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StormGeo is a global provider of advanced analytics and meteorological services delivering decision support for weather sensitive operations. Since its inception StormGeo has analyzed petabytes of data, transforming it into actionable decision guidance to help our customers manage risk and operations, control costs and increase revenue. The company has a leading position in solutions for shipping, offshore oil and gas, renewable energy and corporate enterprise business continuity. StormGeo has 23 worldwide offices of which 7 are 24/7/365 operation centers spanning all geographical areas of the world. StormGeo is a ISO-9001 certified company. For more information visit stormgeo.com or email info@stormgeo.com.

Extreme Weather IndexSite-specific thresholds for extremes

Extreme Weather Index

Extreme precipitation and wind can lead to severe damage, both to people and to expensive infrastructure. At StormGeo we use a vast number of weather forecast model simulations to compute the likelihood of extreme weather at any location of the globe.

What is extreme?In Bergen, Norway, it takes a lot of rain to make a downpour an extreme event. In drier regions, such as parts of Southern Europe, the same amount of rain would perhaps have devastating effects. There are of course also seasonal variations. This is why one has to calibrate any extreme weather index with respect to the location and the time of the year. To do this, 30-year climatologies are used define daily, site-specific thresholds for extremes; extreme wind, extreme temperatures and extreme precipitation.

PresentationThe figure below shows one possible visualization of extreme wind speed. The high values (red colours) indicate high probabilities of strong winds over the Mediterranean region in mid-April 2012. But as we have the source data on a geographical grid, there are endless ways to customize the presentation of the extreme weather index. Graphs, maps, charts; anything is possible.

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Surface: 10 metre speed indexWednesday 11 April 2012 00UTC ©ECMWF Extreme forecast index t+072-096 VT: Saturday 14 April 2012 00UTC - Sunday 15 April 2012 00UTC

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