About Storm Station 247

What it is

Storm Station 247 is an independent weather service for the United States, published at stormstation247.com. It shows the weather now and the forecast for every state, city, town, airport, beach, mountain pass and river or lake gauge, the severe weather alerts in force, radar, and 79,203 weather instruments, each on its own page.

Every figure is in degrees Fahrenheit, miles an hour, inches, feet and miles. A reading that did not arrive prints a hyphen.

Where the readings come from

Each station is read from its operator's own published feed, on the station's own schedule, and every answer is recorded: what arrived, when, and how long it took. A network whose operator keeps its data as its own is not shown, sold or kept. The licences the site works under, and the credit each asks for, are on Sources and citations.

How a station is ranked

The 247 Rank orders each state's stations every day by their 247 score out of 100, made of six parts: the share of their scheduled reports received, how soon those reports arrive, their longest silence, how closely their temperature follows a reference station, how their readings pass their checks, and how they stand against the forecast checked the next day. A station that falls silent or starts to read wrong drops, and its page shows its score part by part. How a station is ranked sets out each part and its weight.

How a forecast is scored

Every forecast is kept and scored against what the instruments then measured, hour by hour, and the results are published on Forecast accuracy, misses included.

Always free

Severe weather alerts are free and complete for everyone, without an account or a payment. Every alert in force is on one page, by county. The API sells data by the call or by the month; it never sells the warning itself.

Reference and machines

The Field Book explains the weather, the instruments and the sky, and cites its sources by name. The developer guide and the OpenAPI contract describe the API, and llms.txt describes the site for a language model.

Corrections and contact

A wrong reading, a missing station or a mistake on any page can be reported through Contact. Station operators can ask to have an instrument listed there too.