Hail in Boulder, CO on June 21, 2023
Reported 1" (quarter size)
Weather radar did not flag hail of one inch or more over Boulder that day. On the ground, 1 report was filed in Boulder; the largest measured 1" (quarter size).
Ground reports filed in Boulder
| Time | Hail size | Source |
|---|---|---|
| time not given | 1" (quarter size) | NOAA Storm Events (trained spotter) |
What quarter-size hail does to a roof
One inch is the size where insurers and roofers start to expect shingle damage, especially on older roofs. Look for dented gutters and downspouts and granules collecting at the bottom of the downspouts. Radar describes the storm, not your shingles: the only way to know what a particular roof took is an inspection. Most homeowner policies set a deadline for reporting storm damage, so check your policy.
Every home inside a storm's radar footprint, scored by roof age, material and hail history, sold to a few roofers only so you are not the twentieth truck on the street.
Other Colorado towns hit on June 21
- Evergreen, CO · Jun 21, 2023radar up to 3.25" (teacup size) · 2 reports
- Morrison, CO · Jun 21, 2023radar up to 3.25" (teacup size) · 1 report
- Black Forest, CO · Jun 21, 2023radar up to 3" (teacup size)
- Colorado Springs, CO · Jun 21, 2023radar up to 3" (teacup size)
- Denver, CO · Jun 21, 2023radar up to 2.5" (tennis ball size) · 4 reports
- Falcon, CO · Jun 21, 2023radar up to 2.5" (tennis ball size)
- Fountain, CO · Jun 21, 2023radar up to 2.5" (tennis ball size)
- Fort Collins, CO · Jun 21, 2023radar up to 2" (hen egg size) · 1 report
- Thornton, CO · Jun 21, 2023radar up to 2" (hen egg size) · 1 report
- Conifer, CO · Jun 21, 2023radar up to 1.75" (golf ball size) · 1 report
- Pine, CO · Jun 21, 2023radar up to 1.75" (golf ball size)
- Broomfield, CO · Jun 21, 2023radar up to 1.5" (ping-pong ball size)
Other hail days in Boulder
- June 17, 2025radar up to 1.25" (half dollar size)
- May 18, 2025radar up to 1" (quarter size) · 2 reports
- July 28, 2023radar up to 1.25" (half dollar size)
- June 12, 2023radar up to 1.5" (ping-pong ball size) · 1 report
- October 1, 2022radar up to 1.25" (half dollar size)
- July 27, 2022radar up to 1.75" (golf ball size)
Radar sizes are estimates from NEXRAD hail signatures (NOAA Severe Weather Data Inventory) for the largest stones in a storm cell, not a measurement at any one home. Ground reports are National Weather Service local storm reports and the NOAA Storm Events Database, as filed. Town-level data only; this page shows no addresses and no homeowner information.