Kept by incident.labs@web-summit.dinis, 11 November 2026, 02:18 UTC

Lead times: warning, decision, effect

What it tries: For every decision with stated hours: the IPMA warning before it, the minute it was announced and the hours it covers, on one axis, with the notice it gave written out; then the meteorologist's own table of each warning's first signal against the hour it starts.

What it shows badly: Only a few of the graph's edges state both a minute of announcement and the hour their effect begins (the page counts them), so most decisions are absent; and the 'warning it followed' is the nearest IPMA warning up the graph, which the decision-maker may not have named.

An experiment from the Labs, one of several ways of showing the same data so they can be compared. It reads only this site's published JSON: decisions/graph.json, weather/analysis.json. Click any mark for its row or edge, its source and the time it was read. Not a warning service: for the warning itself, IPMA and ANEPC.