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Recorded events

The wind record for Los Alamitos

Los Alamitos does not get hail in any quantity — five years of radar detections found none within ten miles. It does get wind, on a handful of days a year, and those are the days roofs are lost here.

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What the radar recorded

Across 61 months of NEXRAD records, no hail-bearing storm cell has been detected within ten miles of Los Alamitos. That is normal for this part of California and it is the reason roof claims here are almost always wind, water or age rather than impact.

Wind

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 26 days above 39 mph and 7 above 45 mph in that period, concentrated in January, February, and March.

Highest modelled daily wind gusts at Los Alamitos
DatePeak gust
18 February 202651 mph
3 April 202345 mph
1 March 202344 mph
25 February 202355 mph
21 February 202344 mph
12 April 202244 mph
14 December 202149 mph
11 October 202149 mph

What to look at after a storm

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.

What the street is doing

If several roofs on the street are being worked on and yours is the same age and the same covering, that is a reason to have yours looked at. It is not a reason to assume you have damage, and a contractor who tells you the whole street is getting a new roof paid for by insurance is telling you something about themselves.

The soft metal, first

Start with the parts that bruise easily: gutter faces, downspouts, vent hoods, the aluminium trim. They are the network of soft targets around the roof, and they record a hail event more legibly than the shingles do. Clean metal is meaningful evidence.

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.

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.

How the deadline works

Every policy sets a period within which a loss has to be reported, measured from the event rather than from the discovery. That is the practical reason a dated record of local storms is useful to a homeowner at all.

What it does not mean is that a nearby storm implies damage on your roof. Two houses on one street come out of the same night in completely different condition.

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Sources, and what they can and cannot tell you

Hail detections come from NOAA NCEI’s Severe Weather Data Inventory (NEXRAD product nx3hail) within 10 miles of Los Alamitos. 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.

Questions after a storm

Where do the storm dates on this site come from?

Hail comes from NOAA’s Severe Weather Data Inventory — radar detections of hail-bearing storm cells within ten miles of Los Alamitos, with an estimated stone size. Wind comes from the ERA5 reanalysis archive as a daily maximum gust at this city’s coordinates. Both are useful for dates and scale. Neither is an observation of your roof, and we do not present them as one.

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.

How long do I have to report storm damage?

Less time than most people assume, and the clock runs from the date of the event rather than from the day you noticed. Policies require prompt notice and set an outer limit on reporting. That is the single most common reason late-discovered damage is denied, and it is why knowing the date of the storm matters.

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