On 11 May 2022 the modeled gust at Fullerton peaked around 40 mph, well short of the 58 mph severe-wind threshold but strong enough to find anything on a roof that was already loose, cracked, or poorly fastened.
How strong was the wind that day, really
According to the Open-Meteo ERA5 reanalysis archive, the daily maximum 10 m gust modeled at Fullerton's location on 11 May 2022 was about 40 mph. That number comes from a reanalysis model, not a wind gauge standing on a street in Fullerton, so it should be read as an estimate for comparing one day's wind against another, not a precise measurement of what hit any single roof.
Forty mph sits in a specific zone. It is nowhere near the 58 mph mark that meteorologists treat as the threshold for severe wind, the kind that can tear sound shingles off a roof outright. But it is far from calm. It is the kind of gust that tests every weak point a roof already had before the wind ever started.
What does a 40 mph gust actually do to shingles
A gust in this band rarely rips healthy material loose. Asphalt shingles installed correctly, with full nail counts and intact sealant strips, are built to shrug off wind well above 40 mph. What this gust band does instead is work on anything that was already compromised: a shingle tab with a cracked seal, a ridge cap with pulled nails, flashing that had started to lift at an edge.
That is the real risk of a day like 11 May 2022. It is not the storm that announces itself. It is the one that quietly finishes off something that had been failing slowly for months, whether from age, prior wind, or a bad original install. The damage afterward tends to be small and localized rather than dramatic.
Is there an official record of this wind event
The storm record for Fullerton is the relevant local history to check if you are trying to connect a date to a roofing problem. It covers wind and hail events over time for the area, and it's a reasonable place to cross-reference a specific date like 11 May 2022 against other weather on record for the city.
The reanalysis gust figure and the storm record are two different things: one is a modeled daily estimate for the exact city location, the other is a broader event log. Neither replaces walking the roof line or getting on a ladder, but together they're a way to confirm that a given date was windy enough to be worth asking about.
What should a homeowner check after a day like this
Start at the edges. Ridge caps, hip lines, and rake edges are the first places a 40 mph gust finds a loose nail or a lifted shingle tab. A pair of binoculars from the ground will usually show a lifted tab or a missing shingle without anyone needing to get on the roof.
Inside, check the attic or top-floor ceiling for a new water stain, since a lifted shingle doesn't always show from the street but can let water in during the next rain. If something looks off, the next step is getting it in front of someone who covers roofs in your ZIP code.
That's what this service is for: submit the request and it goes out to local contractors covering the Fullerton ZIP code automatically, in under 60 seconds, and up to three of them can take it on. Nobody here inspects or prices anything, so the quotes that come back are between the reader and the contractor.