science

Keraunos

Keraunos is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Keraunos rather than just read about it. In short: Keraunos, (sometimes written as KERAUNOS, in all caps) or the Tornadoes and Severe Storms French Observatory, is a French meteorological organization specializing in severe weather. It operates a free website that allows the public to access a considerable amount of information on these climatic phenomena thanks to real-time data, analytical articles, etc.

Key takeaways

Keraunos belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Keraunos to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Keraunos from memory before moving on to harder problems.

Reference excerpt

Keraunos, (sometimes written as KERAUNOS, in all caps) or the Tornadoes and Severe Storms French Observatory, is a French meteorological organization specializing in severe weather. It operates a free website that allows the public to access a considerable amount of information on these climatic phenomena thanks to real-time data, analytical articles, etc. It is also a consultancy firm that sells its expertise to companies and institutions that need forecasts or more detailed information.

History The company was founded in 2006 by two self-taught meteorologists, Pierre Mahieu and Emmanuel Wesolek, who felt that France lacked an organization specializing in the detection and study of thunderstorms. The owners of the Keraunos research office use the North American method of approaching this subject and have already published several articles in world-renowned meteorology journals. Keraunos became a simplified joint-stock company on September 6, 2010.

Mission Keraunos employs multidisciplinary experts, some with over 20 years of experience, in meteorology, climatology, hydrology, and risk management. Its activities include weather forecasting, weather warnings, and expertise for hail, tornadoes, lightning, severe gusts, and torrential rains. Keraunos provides the general public with free, high-quality information on storm events affecting the population, as well as a range of paid services for businesses and communities. Keraunos consultants frequently provide media input on both weather news and scientific documentaries on the subject.

Services Keraunos has its own autonomous forecasting center, specialized in the field of violent phenomena. It runs numerical weather prediction models at variable resolutions, up to 0.9 km, over France. Some models are deterministic and others probabilistic to increase the reliability of forecasts.

Website The free website offers:

real-time tracking of thunderstorm activity in France. forecasting of areas at risk for thunderstorm development. articles on recent news stories that have made headlines. a library of thunderstorm photos, including those taken by storm chasers. databases of thunderstorm events with "post-the-fact" analyses of historical tornado cases. articles on severe thunderstorms for public education. publications, including some published in scientific journals, analyzing cases of severe thunderstorms.

Consulting Services The services provided for a fee are tailored to meet each need in three areas:

specialized forecast bulletins for storms and related risks (hail, gusts, intense rain, etc.) requested by the user, ranging from short to long term. alerts for the user of the development of severe weather phenomena and post-occurrence reports. providing a proprietary database of hail, tornadoes, wind gusts, torrential rain, and other intense weather phenomena occurring in France to conduct expert assessments for clients and provide a climatology of weather risk exposure, municipality by municipality in France.

Other Activities Keraunos experts participate in various international conferences on severe thunderstorms. The organization also organizes seminars for enthusiasts, researchers, professionals, and storm chasers. Some publications by KERAUNOS members are:

Emmanuel Wesolek; Pierre Mahieu (Observatoire Français des Tornades et des Orages Violents) (June 2011). "The F4 tornado of August 3, 2008, in Northern France: Case study of a tornadic storm in a low CAPE environment". Atmospheric Research (5th European Conference on Severe Storms). 100 (4). Elsevier: 649–656. Bibcode:2011AtmRe.100..649W. doi:10.1016/j.atmosres.2010.09.003. Emmanuel Wesolek; Pierre Mahieu (Observatoire Français des Tornades et des Orages Violents) (October 2011). "Contribution to an European Adaptation of the Enhanced Fujita Scale : Analysis of Damage Caused by Tornadoes in France" (PDF). Atmospheric Research (6th European Conference On Severe Storms). Palma de Mallorca: Elsevier. C. Berthet; E. Wesolek; Dessensa; J.L. Sanchez (Observatoire Français des Tornades et des Orages Violents) (April 2013). "Extreme Hail Day Climatology in Southwestern France". Atmospheric Research. 123 (1). Elsevier: 139–150. Bibcode:2013AtmRe.123..139B. doi:10.1016/j.atmosres.2012.10.007. Thilo Kühne; Georg Pistotnik; Emmanuel Wesolek; Pierre Mahieu; Artur Surowiecki (June 2013). "Obstacles and barriers in research work on historical tornadoes in Central Europe". 7th European Conference on Severe Storms. doi:10.13140/2.1.1402.9605. Retrieved August 29, 2022.

References

Worked examples

Example 1 — a first encounter with Keraunos

Start with the simplest possible case. Write down what Keraunos claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Keraunos before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Keraunos ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Keraunos

In research: Keraunos appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Keraunos in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Keraunos is common in secondary-school and first-year university syllabi. It links to neighbouring topics Companies based in Hauts-de-France, French companies established in 2006, Meteorological companies, so understanding it makes those chapters shorter.
In everyday life: Look for Keraunos outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Keraunos in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Keraunos means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Keraunos out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Keraunos in simple terms?

Why does Keraunos matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Keraunos?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Keraunos.