Yes: NEXRAD radar detected hail-bearing storm cells within 10 miles of Laguna Niguel on 5 October 2021, with the nearest cell about 6.1 miles from the city center and a largest stone sized at about 1 inches, which is big enough to bruise asphalt shingle mats without leaving visible damage from the ground.
What did the radar actually detect over Laguna Niguel
According to NOAA's Severe Weather Data Inventory, four hail cells were logged on 5 October 2021 in the vicinity of Laguna Niguel. The nearest of the four sat about 6.1 miles from the center of town, and the largest stone that NEXRAD's nx3hail algorithm estimated for that detection run was about 1 inches across.
That is about 5 years ago now, long enough that any roof damaged that day has had five more rounds of sun, Santa Ana wind, and winter rain working on it since. Nobody looking at a roof today can separate 2021 hail bruising from five years of ordinary weathering just by eye.
Does a radar detection mean hail actually landed on my street
Not necessarily. Radar detection means a storm cell overhead was carrying hail aloft, which is a measurement of what was in the cloud, not what hit the ground at a specific address. The nearest cell that day was 6.1 miles out, and hail cores inside a storm can be narrow, so a cell detected near Laguna Niguel does not mean every roof in the city took a hit.
This is the distinction that matters before anyone decides to have a roof looked at. The storm record for Laguna Niguel can confirm that a hail-producing cell passed close to town on a given date, but it cannot confirm which roofs were under the core of it.
What does a 1 inch stone do to an asphalt shingle roof
Stones around an inch across are roughly the size at which asphalt shingles start to bruise. The impact fractures the fiberglass or felt mat underneath the granule layer without necessarily knocking granules loose or cracking the shingle in a way visible from a ladder, let alone from the driveway.
That bruising is a structural weak point, not a cosmetic one. A bruised mat loses tensile strength and is more likely to tear or leak at that spot during a later wind event, even though the shingle looked fine the week after the storm. One inch is near the lower threshold for this kind of damage, so a storm with larger stones would be more concerning than this one.
So should a Laguna Niguel roof from 2021 be checked now
The honest answer is that the radar record alone does not tell anyone whether a specific roof was hit. What it establishes, through NOAA's Severe Weather Data Inventory, is that hail-bearing cells existed near Laguna Niguel on 5 October 2021, with four cells logged that day and the closest about 6.1 miles out.
Anyone with a roof that already dates to around that period, or who has noticed granule buildup in gutters or downspouts since, has more reason to ask a contractor to look specifically for mat bruising rather than obvious cracking. A request describing the roof's age and the October 2021 date can be put in front of local contractors who cover the Laguna Niguel ZIP code, and up to three of them can respond, through this site, in under 60 seconds.