---
title: Weather Underground
summary: A network of personal weather stations on a map (Lisbon has many), each with its own page and history graph.
mount: <div class="card"><p class="kicker">Sites and apps</p><div class="wx-scroll" tabindex="0"><svg class="mg" viewBox="0 0 994 136" width="994" height="136" role="img" aria-label="Weather Underground: what it is connected to"><style>.mg text{font:12px var(--sans);fill:var(--ink)}.mg .mg-sub,.mg .mg-verb{font-size:10px;fill:var(--ink-2)}.mg-node rect{fill:var(--surface);stroke:var(--line-2)}.mg-node.me rect{stroke:var(--focus);stroke-width:2}.mg-node.unstated rect{stroke-dasharray:2 3;fill:var(--paper)}a.mg-node:hover rect,a.mg-node:focus rect{stroke:var(--focus);stroke-width:2}.mg-edge{fill:none;stroke:var(--ink-2);stroke-opacity:.55;stroke-width:1}.mg-edge.unv{stroke-dasharray:5 4}</style><path class="mg-edge" d="M610 68C685 68 685 23 760 23"><title>stated on the page: wunderground.com</title></path><text class="mg-verb" x="752" y="19" text-anchor="end">visualises</text><a class="mg-node " href="obs-personal-stations.html"><rect x="760" y="8" width="230" height="30" rx="4"/><text x="767" y="21">Personal weather stations (Weather…</text><text class="mg-sub" x="767" y="33">Observing systems</text></a><path class="mg-edge" d="M610 68C685 68 685 63 760 63"><title>stated on the page: wunderground.com</title></path><text class="mg-verb" x="752" y="59" text-anchor="end">takes as forecast input</text><a class="mg-node " href="model-ecmwf-ifs.html"><rect x="760" y="48" width="230" height="30" rx="4"/><text x="767" y="61">ECMWF IFS</text><text class="mg-sub" x="767" y="73">Models</text></a><path class="mg-edge" d="M610 68C685 68 685 103 760 103"><title>stated on the page: wunderground.com</title></path><text class="mg-verb" x="752" y="99" text-anchor="end">takes as forecast input</text><a class="mg-node " href="model-gfs.html"><rect x="760" y="88" width="230" height="30" rx="4"/><text x="767" y="101">GFS (NOAA/NCEP)</text><text class="mg-sub" x="767" y="113">Models</text></a><g class="mg-node me"><rect x="380" y="53" width="230" height="30" rx="4"/><text x="387" y="66">Weather Underground</text><text class="mg-sub" x="387" y="78">Sites and apps</text></g></svg></div><p class="wx-legend meta">Left: what points at it. Right: what it points at. Each line carries its verb; a dashed line was not confirmed on the page cited, or the site does not say; the table below gives the page and the time read for each. <span class="prov">From <a href="site-wunderground.json">site-wunderground.json</a></span></p></div>
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# Weather Underground

> Kept by incident.meteorology@web-summit.dinis, 11 November 2026, 11:36 UTC

[Where a forecast comes from](../index.md) · Sites and apps · id `site-wunderground` · [as data](site-wunderground.json)

A network of personal weather stations on a map (Lisbon has many), each with its own page and history graph.

**Address:** [https://www.wunderground.com/](https://www.wunderground.com/) (leaves this site)  
**Our page about the site** (by incident.weatherwatch@): [research/weather-sites](../../research/weather-sites/sites/wunderground.md)

## What it is connected to, and who says so

| This | Verb | That | The page that says so | Read | Check |
|---|---|---|---|---|---|
| Weather Underground | **visualises** | [Personal weather stations (Weather Underground network)](obs-personal-stations.md) | [wunderground.com](https://www.wunderground.com/about/data): "Radar Snow Data Map Information Forecasts Our forecasts are generated by our proprietary forecasting system, BestForecast , which leverages neighborhood weather data from our community. Our network of 400,000+ personal w" | 11:30 UTC, 11 Nov | stated on the page |
| Weather Underground | **takes as forecast input** | [ECMWF IFS](model-ecmwf-ifs.md) | [wunderground.com](https://www.wunderground.com/about/data): "Pressure Temperature Cloud Cover Humidity Chance of Precipitation Dew Point Forecast input A variety of inputs, including, but not limited to, ECMWF, GFS, and NAM Mostly NAM and GFS Sky Conditions Uses radar and satellit" *Listed as "forecast input" to its own system, BestForecast.* | 11:30 UTC, 11 Nov | stated on the page |
| Weather Underground | **takes as forecast input** | [GFS (NOAA/NCEP)](model-gfs.md) | [wunderground.com](https://www.wunderground.com/about/data): "Pressure Temperature Cloud Cover Humidity Chance of Precipitation Dew Point Forecast input A variety of inputs, including, but not limited to, ECMWF, GFS, and NAM Mostly NAM and GFS Sky Conditions Uses radar and satellit" *Listed as "forecast input" to its own system, BestForecast.* | 11:30 UTC, 11 Nov | stated on the page |

## Licence: what we may do with it

Not read by us. incident.weatherwatch@ recorded each site's terms: see [our page about the site](../../research/weather-sites/sites/wunderground.md) and [the licence table](../licences.md).

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Not a warning service: this page explains where data comes from. For warnings follow [IPMA](https://www.ipma.pt/pt/otempo/prev-sam/) and ANEPC.