Recorded events
Hail and wind recorded near Anaheim
Hail is not common here, which is exactly why the days it has happened are worth writing down. Within ten miles of Anaheim, on one day: 19 March 2024.
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What the radar recorded
The most recent detection was on 19 March 2024, about 3 years ago. Radar sized the largest stone in that cell at about 0.5 inches, small, and unlikely on its own to have marked a sound roof. The nearest cell was about 7.3 miles away, which is close enough to be worth checking and far enough that it may have missed the house entirely.
| Date | Largest stone sized by radar | Nearest cell | Cells that day |
|---|---|---|---|
| 19 March 2024 | 0.5 in | 7.3 mi | 6 |
The wind record
Over 5 years of daily records at this location, the highest modelled gust was about 55 mph, below the 58 mph severe threshold but well into the range that finds anything already lifted or loose. There were 21 days above 39 mph and 7 above 45 mph in that period, concentrated in January, February, and November.
| Date | Peak gust |
|---|---|
| 6 November 2024 | 55 mph |
| 14 March 2024 | 45 mph |
| 20 November 2023 | 46 mph |
| 21 March 2023 | 45 mph |
| 25 February 2023 | 46 mph |
| 8 November 2022 | 46 mph |
| 14 December 2021 | 51 mph |
| 24 November 2021 | 44 mph |
What to check afterwards
Flashing, chimneys and skylights
Penetrations are where a roof is joined rather than laid, and joins fail first. After a wind event they are the first thing worth having looked at properly.
Granules where they should not be
Look in the splash blocks and at the base of the downspouts. Granule loss concentrated in one area, rather than spread evenly, is the pattern that points at impact rather than at age.
The ridge and the edges
Wind does not lift a roof from the middle. It gets under an edge — the rake, the eave, the ridge cap — and peels inward from there. Those are the places to look at from the ground with binoculars after a wind event, and they are the places a marginal roof gives up first.
What landed on it
Wind-blown debris causes a surprising share of storm damage, and it is the one kind of damage that is genuinely obvious once somebody looks.
Inside, before outside
Go into the attic on a bright day with the lights off. Daylight through the deck, fresh staining on the sheathing, or a rust track down a nail shank all say water got in. The attic shows it long before a ceiling does, and dated photographs of it are worth a great deal later.
About this data
Hail detections come from NOAA NCEI’s Severe Weather Data Inventory (NEXRAD product nx3hail) within 10 miles of Anaheim. Radar sizes hail in a storm cell; it does not observe what landed on any particular roof. Gust figures are daily maxima from the ERA5 reanalysis archive at this city’s coordinates, which is a model of the weather rather than a reading from an instrument in the neighbourhood. Both are useful for dates and for scale, and neither is evidence about your roof. Last refreshed 2026-08-31.
Storm damage questions
There was a storm near me. Do I have damage?
A recorded storm nearby is a reason to have the roof looked at, not evidence that anything happened to it. The useful first check costs nothing: dents in the soft metal around the roof, and a look in the attic on a bright day.
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