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 85 hail storms within 25 miles of Oshkosh, WI. Of those, 47 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 baseball-sized or larger, which can fracture shingle mat and dent metal flashing on contact. 2026 was the most active year on record locally, with 58 documented hail events.
Check Hail History for a Specific Address in Oshkosh| Severity | Count | What it means for roofs |
|---|---|---|
| Catastrophic | 1 event | Baseball+ size, structural roof damage likely |
| Destructive | 5 events | Egg-size, expect mat fractures and gutter damage |
| Severe | 10 events | Ping pong-size, granule loss and bruising common |
| Significant | 31 events | Quarter-size, the standard insurance damage threshold |
| Moderate | 35 events | Marble-size, possible cosmetic damage |
| Minor | 3 events | Pea-size, unlikely to damage modern shingles |
| Year | Reported Hail Events Within 25 mi |
|---|---|
| 2026 | 58 events |
| 2025 | 5 events |
| 2024 | 3 events |
| 2023 | 5 events |
| 2022 | 14 events |
2026 was the busiest hail year on record locally for Oshkosh, with 58 documented events inside the 25-mile radius. Storm activity in Oshkosh typically peaks in spring and early summer, when the jet stream pushes Gulf moisture into the area and supercell thunderstorms become more frequent.
| Date | Location | Severity | Size | NOAA Comments |
|---|---|---|---|---|
| 2026-08-18 | 1 NE Fond Du Lac, WI | Significant | 1.00" | Delayed Storm Report. Quarter sized hail. |
| 2026-08-18 | 1 SSE Fond Du Lac, WI | Significant | 1.00" | Spotter report of quarter sized hail in Fond du Lac. |
| 2026-07-27 | 1 NE Darboy, WI | Significant | 1.00" | Report from former NWS meteorologist. |
| 2026-07-08 | 4 NE Fremont, WI | Minor | 0.25" | — |
| 2026-07-01 | 4 S Rosendale, WI | Significant | 1.25" | Report from mPING: Half Dollar (1.25 in.). |
| 2026-07-01 | 4 S Rosendale, WI | Significant | 1.00" | Report from mPING: Quarter (1.00 in.). |
| 2026-07-01 | 3 E Lamartine, WI | Significant | 1.00" | Report from mPING: Quarter (1.00 in.). |
| 2026-07-01 | 4 S Rosendale, WI | Destructive | 2.50" | Size est from social media pics sent to local media shared by County EM. Time est from radar. |
| 2026-07-01 | Brandon, WI | Severe | 1.50" | Size est from social media pics sent to local media shared by County EM. Time est from radar. |
| 2026-07-01 | 2 ENE Lamartine, WI | Destructive | 2.00" | From social media picture. Time est from radar. |
| 2026-07-01 | 3 SE Fond Du Lac, WI | Severe | 1.50" | — |
| 2026-07-01 | 2 S Fond Du Lac, WI | Significant | 1.00" | Report from mPING: Quarter (1.00 in.). |
| 2026-07-01 | 4 S Fond Du Lac, WI | Catastrophic | 3.25" | Approx 1 mile SSW of the intersection of I-41 and US HWY 151. |
| 2026-07-01 | 4 W Eden, WI | Significant | 1.25" | Report from mPING: Half Dollar (1.25 in.). |
| 2026-07-01 | 3 E Fond Du Lac, WI | Severe | 1.50" | Report from mPING: Ping Pong Ball (1.50 in.). |
| 2026-07-01 | 4 W Eden, WI | Significant | 1.00" | Report from mPING: Quarter (1.00 in.). |
| 2026-07-01 | 3 SSW Fond Du Lac, WI | Severe | 1.75" | Corner of Rolling Meadows and Hickory. |
| 2026-07-01 | 2 SSW Fond Du Lac, WI | Destructive | 2.00" | Picture shared by local media. Time est from radar. |
| 2026-07-01 | 4 NNW Eden, WI | Severe | 1.50" | 4 miles ESE of Fond du Lac. Time est from radar. |
| 2026-07-01 | 3 SE Fond Du Lac, WI | Severe | 1.75" | Size est from social media pics sent to local media shared by County EM. Time est from radar. |
NOAA has recorded 91 high-wind events within 25 miles of Oshkosh, WI in the past five years. Of those, 85 reached severe-thunderstorm thresholds (58+ mph). The highest measured gust was 94 mph.
| Severity | Count |
|---|---|
| Severe | 30 events |
| Significant | 55 events |
| Moderate | 6 events |
| Date | Location | Gust (mph) | Severity | NOAA Comments |
|---|---|---|---|---|
| 2026-09-04 | Wittman Field, WI | 46 | Significant | — |
| 2026-09-04 | 1 NE Fond Du Lac, WI | 58 | Significant | Personal Wx Station measurement. |
| 2026-09-04 | 2 WSW Fond Du Lac, WI | 52 | Significant | REPORTED AT KFLD. |
| 2026-09-04 | Omro, WI | 50 | Significant | — |
| 2026-09-02 | 1 SW Ripon, WI | 68 | Severe | Personal Wx Station Report. |
| 2026-09-02 | Oshkosh, WI | 56 | Significant | Measured at Wittman Regional Airport. |
| 2026-09-02 | 2 S Greenville, WI | 59 | Significant | Measured at Appleton International Airport. |
| 2026-07-02 | Wittman Field, WI | 45 | Moderate | Measured at KOSH. |
| 2026-07-01 | Wittman Field, WI | 61 | Significant | — |
| 2026-07-01 | 2 SW Fond Du Lac, WI | 43 | Moderate | ASOS station KFLD Fond Du Lac Airport. |
| 2026-06-10 | 1 S Wittman Field, WI | 94 | Severe | ASOS station KOSH Oshkosh Airport. |
| 2026-06-10 | (OSH)WITTMAN FLD OSH, WI | 70 | Severe | Thunderstorm winds produced significant damage to farm buildings and uprooted a large pine tree south of Oshkosh. The time of this report is an estimate based on radar data. |
| 2026-06-10 | (OSH)WITTMAN FLD OSH, WI | 70 | Severe | Thunderstorms produced a wind gust to around 70 mph at the Oshkosh Airport. |
| 2026-06-10 | GREEN LAKE, WI | 60 | Significant | Public report of multiple large downed tree branches. Wind gust estimated from radar data and damage. |
| 2026-06-10 | RIPON, WI | 60 | Significant | Report from a 911 call center of a downed tree on a house in Ripon. Wind gust estimated from radar data and damage. |
| 2026-06-10 | 1 WSW Rush Lake, WI | 47 | Significant | Mesonet station WIRPN Ripon. |
| 2026-06-10 | FOND DU LAC, WI | 60 | Significant | Reports of several trees down in the communities of Fond du Lac and Brandon. Wind gust estimated from radar data and damage. |
| 2026-06-10 | OSHKOSH, WI | 70 | Severe | Thunderstorm winds downed numerous trees and power lines in Oshkosh. The time of this report is an estimate based on radar data. |
| 2026-06-10 | 2 SSE Greenville, WI | 45 | Moderate | Measured at the Appleton International Airport. |
| 2026-06-10 | DARBOY, WI | 64 | Severe | Thunderstorm winds downed trees and power lines near Darboy. |
The most recent quarter-size-or-larger hail storm recorded by NOAA within 25 miles of Oshkosh was on August 18, 2026. HailCheck refreshes from the NOAA Storm Events database daily, so newer events appear here as they are reported.
Oshkosh averages roughly 17 reported hail events per year within a 25-mile radius. Significant storms (quarter-size or larger) account for 47 of the 85 events recorded over the last five years.
The largest documented hail near Oshkosh in the last five years was baseball-sized or larger. Most Oshkosh-area hail falls in the marble-to-quarter range, with destructive storms (egg-size or larger) appearing roughly once every few years.
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.
Use the HailCheck address search to enter any street address in or near Oshkosh. HailCheck returns every NOAA hail event within a configurable radius, along with severity bands, dates, and storm narratives for Pro members.
If your property in or near Oshkosh 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 ValidationOshkosh 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.