Alerts from the public record

The storm days of record, sent to your territory.

A territory alert arrives within hours of a storm day entering the record in your states, or within 30 miles of up to 5 places you name: the date, how many independent sources carried it, whether hail was measured on the ground, and the link to the day's page. The weekly digest lists the last 7 days' storm days of record in the same territory every Monday. Nothing is sent that is not on the record, and every email is a note a file can cite.

An address, what to send, and the territory. Nothing is sent until the confirmation link is opened, and every email carries the link that stops them.

What arrives

Territory alert One email per storm day that touches your territory, with the date, the sources, the largest hail measured and detected, and the link to the day's page. Sent within hours of a storm day entering the record. Weekly digest One email a week listing the storm days of record in your territory over the last seven days, busiest first, with the same figures. Sent every Monday.

States in the territory

Places, within 30 miles

Optional. Up to 5 cities or towns inside the states chosen; a report within 30 miles of a place's centre counts, whichever state it was filed under. Each alert links the place to its own hail history.

Threshold

Any corroborated day Every storm day of record carried by 2 or more independent sources in the territory, whether or not hail was measured on the ground. Measured hail of 1.00 inches or more Only days on which hail of at least 1.00 inches was measured by a person or an instrument in the territory, carried by 2 or more independent sources. Detected sizes never clear it.

Alerts name evidence kinds and counts, never a dataset, and link to the free pages. They say a storm day is on the record in a territory; they do not say what reached any roof.

How an alert is decided

What counts as an alert day: A storm day that has earned a page of its own: at least 25 hail reports on the record nationally, or hail of 2.00″ or more measured on the ground and carried by two or more independent sources. Of those, the days with at least one report filed under one of your states or within 30 miles of one of your places.
Provisional and settled: A day is sent while the federal record for it is still being written, and the alert says so. The day's page is rebuilt as the record changes and rendered from the settled record once there is one. A day is sent once; the page is where it grows.
Measured and detected: A report from a person or an instrument is measured. A size inferred from a grid is a detection and is marked as one, in the alert as on every page. The threshold that asks for measured hail is never cleared by a detection.
How often: Territory alerts are checked hourly, behind the ingest, and a day older than 30 days is never sent: a late revision to an old day changes its page, not your inbox. The digest is sent on Monday and covers the 7 days before it.
What this is not: An alert says a storm day is on the public record in a territory. It does not say what reached any roof, it names no dataset and no distance from an address, it attaches nothing, and it states no opinion about a property. Records are reproduced as the federal sources published them. The report is the document for the roof.
Terms used on this page: Storm day, independent source, measured and detected: each term this page uses is defined in the glossary as the alert prints it. The record the alerts are drawn from is the hail history and the wind history, by state and by city.

The next step

The alert is the day. The report is what reached the roof.

An alert says a storm day is on the record in your territory: the date, the sources, the largest hail measured and detected. None of it says what reached one address.

Run the address and the same archive is searched at the property: each report's distance and bearing from the roof, the measured size, the sources by name, and the federal record each figure came from, in a document that states its own method.

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About this record

Everything here is reproduced from public federal and volunteer weather records, as the agencies and observer networks that publish them released it. Titan Weather compiles the record; it does not observe the weather, and it is not affiliated with any source it cites.

No archive holds everything. Storms cross places where nobody is standing, instruments and spotters cover some areas better than others, sources revise their records, and recent reports can take weeks to arrive and settle. Where this page shows nothing, nothing was found in the sources searched, within the period and area it states. That is not a finding that no weather occurred.

These pages describe the public record near a place or on a date. They do not establish what reached any particular property, and nothing here is insurance, legal or engineering advice.