Hail in Thornton, CO on May 9, 2023
Radar-estimated up to 1.5" (ping-pong ball size) · 2 ground reports
Weather radar estimated hail of up to 1.5" (ping-pong ball size) over Thornton between 5:51 PM and 6:08 PM, from 17 separate radar hail signatures inside the town. On the ground, 2 reports were filed in Thornton; the largest measured 1" (quarter size).
Ground reports filed in Thornton
| Time | Hail size | Source |
|---|---|---|
| time not given | 1" (quarter size) | NOAA Storm Events (social media) |
| time not given | 0.75" (penny size) | NOAA Storm Events (trained spotter) |
What ping-pong ball-size hail does to a roof
Hail in this range commonly bruises asphalt shingles and knocks off the protective granules. The roof may look fine from the street and still have lost years of life; soft metals like vents and gutters usually show the dents first. 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 May 9
- Frederick, CO · May 9, 2023radar up to 3.75" (teacup size) · 2 reports
- Firestone, CO · May 9, 2023radar up to 3.5" (teacup size) · 2 reports
- Mead, CO · May 9, 2023radar up to 3.5" (teacup size)
- Erie, CO · May 9, 2023radar up to 2.75" (baseball size) · 2 reports
- Longmont, CO · May 9, 2023radar up to 2.75" (baseball size) · 2 reports
- Dacono, CO · May 9, 2023radar up to 2.25" (hen egg size)
- Milliken, CO · May 9, 2023radar up to 1.75" (golf ball size)
- Brighton, CO · May 9, 2023radar up to 1.25" (half dollar size) · 1 report
- Commerce City, CO · May 9, 2023radar up to 1.25" (half dollar size) · 1 report
- Severance, CO · May 9, 2023radar up to 1.25" (half dollar size)
- Fort Lupton, CO · May 9, 2023radar up to 1" (quarter size)
- Windsor, CO · May 9, 2023radar up to 1" (quarter size)
Other hail days in Thornton
- September 6, 2026radar up to 1.25" (half dollar size)
- June 8, 2026radar up to 1.5" (ping-pong ball size)
- June 17, 2025radar up to 2" (hen egg size) · 7 reports
- June 1, 2025radar up to 1.25" (half dollar size)
- August 6, 2024radar up to 1.25" (half dollar size)
- July 20, 2024radar up to 1" (quarter size) · 1 report
- May 30, 2024radar up to 3.5" (teacup size) · 10 reports
- August 3, 2023radar up to 1.25" (half dollar size) · 2 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.