Hail history in Jefferson County, WI
Hail of 1 inch or larger was reported in Jefferson County on 6 days between Jan 1, 2025 and Oct 26, 2026. The largest was 2.75 in (baseball) on Apr 14, 2026, near 2 SE Watertown.
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Every hail day in Jefferson County
| Storm day | Largest hail | Reports | Near | |
|---|---|---|---|---|
| Jul 27, 2026 | 1.25 in (half dollar) | 1 | 1 SW Lac La Belle | Report for this date → |
| Apr 17, 2026 | 1.00 in (quarter) | 1 | Watertown | Report for this date → |
| Apr 14, 2026 | 2.75 in (baseball) | 9 | 2 SE Watertown | Report for this date → |
| May 15, 2025 | 2.50 in (tennis ball) | 2 | 1 SE Ixonia | Report for this date → |
| Apr 18, 2025 | 2.00 in (hen egg) | 10 | 3 SE Fort Atkinson | Report for this date → |
| Apr 17, 2025 | 1.00 in (quarter) | 1 | 5 N Lake Mills | Report for this date → |
When hail falls in Jefferson County
Where hail was reported
Places named in the reports, given as distance and direction from the nearest town, as the National Weather Service logs them.
- Watertown4 reports
- 1 SW Palmyra2 reports
- 4 NW Lake Mills2 reports
- Waterloo2 reports
- 1 SE Ixonia1 report
- 1 SW Lac La Belle1 report
- 2 S Watertown1 report
- 2 SE Watertown1 report
- 3 NE Ixonia1 report
- 3 NE Johnson Creek1 report
More hail history in Wisconsin
See a sample satellite hail report →
Source and method
NOAA Storm Prediction Center preliminary local storm reports of hail 1 inch or larger, Jan 1, 2025 to Oct 26, 2026 (updated Oct 27, 2026). Dates are SPC storm days, which run from 12:00 UTC to 12:00 UTC (about 7 a.m. to 7 a.m. Central), so a late-night storm appears on the day it started. Reports come from spotters, the public and NWS offices: they can be revised, and a storm nobody reported is missing. SPC storm reports.
A Skybridge report goes further for one address and date: GOES satellite cloud-top and lightning data, NOAA MRMS radar hail size and these storm reports within 50 km, in one document reviewed by a person, with a code anyone can verify.