quarter-size or larger) account for 136 of the 196 events recorded over the last five years.

How big does hail typically get in Greenfield?

The largest documented hail near Greenfield in the last five years was egg-sized. Most Greenfield-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 Greenfield address?

Use the HailCheck address search to enter any street address in or near Greenfield. 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 Greenfield

If your property in or near Greenfield 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 Greenfield's Location Matters for Hail

Greenfield 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.