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European windstorms are the strongest extratropical cyclones which occur across the continent of Europe.They form as cyclonic windstorms associated with areas of low atmospheric pressure. They are most common in the autumn and winter months. On average, the month when most windstorms form is January. The seasonal average is 4.6 windstorms. Deep low pressure areas are relatively common over the North Atlantic, sometimes starting as nor'easters off the New England coast, and frequently track across the North Atlantic Ocean towards western Europe, past the north coast of Great Britain and Ireland and into the Norwegian Sea. However, when they track further south, they can affect almost any country in Europe. Commonly affected countries include the United Kingdom, Ireland, the Netherlands, Norway, the Faroe Islands and Iceland, but any country in Central Europe, Northern Europe and especially Western Europe is occasionally struck by such a storm system.
Extratropical cyclones, sometimes called mid-latitude cyclones or wave cyclones, are low-pressure areas which, along with the anticyclones of high-pressure areas, drive the weather over much of the Earth. Extratropical cyclones are capable of producing anything from cloudiness and mild showers to heavy gales, thunderstorms, blizzards, and tornadoes. These types of cyclones are defined as large scale (synoptic) low pressure weather systems that occur in the middle latitudes of the Earth. In contrast with tropical cyclones, extratropical cyclones produce rapid changes in temperature and dew point along broad lines, called weather fronts, about the center of the cyclone.
Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west and the Mediterranean Sea to the south. It comprises the westernmost part of Eurasia.
In meteorology, a cyclone is a large scale air mass that rotates around a strong center of low atmospheric pressure. Cyclones are characterized by inward spiraling winds that rotate about a zone of low pressure. The largest low-pressure systems are polar vortices and extratropical cyclones of the largest scale. Warm-core cyclones such as tropical cyclones and subtropical cyclones also lie within the synoptic scale. Mesocyclones, tornadoes and dust devils lie within smaller mesoscale. Upper level cyclones can exist without the presence of a surface low, and can pinch off from the base of the tropical upper tropospheric trough during the summer months in the Northern Hemisphere. Cyclones have also been seen on extraterrestrial planets, such as Mars and Neptune. Cyclogenesis is the process of cyclone formation and intensification. Extratropical cyclones begin as waves in large regions of enhanced mid-latitude temperature contrasts called baroclinic zones. These zones contract and form weather fronts as the cyclonic circulation closes and intensifies. Later in their life cycle, extratropical cyclones occlude as cold air masses undercut the warmer air and become cold core systems. A cyclone's track is guided over the course of its 2 to 6 day life cycle by the steering flow of the subtropical jet stream.
The strong wind phenomena intrinsic to European windstorms, that give rise to "damage footprints" at the surface, can be placed into three categories, namely the "warm jet", the "cold jet", and the "sting jet". These phenomena vary in terms of physical mechanisms, atmospheric structure, spatial extent, duration, severity level, predictability, and location relative to cyclone and fronts.
On average, these storms cause economic damage of around €1.9 billion per year, and insurance losses of €1.4 billion per year (1990–1998). They rank as the second highest cause of global natural catastrophe insurance loss (after U.S. hurricanes).
A tropical cyclone is a rapidly rotating storm system characterized by a low-pressure center, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain. Depending on its location and strength, a tropical cyclone is referred to by different names, including hurricane, typhoon, tropical storm, cyclonic storm, tropical depression, and simply cyclone. A hurricane is a tropical cyclone that occurs in the Atlantic Ocean and northeastern Pacific Ocean, and a typhoon occurs in the northwestern Pacific Ocean; in the south Pacific or Indian Ocean, comparable storms are referred to simply as "tropical cyclones" or "severe cyclonic storms".
Up to the second half of the 19th century, European windstorms were named after the person who spotted them.[ citation needed ] Usually, they would be named either by the year, the date, the Saint's day of their occurrence or any other way that made them commonly known.
However, a storm may still be named differently in different countries. For instance, the Norwegian weather service also names independently notable storms that affect Norway,which can result in multiple names being used in different countries they affect, such as:
Norway, officially the Kingdom of Norway, is a Nordic country in Northern Europe whose territory comprises the western and northernmost portion of the Scandinavian Peninsula; the remote island of Jan Mayen and the archipelago of Svalbard are also part of the Kingdom of Norway. The Antarctic Peter I Island and the sub-Antarctic Bouvet Island are dependent territories and thus not considered part of the kingdom. Norway also lays claim to a section of Antarctica known as Queen Maud Land.
Anatol is the name given by the Free University of Berlin to a powerful winter storm that hit Denmark, Southwest Sweden, and Northern Germany on December 3, 1999. The storm had sustained winds of 146 km/h and wind gusts of up to 184 km/h, equivalent to an intense category 1 hurricane, which is unusually strong for storms in northern Europe. The storm caused 20 fatalities, and over 800 injuries in Denmark.
Cyclone Dagmar and as Cyclone Patrick by the Free University of Berlin) was a powerful European windstorm which swept over Norway on Christmas Day 2011, causing severe damage in central coastal areas, before continuing over the Scandinavian peninsula towards the Baltic Sea and Gulf of Finland. The storm caused $45 million in damage.
The St. Jude storm, also known as Cyclone Christian, and other names, was a severe Hurricane-force 12 European windstorm that hit Northwestern Europe on 27 and 28 October 2013 causing at least 17 deaths. The highest windspeed was in Denmark, where a gust of 120.8 mph (194.4 km/h) was recorded in the south of the country on the afternoon of 28 October, the strongest wind recorded in the country's history.
An alternative Scottish naming system arose in 2011 via social media/Twitter which resulted in the humorous naming of Hurricane Bawbagand Hurricane Fannybaws. Such usage of the term Hurricane is not without precedent, as the 1968 Scotland storm was referred to as "Hurricane Low Q".
The UK Met Office and Ireland's Met Éireann held discussions about developing a common naming system for Atlantic storms.In 2015 a pilot project by the two forecasters was launched as "Name our storms" which sought public participation in naming large-scale cyclonic windstorms affecting the UK and/or Ireland over the winter of 2015/16. The UK/Ireland storm naming system began its first operational season in 2017/2018. An independent forecaster, the European Windstorm Centre, also has its own naming list, although this is not an official list.
During 1954, Karla Wege, a student at the Free University of Berlin's meteorological institute suggested that names should be assigned to all areas of low and high pressure that influenced the weather of Central Europe.The university subsequently started to name every area of high or low pressure within its weather forecasts, from a list of 260 male and 260 female names submitted by its students. The female names were assigned to areas of low pressure while male names were assigned to areas of high pressure. The names were subsequently exclusively used by Berlin's media until February 1990, after which the German media started to commonly use the names, however, they were not officially approved by the German Meteorological Service Deutscher Wetterdienst. The DWD subsequently banned the usage of the names by their offices during July 1991, after complaints had poured in about the naming system. However, the order was leaked to the German press agency, Deutsche Presse-Agentur, who ran it as its lead weather story. Germany's ZDF television channel subsequently ran a phone in poll on 17 July 1991 and claimed that 72% of the 40,000 responses favored keeping the names. This made the DWD pause and think about the naming system and these days the DWD accept the naming system and request that it is maintained.
During 1998 a debate started about if it was discrimination to name areas of high pressure with male names and the areas of low pressure with female names.The issue was subsequently resolved by alternating male and female names each year. In November 2002 the "Adopt-a-Vortex" scheme began, which allows members of the public or companies to buy naming rights for a letter chosen by the buyer that are then assigned alphabetically to high and low pressure areas in Europe during each year. The naming comes with the slim chance that the system will be notable. The money raised by this is used by the meteorology department to maintain weather observations at the Free University.
Several European languages use cognates of the word huracán (ouragan, uragano, orkan, huragan, orkaan, ураган, which may or may not be differentiated from tropical hurricanes in these languages) to indicate particularly strong cyclonic winds occurring in Europe. The term hurricane as applied to these storms is not in reference to the structurally different tropical cyclone of the same name, but to the hurricane strength of the wind on the Beaufort scale (winds ≥ 118 km/h or ≥ 73 mph).
In English, use of term hurricane to refer to European windstorms is mostly discouraged, as these storms do not display the structure of tropical storms. Likewise the use of the French term ouragan is similarly discouraged as hurricane is in English, as it is typically reserved for tropical storms only.European windstorms in Latin Europe are generally referred to by derivatives of tempestas (tempest, tempête, tempestado, tempesta), meaning storm, weather, or season, from the Latin tempus, meaning time.
Globally storms of this type forming between 30° and 60° latitude are known as extratropical cyclones. The name European windstorm reflects that these storms in Europe are primarily notable for their strong winds and associated damage, which can span several nations on the continent. The strongest cyclones are called windstorms within academia and the insurance industry.The name European windstorm has not been adopted by the UK Met Office in broadcasts (though it is used in their academic research ), the media or by the general public, and appears to have gained currency in academic and insurance circles as a linguistic and terminologically neutral name for the phenomena.
In contrast to some other European nations there is a lack of a widely accepted name for these storms in English. The Met Office and UK media generally refer to these storms as severe gales. 70 mph (110 km/h) or more over inland areas. European windstorms are also described in forecasts variously as winter storms, winter lows, autumnal lows, Atlantic lows and cyclonic systems.[ citation needed ] They are also sometimes referred to as bullseye isobars and dartboard lows in reference to their appearance on weather charts.[ citation needed ] A Royal Society exhibition has used the name European cyclones, with North-Atlantic cyclone and North-Atlantic windstorms also being used. Though with the advent of the "Name our Storms" project, they are generally known as storms.The current definition of severe gales (which warrants the issue of a weather warning) are repeated gusts of
The state of the North Atlantic Oscillation relates strongly to the frequency, intensity, and tracks of European windstorms.An enhanced number of storms have been noted over the North Atlantic/European region during positive NAO phases (compared to negative NAO phases) and is due to larger areas of suitable growth conditions. The occurrence of extreme North Atlantic cyclones is aligned with the NAO state during the cyclones' development phase. The strongest storms are embedded within, and form in large scale atmospheric flow. It should be kept in mind that, on the other hand, the cyclones themselves play a major role in steering the NAO phase. Aggregate European windstorm losses show a strong dependence on NAO, with losses increasing/decreasing 10-15% at all return periods.
Temporal clustering of windstorm events has also been noted, with 8 consecutive storms hitting Europe during the winter of 1989/90. Lothar and Martin in 1999 were separated only by 36 hours. Kyrill in 2007 following only four days after Hanno, and 2008 with Johanna, Kirsten and Emma.In 2011, Xaver (Berit) moved across Northern Europe and just a day later another storm, named Yoda, hit the same area. In December the same year, Friedhelm, Hergen, Joachim and Oliver /Patrick (Cato/Dagmar) struck northern Europe.
Insurance losses from windstorms are the second greatest source of loss for any natural peril after Atlantic hurricanes in the United States.Windstorm losses exceed those caused by flooding in Europe. For instance one windstorm, Kyrill in 2007, exceeded the losses of the 2007 United Kingdom floods. On average, some 200,000 buildings are damaged by high winds in the UK every year.
European windstorms wipe out electrical generation capacity across large areas, making supplementation from abroad difficult (windturbines shut down to avoid damage and nuclear capacity may shut if cooling water is contaminated or flooding of the power plant occurs). Transmission capabilities can also be severely limited if power lines are brought down by snow, ice or high winds. In the wake of Cyclone Gudrun in 2005 Denmark and Latvia had difficulty importing electricity,and Sweden lost 25% of its total power capacity as the Ringhals Nuclear Power Plant and Barsebäck nuclear power plant nuclear plants were shut down.
During the Boxing Day Storm of 1998 the reactors at Hunterston B nuclear power station were shut down when power was lost, possibly due to arcing at pylons caused by salt spray from the sea.When the grid connection was restored, the generators that had powered the station during the blackout were shut down and left on "manual start", so when the power failed again the station was powered by batteries for a short time of around 30 minutes, until the diesel generators were started manually. During this period the reactors were left without forced cooling, in a similar fashion to the Fukushima Daiichi nuclear disaster, but the event at Hunterston was rated as International Nuclear Event Scale 2.
A year later in 1999 during the Lothar storm Flooding at the Blayais Nuclear Power Plant resulted in a "level 2" event on the International Nuclear Event Scale.Cyclone Lothar and Martin in 1999 left 3.4 million customers in France without electricity, and forced EdF to acquire all the available portable power generators in Europe, with some even being brought in from Canada. These storms brought a fourth of France's high-tension transmission lines down and 300 high-voltage transmission pylons were toppled. It was one of the greatest energy disruptions ever experienced by a modern developed country.
Following the Great Storm of 1987 the High Voltage Cross-Channel Link between the UK and France was interrupted, and the storm caused a domino-effect of power outages throughout the Southeast of England.Conversely windstorms can produce too much wind power. Cyclone Xynthia hit Europe in 2010, generating 19000 megawatts of electricity from Germany's 21000 wind turbines. The electricity produced was too much for consumers to use, and prices on the European Energy Exchange in Leipzig plummeted, which resulted in the grid operators having to pay over 18 euros per megawatt-hour to offload it, costing around half a million euros in total.
Disruption of the gas supply during Cyclone Dagmar in 2011 left Royal Dutch Shell's Ormen Lange gas processing plant in Norway inoperable after its electricity was cut off by the storm. This left gas supplies in the United Kingdom vulnerable as this facility can supply up to 20 percent of the United Kingdom's needs via the Langeled pipeline. However, the disruption came at a time of low demand.The same storm also saw the Leningrad Nuclear Power Plant also affected, as algae and mud stirred up by the storm were sucked into the cooling system, resulting in one of the generators being shut down. A similar situation was reported in the wake of Storm Angus in 2016 (though not linked specifically to the storm) when reactor 1 at Torness Nuclear Power Station in Scotland was taken offline after a sea water intake tripped due to excess seaweed around the inlet. Also following Storm Angus the UK's National Grid launched an investigation into whether a ship's anchor damaged four of the eight cables of the Cross Channel high voltage interconnector, which would leave it only able to operate at half of its capacity until February 2017.
The Burns' Day Storm was an extremely violent windstorm that took place on 25–26 January 1990 over north-western Europe. It is one of the strongest European windstorms on record. This storm has received different names as there is no official list of such events in Europe. Starting on the birthday of Scottish poet Robert Burns, it caused widespread damage and hurricane-force winds over a wide area. The storm was responsible for 47 deaths, although figures have ranged from 89 to over 100.
Lothar and Martin were violent European windstorms which swept across western and central Europe during a period of 36 hours in December 1999. The storms caused major damage in France, southern Germany, Switzerland, and Italy. Throughout the affected region, 140 people were killed and damage was estimated at €9.9 billion. Both of these storms were associated with an intense jet stream aloft and benefitted from latent heat release through atmosphere-ocean exchange processes. Lothar and Martin together left 3.4 million customers in France without electricity, and forced EdF to acquire all the available portable power generators in Europe, with some even being brought in from Canada. These storms brought down a quarter of France's high-tension transmission lines and 300 high-voltage transmission pylons were toppled. It was one of the greatest energy disruptions ever experienced by a modern developed country.
Tropical cyclones are ranked on one of five tropical cyclone intensity scales, according to their maximum sustained winds and which tropical cyclone basin(s) they are located in. Only a few scales of classifications are used officially by the meteorological agencies monitoring the tropical cyclones, but some alternative scales also exist, such as accumulated cyclone energy, the Power Dissipation Index, the Integrated Kinetic Energy Index, and the Hurricane Severity Index.
A superstorm is a large, unusually-occurring, destructive storm without another distinct meteorological classification, such as hurricane or blizzard. As the term is of recent coinage and lacks a formal definition, there is some debate as to its usefulness.
Severe weather refers to any dangerous meteorological phenomena with the potential to cause damage, serious social disruption, or loss of human life. Types of severe weather phenomena vary, depending on the latitude, altitude, topography, and atmospheric conditions. High winds, hail, excessive precipitation, and wildfires are forms and effects of severe weather, as are thunderstorms, downbursts, tornadoes, waterspouts, tropical cyclones, and extratropical cyclones. Regional and seasonal severe weather phenomena include blizzards (snowstorms), ice storms, and duststorms.
The following outline is provided as an overview of and topical guide to tropical cyclones:
Cyclone Friedhelm, also referred to unofficially as Hurricane Bawbag, was an intense extratropical cyclone which brought hurricane-force winds to Scotland at the beginning of December 2011. The storm also brought prolonged gales and rough seas to the rest of the British Isles, as well as parts of Scandinavia. On 8 December, winds reached up to 165 mph (265 km/h) at elevated areas, with sustained wind speeds of up to 80 mph (135 km/h) reported across populous areas. The winds uprooted trees and resulted in the closure of many roads, bridges, schools and businesses. Overall, the storm was the worst to affect Scotland in 10 years, though a stronger storm occurred less than a month afterwards, on 3 January 2012. Although the follow-up storm was more intense, the winter of 2011/12 is usually remembered for Bawbag among Scots.
Cyclone Hergen was an intense European windstorm that moved across Northern Europe during mid December 2011. It was first noted over the central North Atlantic Ocean by the Met Office. It then later reached peak intensity just northwest of Ireland and then crossed the north of Scotland hours later. It hung around the coast of Norway for the next week before being absorbed by another strong windstorm named Joachim.
Cyclone Ulli was an intense and deadly European windstorm. Forming on December 31, 2011 off the coast of New Jersey, Ulli began a rapid strengthening phase on January 2 as it sped across the Atlantic. In the late hours of January 1, Met Éireann issued a national severe weather warning for Connacht and Ulster and forecasters predicting winds speeds up to 87 mph with heavy driving rain. On January 2, the Met Office issued an amber weather warning for most of Scotland for heavy snow and strong winds. Forecasters predicted wind speeds up to 80 mph, and heavy rain, leading to localized flooding. Temperatures were expected to plummet from a record high of 12 °C (54 °F) recorded in southern England on New Year's Eve to 5 °C (41 °F). During the late hours of January 2, the European Storm Forecast Experiment (ESTOFEX) issued a Level Two warning for southeast England, the Netherlands, north Belgium, north Germany and Denmark. Ulli was the costliest disaster in January 2012 globally. The damage from the storm in Glasgow was also compared to a storm in 1968.
Cyclone Andrea was an intense European windstorm that affected western and central Europe in early January 2012.
The Gale of January 1976, widely known as the "Capella" storm in Germany and the Ruisbroek flood in Belgium, was one in a series of extratropical cyclones and storm surges, which occurred over January 1976. The gale of 2–5 January resulted in severe wind damage across western and central Europe and coastal flooding around the southern North Sea coasts. At the time, this was the most severe storm of the century to date over the British Isles. Total fatalities reached 82 across Europe, although a figure of 100 is given by the World Meteorological Organization. Of these 24 were reported in Britain and 4 in Ireland. Overall losses of US$1,300 million were incurred, with insured losses standing at US$500 million (1976).
The effects of tropical cyclones in Europe and their extra-tropical remnants include strong winds, heavy rainfall, and in rare instances, tornadoes. There is only one modern tropical cyclone officially regarded as directly impacting Europe—Hurricane Vince in 2005, which struck southwestern Spain—having made landfall in the European mainland while still fully tropical. Hurricane Debbie in 1961 might have still been tropical when it made landfall in northwestern Ireland, but this is disputed.
The 2017–18 European windstorm season, or the 2017–18 UK and Ireland windstorm season was the third instance of the United Kingdom's Met Office and Ireland's Met Éireann naming of high impact extratropical cyclones and the first instance of Spanish, Portuguese and French naming as well. This season was also the deadliest windstorm season for the UK and Ireland since official naming began in 2015. In addition, a major amount of the season's damage was due to two of its storms – Emma and Ophelia and the "Beast from the East" cold wave. The first system, Storm Aileen, formed on 12 September. The season also featured Hurricane Ophelia, which impacted the Azores, Portugal and Spain, before it transitioned into an extratropical cyclone and impacted the United Kingdom and Ireland. Storm Brian struck Ireland less than a week later, resulting in three further fatalities.
Cyclone Egon was a European windstorm that affected the north of France, Belgium and Germany during the night of Thursday 12 to Friday 13 January 2017. It caused three deaths, widespread power outages, and wind damage and significant snowfall, primarily France and Germany, but also in the Benelux states, Austria and Switzerland.
Cyclone Friederike was a compact but deadly European windstorm that heavily affected the British Isles, France, Benelux, Central Europe, Northern Italy, Poland and parts of Eastern Europe in early 2018 with widespread hurricane-force gusts and severe snowfall, creating blizzard conditions in some areas. The storm caused extensive damage and traffic disruption. It was given the name David by Météo France while the FUB named it Friederike.
The 2018–19 European windstorm season is the fourth instance of seasonal European windstorm naming in Europe. Most storms form between September and March. The first named storm, Ali affected primarily the United Kingdom and Ireland on the 19 September.
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