euclid.org

What is Euclid?

Euclid (EUCLID) is a European collaboration of national lightning-detection networks. Its purpose is to detect and locate lightning across the whole European area, and to provide that lightning data with consistent quality — meaning detection efficiency and location accuracy are meant to be comparable from one country to another rather than varying by national network.

What that means in practice

• It is a data and detection network, not a consumer weather app or a forecasting service. The output is lightning observations.
• Coverage is pan-European. The listed countries span most of Europe, from Portugal, Ireland and the UK through Scandinavia (Norway, Sweden, Finland, Denmark) to Poland, the Balkans and Greece-adjacent states such as North Macedonia, Albania and Montenegro.
• The value of a single coordinated network is homogeneity: a strike near the French–German border and one in Italy should be recorded to similar standards, which matters when you compare or combine data across borders.

Who tends to use it

• Meteorological services and researchers needing consistent, cross-border lightning records.
• Operators of infrastructure, aviation, power grids or outdoor events who need to know where lightning is occurring in real time.
• Anyone building a European lightning dataset who would otherwise have to stitch together national feeds with differing quality.

A practical next step

If your interest is real-time monitoring, look for the network's live detection output. If your interest is analysis or a historical dataset, check what access or licensing terms apply to the data, since a detection network's observations are usually distributed under specific conditions rather than as a free public feed. Related official sources include Met Office and KNMI for national meteorological context.

How accurate is Euclid's lightning detection data?

Euclid does not publish a single accuracy figure on its homepage. What it does state is the design goal behind the network: Euclid is a collaboration among national lightning detection networks, and its stated aim is to provide lightning data for the European area with homogenous quality in terms of detection efficiency and location accuracy. In other words, the emphasis is on consistency across borders rather than on one headline number.

That distinction matters if you are choosing a data source.

What "homogenous quality" means in practice

• Detection efficiency and location accuracy are meant to stay comparable whether a strike occurs in Portugal, Poland or Norway.
• Because the network is assembled from national operators, homogenisation is the hard part: individual networks may differ in sensor type, spacing and age, and Euclid's role is to harmonise them into one product.
• Practical consequence: you can compare lightning counts or densities between countries in the same dataset without first correcting for a change in network quality at the border.

How to judge accuracy for your own use

Accuracy is not one number — it depends on what you are measuring.

A concrete next step

Write down the metric you actually need — median location error in kilometres, detection efficiency as a percentage for the flash type you care about, or timeliness in seconds — then ask Euclid or a reseller for that figure for your specific area and period. If you are comparing options, Blitzortung and Météorage are other European-focused sources whose published accuracy statements you can weigh against Euclid's homogeneity claim.

How can I access real-time lightning data for Europe?

Access real-time European lightning data through EUCLID, a collaboration of national lightning-detection networks that covers the European area with consistent detection efficiency and location accuracy. Its homepage presents the network as the entry point for real-time lightning detection across the continent.

What EUCLID covers

The network lists coverage across much of Europe, including Austria, Belgium, France, Germany, Italy, the Netherlands, Norway, Poland, Spain, Sweden, Switzerland, the United Kingdom and many neighbouring countries. Coverage is described as homogeneous in quality, meaning detection performance and location accuracy are intended to be consistent across the area rather than varying sharply at national borders.

How to get access

The homepage is a gateway, not a self-service data portal. To obtain real-time feeds, you would typically contact the network or its national partners to discuss:

• The geographic area you need
• Whether you require a live stream or historical archives
• The format and latency your application can handle
• Any licensing terms for commercial or research use

Practical example

A utility operator tracking thunderstorms approaching a wind farm in Denmark would want low-latency strike data for the North Sea and Nordic region. A research group studying pan-European storm climatology might instead prioritise consistent quality across many countries and longer historical records. Both needs point to the same network but different access arrangements.

Decision criterion

If your priority is uniform quality across borders, a collaborative network like EUCLID is a natural fit. If you only need one country, a national meteorological service may offer a simpler or cheaper route. Confirm coverage, latency and licensing directly before committing to an integration.

For related official sources, see Météorage and Deutscher Wetterdienst.

Which European countries are covered by the Euclid network?

The Euclid network covers 28 European countries, listed on its site as: Austria, Albania, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, United Kingdom, Hungary, Ireland, Italy, Latvia, Lithuania, Luxemburg, North Macedonia, Montenegro, Netherlands, Norway, Poland, Portugal, Serbia, Slovakia, Slovenia, Spain, Sweden and Switzerland.

What the coverage actually means

Euclid describes itself as a collaboration among national lightning-detecting networks, providing lightning data for the European area with consistent quality in detection efficiency and location accuracy. In practice, that matters if you need lightning information that behaves the same way across borders — for example, a utility or insurer tracking storms that move from France into Germany, or a forecaster comparing activity in the Alps across Austria, Italy, Slovenia and Switzerland.

A practical next step

Before relying on it, match your area of interest against the list above and confirm with Euclid how it handles the edges of coverage: a storm near the boundary of a covered country may be detected differently than one in the centre. If your work spans the whole continent, note that the list is Europe-focused, so check whether your specific region is included rather than assuming full continental coverage.

How does Euclid compare to other lightning detection networks?

EUCLID is best understood as a collaboration of national lightning detection networks that combines their data into one pan-European picture. Its stated aim is to detect lightning across the whole European area with consistent quality — the same detection efficiency and location accuracy regardless of which country a strike occurs in.

That consistency is the main differentiator. Many national networks are optimised for their own territory, so coverage and accuracy can differ at borders. EUCLID's value is smoothing those seams: countries from Portugal, Ireland and the UK through Scandinavia to Italy and the Balkans are listed as participants.

How to compare networks in practice

• Coverage shape: EUCLID is explicitly Europe-wide. Global networks (for example, Blitzortung) cover more of the planet but with different regional performance.
• Consistency vs. peak accuracy: A single national network may tune its sensors for maximum accuracy over one country. EUCLID trades some of that local specialisation for uniform quality across borders.
• Data use case: If you need one homogeneous dataset for a storm that crosses France into Germany, a collaborative network is the natural fit. If you only need one country, a national operator may be simpler.

A concrete scenario: an insurance analyst assessing a hail-and-lightning event along the Rhine, or an aviation dispatcher tracking storms across several flight-information regions, benefits from a single quality standard rather than stitching national feeds together. A researcher studying global thunderstorm patterns would need a worldwide network instead.

Next step: define your geographic footprint and required location accuracy first. If your area crosses national borders within Europe, EUCLID's homogeneous quality is the criterion to weigh against any single-country provider.

What types of organizations use Euclid's lightning data?

EUCLID's lightning data is aimed at organizations that need consistent, wide-area lightning detection rather than a single-country feed. According to the network's own description, it is a collaboration among national lightning-detecting networks to identify and detect lightning across the European area, providing data with homogeneous quality in terms of detection efficiency and location accuracy.

That positioning points to several likely user groups:

• National meteorological and hydrological services — they need cross-border lightning information because storms do not stop at frontiers, and they often contribute to or coordinate with such networks.
• Weather forecasting and nowcasting providers — commercial and public forecasters can use real-time lightning to track convective storms, issue warnings and verify forecasts.
• Aviation, energy and utility operators — airports, grid operators and renewable-energy sites care about lightning near assets for safety, maintenance scheduling and outage response.
• Insurance and risk analysts — lightning strike data supports claims assessment, storm damage analysis and risk modelling.
• Research institutions — universities and climate or atmospheric science groups use long-term lightning records to study storm frequency and trends.
• Emergency management and civil protection agencies — they may use lightning activity to support severe-weather alerts and public safety decisions.

The practical trade-off is coverage versus granularity: a pan-European, quality-controlled network suits organizations that need a consistent view across many countries, while a local operator wanting very fine detail in one small area might rely on a denser national network. If your work spans multiple European countries and you need comparable data across borders, EUCLID's model is the relevant fit; check whether its real-time feed and historical coverage match your latency and record-length requirements.