On 8 November 2022 the modelled gust at Brea reached about 45 mph, a strong but not severe reading that is below the 58 mph threshold yet high enough to pull at shingles, flashing, or anything already loose on a roof.
What actually happened on 8 November 2022
According to the Open-Meteo ERA5 reanalysis archive, the daily maximum 10 m wind gust modelled at Brea on 8 November 2022 was about 45 mph. That is a single number for the whole day, the peak gust the model assigns to that location, not a continuous reading and not a measurement from a mast in the street.
Forty-five mph sits in what gets called the strong band. It is well below the 58 mph mark that separates strong from severe. Nothing about that day qualifies as a severe wind event on its own. The number matters because it tells you the ceiling of force that roofs in Brea were under that day, not that every roof felt it equally.
What a 45 mph gust does to a roof and what it does not
A gust in the strong band does not typically strip sound roofing. It does not tear off properly nailed shingles or lift flashing that was installed correctly. What it does is find anything that was already compromised: a shingle with failed sealant strips, a ridge cap with pulled fasteners, flashing around a vent pipe that had already started to lift at one edge.
That distinction matters for anyone trying to figure out whether a storm caused damage or just exposed it. A 45 mph gust is a stress test on existing weak points, not a force capable of damaging an intact roof system on its own. The roofs most likely to have taken on new damage that day were ones with pre-existing wear, not roofs that were otherwise sound going into November 2022.
Why this gust figure is worth comparing against other storms
The value for 8 November 2022 is only useful in context. According to the storm record for Brea, gust days can be lined up against each other to see which ones crossed into territory worth checking after. A 45 mph day sits above routine wind and below the 58 mph severe line, which puts it in a middle category: not a day to ignore, not a day that guarantees damage either.
This is the right way to use ERA5-derived gust data: as a comparison tool across dates, not as a precise record of what hit a specific roof. Two days with similar modelled gusts can produce very different outcomes depending on roof age, fastening quality, and what was already loose before the wind arrived.
What is worth checking on a Brea roof after a day like this
After a gust day in the strong band, the things worth a look are the small mechanical points: ridge cap fasteners, flashing edges around chimneys and vents, and any shingle tabs that were already curling or cracked before the storm. These are the parts of a roof that a 45 mph gust is capable of moving, even though it cannot lift a properly fastened roof covering wholesale.
Anyone who noticed debris, lifted shingle edges, or granules in the gutters after 8 November 2022 has a reasonable basis for getting a second opinion rather than assuming it was cosmetic. The practical step is to put the request in front of local contractors who cover the Brea ZIP code rather than guess from the ground. A written description of what was noticed, including when it was first seen, is more useful to a contractor than a general sense that something might be wrong.