Hail in Louisville, CO on July 11, 2025
Reported 1" (quarter size)
Weather radar did not flag hail of one inch or more over Louisville that day. On the ground, 1 report was filed in Louisville; the largest measured 1" (quarter size).
Ground reports filed in Louisville
| Time | Hail size | Source |
|---|---|---|
| 6:27 PM | 1" (quarter size) | NWS spotter report (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 July 11
Other hail days in Louisville
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.