Hail history in Boulder County, CO
Hail of 1 inch or larger was reported in Boulder County on 5 days between Jan 1, 2025 and Oct 26, 2026. The largest was 1.00 in (quarter) on Jul 28, 2026, near Lyons.
Was your property hit?
Get a certified satellite report for your address and date: what GOES satellites, NOAA radar and nearby storm reports recorded over your property, reviewed by a person and delivered in about one business day.
Every hail day in Boulder County
| Storm day | Largest hail | Reports | Near | |
|---|---|---|---|---|
| Jul 28, 2026 | 1.00 in (quarter) | 1 | Lyons | Report for this date → |
| Aug 10, 2025 | 1.00 in (quarter) | 1 | 3 S Niwot | Report for this date → |
| Jul 11, 2025 | 1.00 in (quarter) | 1 | 1 NNW Louisville | Report for this date → |
| Jun 17, 2025 | 1.00 in (quarter) | 2 | 2 WNW Lafayette | Report for this date → |
| May 18, 2025 | 1.00 in (quarter) | 1 | 3 NNW Marshall | Report for this date → |
When hail falls in Boulder 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.
- 1 NNW Louisville1 report
- 1 W Erie1 report
- 2 WNW Lafayette1 report
- 3 NNW Marshall1 report
- 3 S Niwot1 report
- Lyons1 report
More hail history in Colorado
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.