Hail in Denver, CO on June 21, 2023
Radar-estimated up to 2.5" (tennis ball size) · 4 ground reports
Weather radar estimated hail of up to 2.5" (tennis ball size) over Denver between 8:30 PM and 10:33 PM, from 36 separate radar hail signatures inside the town. On the ground, 4 reports were filed in Denver; the largest measured 1.5" (ping-pong ball size).
Ground reports filed in Denver
| Time | Hail size | Source |
|---|---|---|
| time not given | 1.5" (ping-pong ball size) | NOAA Storm Events (trained spotter) |
| time not given | 1.25" (half dollar size) | NOAA Storm Events (public) |
| time not given | 1" (quarter size) | NOAA Storm Events (public) |
| time not given | 0.88" (nickel size) | NOAA Storm Events (trained spotter) |
What tennis ball-size hail does to a roof
Hail this large routinely cracks and punctures asphalt shingles, dents metal vents and gutters, and can break skylights. Damage is often visible from the ground, but bruised shingles that look intact can still fail early. 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)
- 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)
- Fort Lupton, CO · Jun 21, 2023radar up to 1.5" (ping-pong ball size)
Other hail days in Denver
- August 26, 2026radar up to 1" (quarter size)
- August 15, 2026radar up to 1.25" (half dollar size)
- August 14, 2026radar up to 2.25" (hen egg size) · 2 reports
- June 24, 2026radar up to 1.75" (golf ball size)
- June 8, 2026radar up to 1.75" (golf ball size) · 1 report
- June 1, 2026radar up to 2.25" (hen egg size) · 16 reports
- August 10, 2025radar up to 1" (quarter size)
- July 6, 2025radar up to 1.5" (ping-pong ball size) · 3 reports
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.