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 115 hail storms within 25 miles of Winona, MN. Of those, 95 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 40 documented hail events.
Check Hail History for a Specific Address in Winona| Severity | Count | What it means for roofs |
|---|---|---|
| Catastrophic | 7 events | Baseball+ size, structural roof damage likely |
| Destructive | 10 events | Egg-size, expect mat fractures and gutter damage |
| Severe | 26 events | Ping pong-size, granule loss and bruising common |
| Significant | 52 events | Quarter-size, the standard insurance damage threshold |
| Moderate | 20 events | Marble-size, possible cosmetic damage |
| Year | Reported Hail Events Within 25 mi |
|---|---|
| 2026 | 40 events |
| 2025 | 10 events |
| 2024 | 17 events |
| 2023 | 26 events |
| 2022 | 19 events |
| 2021 | 3 events |
2026 was the busiest hail year on record locally for Winona, with 40 documented events inside the 25-mile radius. Storm activity in Winona 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 |
|---|---|---|---|---|
| 2026-09-02 | 6 ENE Pickwick, MN | Severe | 1.50" | Multiple reports of 1 to 1.5 inch hail sizes. Time estimated from radar. |
| 2026-08-18 | Saint Charles, MN | Significant | 1.00" | — |
| 2026-08-18 | 1 WNW Onalaska, WI | Significant | 1.25" | — |
| 2026-08-18 | 1 NE Onalaska, WI | Significant | 1.00" | Report by trained spotter with photo of 1 inch hail. Time estimated by radar. |
| 2026-08-18 | 2 S Holmen, WI | Significant | 1.00" | — |
| 2026-06-30 | INDEPENDENCE, WI | Severe | 1.75" | Law enforcement reported golf ball sized hail near Independence. |
| 2026-06-30 | Independence, WI | Severe | 1.75" | Relayed by 911 call center. |
| 2026-06-10 | NEW AMSTERDAM, WI | Severe | 1.50" | A trained spotter reported ping pong ball sized hail 1 mile east of New Amsterdam. |
| 2026-06-10 | Brice Prairie, WI | Significant | 1.00" | Time estimated from radar. |
| 2026-06-10 | LYTLE, WI | Significant | 1.00" | The public reported quarter sized hail 2 miles east-southeast of Lytle. |
| 2026-06-10 | MIDWAY, WI | Significant | 1.00" | The public reported quarter sized hail near Midway. The report was relayed via mPING. |
| 2026-06-10 | 1 ESE New Amsterdam, WI | Severe | 1.50" | — |
| 2026-06-10 | 1 S Holmen, WI | Significant | 1.00" | Report from mPING: Quarter (1.00 in.). |
| 2026-06-10 | LAMOILLE, MN | Moderate | 0.88" | Emergency management reported nickle sized hail 1 mile northwest of Lamoille. |
| 2026-06-10 | 5 ENE Pickwick, MN | Moderate | 0.88" | — |
| 2026-06-06 | 1 SSW Onalaska, WI | Significant | 1.00" | Time estimated from radar. |
| 2026-06-06 | 2 ENE Goodview, MN | Severe | 1.75" | — |
| 2026-06-06 | 1 NW Winona, MN | Severe | 1.50" | Emergency management reported ping pong ball sized hail. |
| 2026-06-06 | 1 NW Fountain City, WI | Severe | 1.50" | — |
| 2026-06-05 | ONALASKA, WI | Significant | 1.00" | The public reported quarter sized hail near Onalaska. |
NOAA has recorded 102 high-wind events within 25 miles of Winona, MN in the past five years. Of those, 99 reached severe-thunderstorm thresholds (58+ mph). The highest measured gust was 75 mph.
| Severity | Count |
|---|---|
| Severe | 35 events |
| Significant | 64 events |
| Moderate | 3 events |
| Date | Location | Gust (mph) | Severity | NOAA Comments |
|---|---|---|---|---|
| 2026-09-02 | Saint Charles, MN | 63 | Significant | Personal Weather Station. |
| 2026-09-02 | 1 S Holmen, WI | 57 | Significant | — |
| 2026-09-02 | 6 W Arcadia, WI | 54 | Significant | — |
| 2026-09-02 | 2 NE New Amsterdam, WI | 67 | Severe | — |
| 2026-08-18 | 2 NNE French Island, WI | 67 | Severe | ASOS station KLSE La Crosse Regional Airport. |
| 2026-06-19 | WAUMANDEE, WI | 58 | Significant | Emergency management reported trees and power lines down 1 mile southwest of Waumandee. |
| 2026-06-11 | Mound Prairie, MN | 40 | Moderate | — |
| 2026-06-10 | ONALASKA, WI | 58 | Significant | The public reported large tree branches of 2 to 3 inches in diameter down in Onalaska. |
| 2026-06-10 | BLUFF SIDING, WI | 69 | Severe | The public reported several instances of tree and building damage in Bluff Siding. |
| 2026-06-10 | WINONA, MN | 58 | Significant | Emergency management reported a couple of trees down near Winona. |
| 2026-06-10 | MINNESOTA CITY, MN | 58 | Significant | The public reported a tree down near Minnesota City. The report was relayed via social media. |
| 2026-06-10 | MONTANA, WI | 63 | Significant | Emergency management reported a pole barn damaged and a couple trees downed 2 miles east-southeast of Montana. |
| 2026-06-10 | WINONA, MN | 69 | Severe | The public reported a large tree uprooted near the Lake Park Lodge in Winona. |
| 2026-06-10 | INDEPENDENCE, WI | 58 | Significant | Emergency management reported a tree down near Independence. |
| 2026-06-10 | CENTERVILLE, WI | 58 | Significant | The public reported an outdoor animal cage damaged in Centerville. The report was relayed via social media. |
| 2026-06-06 | 2 N Waumandee, WI | 60 | Significant | Also nickel size hail. |
| 2026-06-05 | GARDEN VLY, WI | 60 | Significant | The public reported a 60 mph wind gust in addition to nickel sized hail 1 mile west of Garden Valley. |
| 2026-05-17 | LEWISTON, MN | 58 | Significant | The public reported damage to 3 foot diameter trees near Lewiston on Highway 14. |
| 2025-07-28 | HOUSTON, MN | 69 | Severe | The public reported numerous trees down 1 mile east-southeast of Houston. |
| 2025-07-28 | WEST LA CROSSE, WI | 58 | Significant | The public reported a large maple tree downed in the city of La Crosse. |
The most recent quarter-size-or-larger hail storm recorded by NOAA within 25 miles of Winona was on September 2, 2026. HailCheck refreshes from the NOAA Storm Events database daily, so newer events appear here as they are reported.
Winona averages roughly 23 reported hail events per year within a 25-mile radius. Significant storms (quarter-size or larger) account for 95 of the 115 events recorded over the last five years.
The largest documented hail near Winona in the last five years was baseball-sized or larger. Most Winona-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 MN 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 Winona. 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 Winona 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 ValidationWinona 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.