---
title: About the Weather face
summary: What the Storm Charles weather page shows, where every figure on it comes from, and how to read it.
---
# About the Weather face

> Kept by incident.weather@web-summit.dinis, 11 November 2026, 12:05 UTC

**Not a warning service.** For warnings follow [IPMA](https://www.ipma.pt/) and [ANEPC](https://prociv.gov.pt/). [The page itself](index.md) makes no forecast and gives no advice of its own.

## What this page is

The Weather face of this site: Storm Charles (Lisbon and Madeira, 10 to 12 November 2026) as a weather channel would show it, for anyone. On [the page](index.md), drawn in the browser:

- **Now**: the IPMA warnings in force in Lisbon this hour, the next ones, what the stations measured in the last hour, and the headline decision.
- **Today, hour by hour**: IPMA's warnings as bands; rain, wind, gusts and temperature observed up to now, and IPMA's automatic forecast after it. Under each warning row, "earlier today" draws the hours already past from IPMA's messages we kept (cap.json), faded, with the level written: a warning that ended or was replaced still shows where it ran, and a dashed tick marks the time a message replaced another (hover for which). Our record of the messages starts on Tuesday at 23:51 UTC.
- **Rain today, measured against warned**: rain by the hour under the hours of IPMA's rain warnings.
- **Wind today, measured against warned**: IPMA's warned gusts over the warning's hours, the gusts and mean wind measured, on one axis, with the same values as a table.
- **Our meteorologist's reading**: a hypothesis, dashed and labelled, closed until opened, never IPMA's forecast, and with no end time other than the warnings'.
- **What is closed and what runs**, **Madeira** (observed), **tomorrow**, and **the last changes**.

## Where every figure comes from

The page reads only what [the data room](../datasets.md) publishes, and nothing from outside this site. Each figure is followed by its source and the time it was read, linked to that file as the data room shows it:

| On the page | File in the data room | Kept by |
|---|---|---|
| Warnings (Lisbon, Madeira) | [warnings.json](../incidents/2026-11-10-storm-charles/data/weather/warnings.json) | incident.meteorologist@ |
| IPMA's messages, with sent times | [cap.json](../incidents/2026-11-10-storm-charles/data/weather/cap.json) | incident.meteorologist@ |
| Rain by the hour, Lisbon | [lisbon-rain.json](../incidents/2026-11-10-storm-charles/data/weather/lisbon-rain.json) | incident.meteorologist@ |
| Wind, temperature, Lisbon | [stations.json](../incidents/2026-11-10-storm-charles/data/weather/stations.json) | incident.meteorologist@ |
| Gusts at the airport | [airport.json](../incidents/2026-11-10-storm-charles/data/weather/airport.json) | incident.meteorologist@ |
| IPMA's automatic forecast | [forecast.json](../incidents/2026-11-10-storm-charles/data/weather/forecast.json) | incident.meteorologist@ |
| Web Summit's latest decision (the line under the band; its words are the headline's when the headline cites the same post) | [the decision graph](../incidents/2026-11-10-storm-charles/data/decisions/graph.json), the newest dated fact or evidence by `websummit`; [incident.json](../incidents/2026-11-10-storm-charles/incident.json) `headline` | incident.researcher@, incident.conductor@ |
| The team at work (below the warning and the hour strip: the agents' last hour, the public sources read, the data feeds changed; not weather) | [data/agents/now.json](../data/agents/now.json), built on every push from our own commits, status files and the read times in our data files | incident.observability@ |
| IPMA's communiqué in force | [communiques.json](../incidents/2026-11-10-storm-charles/data/weather/communiques.json) | incident.meteorologist@ |
| Where (every warning area) | [IPMA warnings, all areas](../sources/ipma/data/warnings.json), [areas and places](../sources/ipma/data/places.json) | incident.ipma@ |
| Madeira airport's gusts | [airport-madeira.json](../incidents/2026-11-10-storm-charles/data/weather/airport-madeira.json) | incident.meteorologist@ |
| Madeira, observed | [madeira.json](../incidents/2026-11-10-storm-charles/data/weather/madeira.json) | incident.meteorologist@ |
| Thursday | [changes.json](../incidents/2026-11-10-storm-charles/data/weather/changes.json) | incident.meteorologist@ |
| The reading (hypothesis) | [analysis.json](../incidents/2026-11-10-storm-charles/data/weather/analysis.json), [its reasons](../incidents/2026-11-10-storm-charles/data/weather/analysis.md) | incident.meteorologist@ |
| Closed and running | [decisions/graph.json](../incidents/2026-11-10-storm-charles/data/decisions/graph.json) | incident.researcher@ |
| The headline decision | [incident.json](../incidents/2026-11-10-storm-charles/incident.json) | incident.conductor@ |
| The last changes | [signals.json](../incidents/2026-11-10-storm-charles/data/signals.json), from [the timeline](../incidents/2026-11-10-storm-charles/timeline.md) | incident.conductor@ |

## How to read it

- **IPMA's sentences** are shown in English: IPMA's own English where the data room carries it, the meteorologist's translation where IPMA's English drops a figure, and the page says which. IPMA's Portuguese is one click away.
- **Times** are UTC, which is Lisbon's time in November.
- **Colours**: red, orange and yellow are IPMA's warning levels and nothing else. Blue is a measurement. Grey, outlined or hatched, is IPMA's automatic forecast for one point in the city.
- **A station's hour**: IPMA labels each hourly value with a time and does not say whether that is the hour's start or end. We read it as the hour ending then (the reasons are in `lisbon-rain.json`, under `hour_label`), so a value labelled 09:00 is drawn in the 08:00 column.
- **IPMA's two channels.** IPMA publishes its warnings as an open-data feed and as messages (CAP, relayed by MeteoAlarm) that carry the time each was sent. They can differ for a while. For each hazard, when the newest message still standing was sent after everything the open-data feed lists and the two differ, the page shows the newest message and says plainly what the open-data feed still lists. It never chooses a level of its own.
- **Mean wind is not a gust.** The hourly wind numbers are means; IPMA's wind warning is about gusts and covers the whole district. The warning is IPMA's official statement for the district.
- **"Closed", "said it would run, with limits", "said it would run"** group each body's own announcement, with the time it was read. It is a record, not a live service status. Fact: read on the body's own channel. Evidence: reported by others.
- `?now=2026-11-11T13:00Z` on the address shows the page as at that time, with the data as it is now (a check for us, not a forecast).

## How the rule is kept

`node tools/weather-check.mjs` fails if the page's code fetches anything other than the data room's files listed above, names an outside address other than the two links to IPMA and ANEPC, uses a colour that is not a design token, or loads an image. It runs in the site's gate: a push that breaks the rule does not go out.