◆ ALTOONA, WI HAIL HISTORY · EAU CLAIRE COUNTY
Altoona, WI hail history & hail map
Altoona, Wisconsin has had 2 hail events in the past 5 years, with hail up to 4.00″ (Softball). Most recent: Sep 3, 2025. Free hail map, storm dates and NWS/CoCoRaHS reports.
✓ Data compiled by a degreed meteorologist from NOAA & NWS sources
2Hail events in the past 5 years
4.00″Largest recorded hail · Softball
4.00″Largest ground report (within 3 mi)
1.25″Largest radar-estimated hail
Radar hail swaths (NOAA MRMS MESH) in the past 5 years over Altoona, shaded by hail size; blue dots are ground reports.
Recent hail storm dates in Altoona
| Date | Peak hail | Sources |
|---|---|---|
| Sep 3, 2025 | 0.10″ Small | 1 ground report (max 0.10″) |
| May 15, 2025 | 4.00″ Softball | Radar 1.25″ · 12 ground reports (max 4.00″) |
More Wisconsin hail history
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Events count days with NOAA MRMS radar hail over Altoona (44.810, -91.430) or an NWS / CoCoRaHS hail report within 3 miles. Data window: NOAA MRMS radar hail swaths Oct 2021 – Nov 2026; NWS / NCEI Storm Events reports Nov 2024 – Jul 2026; CoCoRaHS volunteer reports Oct 2021 – present. Radar hail sizes are estimates, not ground truth; hail at any single address can differ.