Storm David

Last updated

David/Friederike
Storm David aka Friederike 18 Jan 2018.png
David on 18 January 2018, approximately centred above the Benelux or Western Germany
Type Extratropical cyclone, European windstorm, winter storm, blizzard
Formed16 January over Newfoundland
Duration17–19 January 2018 (as a storm)
(20–22 January as a weak low)
Dissipated22 January over Western Russia
Highest gust150 km/h (93 mph), Capel Curig, Wales [1] (alt 216 m [709 ft]) [2]

203 km/h (126 mph), Brocken, Saxony-Anhalt [3] (at altitude)
Lowest pressure974 hPa (28.8 inHg) [3]
Fatalities13 direct, 2 indirect [4]
Damage€1.14bn [5] [6] – 2.6bn [7]
Power outages471,000+ [8] [9]
Areas affected Ireland, UK, France, Benelux countries, Germany, Switzerland, Austria, Italy, Poland, Czech Republic, Slovakia, Belarus, Ukraine, Russia

Storm David (also called Cyclone Friederike in Germany) 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.

Contents

Meteorological history

On 14 January a weak low pressure area in the Southern Caribbean developed a trough to its northeast. [10] During the formation of the trough, weather in the North Atlantic was dominated by the strong Icelandic Low Fionn (called Evi by the Free University of Berlin) that itself brought windy conditions to Greenland, Iceland and Scotland and bottomed out at a very intense central low pressure of 935 hPa (27.6 inHg). [11] At that time, a very intense jet stream was prevalent in the North Atlantic, driven by the powerful arctic low. Thus, two of the main global weather prediction centres, GFS and ECMWF, predicted Fionn to steer the new cyclone into Europe, leading to an impact on the British Isles and Continental Europe. By that time, the track and intensity of the new storm were not clear. Likewise it was unclear if the new weather feature would affect Europe as a cyclone or if it would remain an open trough until it arrives.

By 16 January the trough now stretched from its Southern Caribbean origin to eastern Newfoundland. During that day, the trough developed a circulation centre near its northern end (Newfoundland), forming closed isobars around it [12] which indicate a closed wind circulation and qualify the system as an extratropical cyclone. Hours after formation, the storm was caught by Fionn's strong jetstream and started moving to the east, posing a threat to Europe. While crossing the Atlantic, David once again lost some structural definition and opened up into a trough under the strong influence of Fionn. [13] The weakened David was racing eastward through the North Atlantic, taking aim at the British Isles. Meanwhile, the ECMWF and GFS lowered their predictions concerning David's intensity as it was unclear if the system would be able to recover from the structural deterioration that was inflicted by Fionn. David would cross the North Atlantic in less than two days.

While David was approaching Ireland in the evening of 17 January, Fionn started to weaken as its centre began to fill. David managed to redevelop a closed circulation while passing over the British Isles and the North Sea in the morning of 18 January, worsening the risks for Central and Eastern Europe. [14] Britain received some hurricane-force gusts up to 150 km/h (93 mph). Subsequently, the storm had some hours to gain additional energy while moving quickly over the North Sea before making landfall in the Netherlands. The cyclone's minimal pressure bottomed out at 974 hPa (28.8 inHg) while centred over the North Sea, which was substantially lower than predicted by GFS and ECMWF. Vlieland, an island off the northern Dutch coast, where the storm made the first of its two landfalls in the Netherlands, experienced wind gusts up to 144 km/h (89 mph). Moving on, the winter storm rampaged in Germany, disrupting public transport services as it already did in the Benelux and causing ten deaths on 18 January. While centred over Germany, the storm still was near peak intensity, having a central pressure between 976 and 979 hPa (28.8 and 28.9 inHg), and caused widespread gusts in the 121–137 km/h (75–85 mph) range, with gusts up to 203 km/h (126 mph) on mountains. During the evening of 18 January, the eastward moving centre of David crossed the Polish border and weakened to 985 hPa (29.1 inHg). [15] David weakened to a regular low pressure area as its winds fell below storm force on 19 January. It continued its eastward motion through Belarus [16] and the westernmost part of Russia. [17] The southern flank of the low also affected the weather in Slovakia and Ukraine. On 22 January 2018, being located over western Russia, David merged with another weak low that was located over Scandinavia. Thus, David dissipated as a meteorological entity. [18]

Satellite loop of Friederike (David) airmass from EUMETSAT. FriederikeStorm.gif
Satellite loop of Friederike (David) airmass from EUMETSAT.

David was a compact and fast-moving cyclone, which is typical for systems that are steered by strong Icelandic lows which develop a strong easterly flow on their southern side. Similar to Fionn, David itself had its main wind field located to the south of its centre; the northern semicircle featured comparatively low winds but was more intense in terms of precipitation. Heavy snowfall occurred on the northern flank of the storm, [19] causing blizzard conditions in some areas.

Impact

Impacts of Cyclone David
CountryDeathsDamage (euros as of 2018)Power outagesRef
Ireland0UnknownUnknown
United Kingdom0Unknown140,000 [6]
France0Unknown11,000 [6]
Netherlands390 millionUnknown [20] [6]
Belgium150 millionUnknown [21] [22]
Luxembourg0UnknownUnknown
Germany8 (2)1 billion240,000 [23] [9] [24]
[5] [25]
Austria0UnknownUnknown
Switzerland0UnknownUnknown
Italy1UnknownUnknown [26]
Czech Republic0Unknown30,000 [27]
Poland0Unknown50,000 [28]
Total13 (2)1.14bn–2.6bn471,000

Beginning on 16 January, prior to David's arrival, the very deep and large arctic low Fionn battered the British isles with high winds. Storm conditions also occurred in other parts of Western and Central Europe in the middle of January 2018 (even affecting Corsica). The intense winds were caused by an extensive "squeeze in isobars" that, probably amongst other meteorological factors, was caused by Fionn's great depth and extension. During that time, David was crossing the Atlantic and fluctuated in intensity, leading some models to a rather optimistic forecast.

Nevertheless, David managed to begin a strengthening trend while crossing the British isles the night between 17 and 18 January. Thus, the fast-moving cyclone delivered winds up to 153 km/h (95 mph) and heavy snowfall in Britain, creating blizzard conditions there. [29] Windthrown trees blocked roads and rail routes. Approximately 140,000 households in Britain were temporarily without power.

The Netherlands were even worse affected by the cyclone. [30] All flights were cancelled at Amsterdam Airport Schiphol. The rail transportation system was also completely defunct due to windthrow. Because of thrown trees and high winds, road traffic was, as well, nearly impossible and life-threatening. Winds up to 140 km/h (87 mph) knocked down trucks and cost three people's lives in the Netherlands. In the neighbouring country of Belgium, similar conditions occurred, leading to the death of one woman. Furthermore, while the cyclone was centred over the Benelux, the northern French region of Hauts-de-France was lashed by winds up to 122 km/h (76 mph). [31]

Maximum gusts of Cyclone David [3] [32]
CountryLowland
(<200 m)		Upland
(200 – 500 m)		Highland or mountains
(>500 m)
highest gustalt
[m]		highest gustalt
[m]		highest gustalt
[m]
Ireland109 km/h (68 mph)
Shannon Airport 		14 [33] 93 km/h (58 mph) [a]
Knock Airport 		20300
United Kingdom134 km/h (83 mph)
Tibenham 		17|17 [34] 150 km/h (93 mph)
Capel Curig 		216 [35] 78 km/h (48 mph) [a] [c]
Great Dun Fell 		847
France136 km/h (85 mph)
Cap Gris-Nez 		30 [36] 00119 km/h (74 mph)
Embrun [37] 		817 [37]
Belgium119 km/h (74 mph)
Deurne, Antwerp 		12 [38] 93 km/h (58 mph) [a]
Marche-en-Famenne 		29496 km/h (60 mph) [a]
Mt. Rigi 		671
Netherlands144 km/h (89 mph)
Vlieland 		11 [39] 00no such elevationn.a.
Luxembourg81 km/h (50 mph) [a]
Wasserbillig 		13698 km/h (61 mph) [a]
Useldange 		280102 km/h (63 mph) [a]
Esch-sur-Sûre 		520
Germany146 km/h (91 mph)
Kabelsketal [40] 		126 [41] 144 km/h (89 mph)
Beverungen-Drenke [40] 		242 [42] 203 km/h (126 mph)
Brocken 		1153 [43]
Switzerlandno such elevation [b] n.a.96 km/h (60 mph) [a]
Steckborn 		398165|165 km/h (103 mph)
Pilatus [44] 		2132 [45]
Austria69 km/h (43 mph) [a]
Seibersdorf 		185104 mph (167 km/h) [a]
Linz Airport 		313148 mph (238 km/h) [a]
Feuerkogel		1618
Czech Republic93 km/h (58 mph) [a]
Doksany 		159107 km/h (66 mph) [a]
Ústí nad Labem 		379173 km/h (107 mph)
Sněžka 		1602 [46]
Poland93 km/h (58 mph) [a]
Wrocław 		124115 km/h (71 mph)
Bielsko-Biała 		365 [47] 126 km/h (78 mph)
Kasprowy Wierch 		1987 [48]
Slovakia0000137 km/h (85 mph) [a]
Chopok 		2012

Germany received the worst impacts by the cyclone that crossed the country on a track from Lower Saxony to Southern Brandenburg on 18 January. The main wind field on the southern side of the storm led to widespread gusts up to 133 km/h (83 mph) over a region ranging from North Rhine-Westphalia to Saxony. David featured wind gusts higher than 200 km/h (120 mph) on a few German mountains, reaching their maximum on the Brocken in Saxony-Anhalt (203 km/h [126 mph]). Simultaneously, the northern areas of Germany that were spared by the worst wind received heavy snowfall, especially the northeast. Deutsche Bahn, the country's main railroad company, halted most of its railroad transportation services since the ferocious winds and the subsequent windthrow made many railroad tracks impassable. [49] 100,000 power cuts in North Rhine-Westphalia and 140,000 in Eastern Germany are known to have occurred at some moment on 18 January. Similarly to the situation in the Netherlands, several flights were cancelled in Germany and road transportation was limited. The pilots who were arriving in Germany and the Netherlands had to perform crosswind landings in order to land their planes in the dangerous conditions, although luckily no aviation accidents are known to have occurred because of the storm. German emergency services received thousands of calls. Eight direct fatalities and numerous injuries were caused by David in Germany. Two indirect fatalities occurred in a traffic jam that was caused by the cyclone in Saxony. [24] Despite David's compact structure, the southern neighbor countries of Germany (Austria [50] and Switzerland [51] ) were affected by the high winds and intense snowfall of the cyclone as David's outer bands hit the Alps. Furthermore, the traffic of the Alpine countries was negatively affected by the nearly complete halt of rail and road traffic in Germany. Even Italy, where one man died, felt some effects of the storm. In Poland, the weakening system caused traffic disruptions and some infrastructural damage, causing 50,000 power outages. [28] The Czech Republic was inflicted some damage and power outages, too. Road and railroad traffic in Czech Republic was hampered too. In particular, some train lines that connected the Czech Republic to Germany were halted as Germany was the most affected country. [27] 30,000 power outages were registered in the Czech Republic.

As a preliminary total, 15 deaths (13 direct and 2 indirect) and 471,000 power outages are known to have occurred Europe-wide due to the effects of the storm. David/Friederike is estimated to have caused €1bn in damage in Germany alone, while the damage total in whole Europe could be as high as €2.6bn.

Reactions and naming controversy

Prior to the arrival on 17 January the cyclone received the names David by Météo France and Friederike by the Free University of Berlin. In contrast, the Met Office did not give the storm a name from its official naming list. [52] They did not expect the storm to affect the British Isles that is intense enough to justify the usage of a storm name. Only a few hours prior to David's impact, cyclone Fionn was dominating the interaction of the two lows, weakening David into a trough, making the struggling David seem relatively harmless. As David restrengthened just before making landfall on the British Isles and inflicting unexpectedly high damage, the Met Office became subject to criticism by the British public and media. Contrastingly, the DWD (German Meteorological Office) took David seriously and classified it a major windstorm (Orkan) [53] for its widespread hurricane-force (Bft. 12) gusts. In Germany, only exceptionally strong storms are given that title. Most storms in Germany are called Sturmtief (windstorm), a storm category which was assigned to Xavier and Herwart beforehand, two of 2017–18 season's most important storms in Germany. According to the DWD, David was the worst storm to affect central Germany since Kyrill. [54] As a precaution, many schools in Germany remained closed and entering many forests was forbidden on 18 January.

See also

Synoptic chart of Fionn (as a "squeeze in isobars") 16-17 January preceding David moving towards Ireland visible on the last two frames from KNMI Fyunn.gif
Synoptic chart of Fionn (as a "squeeze in isobars") 16–17 January preceding David moving towards Ireland visible on the last two frames from KNMI

Notes

  1. ^ Note a: These gust speeds have not been retrieved from official storm summary gust lists, but instead manually selected from source. [32] Higher gusts matching the specific criteria might have occurred since this website features an extensive, but incomplete set of weather stations. The altitudes of the weather stations that measured these wind speeds have been retrieved from the same source.
  2. ^ Note b: The lowest altitude in Switzerland is 193 m (633 ft). Since winds are usually measured 10 m (33 ft) above the surface, no officially valid wind speeds below an altitude of 200 m (660 ft) can be measured in this country.
  3. ^ Note c: The 78 km/h (48 mph) gust was registered on 17 January 2018 21:00, when David started to affect Great Britain. [56] [57] Just 13 hours earlier, a 133 km/h (83 mph) gust was registered at the same station, but, since David was racing east at a translational speed of up to 100 km/h (62 mph), cannot be attributed to David since David was well offshore at 08:00. [58] [59] Thus, it is probably more precise to attribute the 133 km/h gust to Cyclone Fionn since it dominated the weather in the North Atlantic just before David arrived.

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  25. ↑ "Bilanz nach Sturmtief "Friederike" - Sturm und bang". SPIEGEL ONLINE. 18 January 2018. Retrieved 19 January 2018.
  26. ↑ "Mehrere Tote durch Sturmtief "Friederike" in Europa". Salzburger Nachrichten. 18 January 2018. Retrieved 19 January 2018.
  27. 1 2 "Friederike: Sturmschäden in Tschechien vergleichsweise gering". Czech Radio. 19 January 2018. Retrieved 23 January 2018.
  28. 1 2 "Sturm "Friederike" kostet Versicherer etwa 500 Millionen Euro". SPIEGEL ONLINE. 18 January 2018. Retrieved 19 January 2018.
  29. ↑ "Met Office criticised for not naming storm which battered Britain as fresh weather warnings are issued". The Telegraph. 18 January 2018. Retrieved 19 January 2018.
  30. ↑ "Sturm "Friederike" verursacht Verkehrschaos in den Niederlanden". Wochenblatt. 18 January 2018. Archived from the original on 26 January 2018. Retrieved 19 January 2018.
  31. ↑ "La tempête David balaie le nord de l'Europe". le monde. 18 January 2018. Retrieved 19 January 2018.
  32. 1 2 "Aktuelle Messwerte Deutschland". kachelmannwetter.com. Retrieved 5 February 2018.
  33. ↑ "Long term weather forecast for Shannon Airport". www.yr.no. Retrieved 3 February 2018.
  34. ↑ "Tibenham, England (United Kingdom)". Archived from the original on 4 February 2018. Retrieved 21 July 2023.{{cite web}}: CS1 maint: unfit URL (link)
  35. ↑ "UK climate averages". www.metoffice.gov.uk. Retrieved 3 February 2018.
  36. ↑ "Weather Cap Gris-Nez". www.meteoblue.com. Retrieved 3 February 2018.
  37. 1 2 "Tempête DAVID ce Jeudi 18 Janvier" (in French). Archived from the original on 6 February 2018. Retrieved 21 August 2023.
  38. ↑ "Antwerpen/Deurne (Belgium) weather". www.metoffice.gov.uk. Retrieved 3 February 2018.
  39. ↑ "Vlieland (Netherlands) weather". www.metoffice.gov.uk. Retrieved 3 February 2018.
  40. 1 2 ""Friederike" ist durch". NTV. 19 January 2018. Retrieved 3 February 2018.
  41. ↑ "Wetterstation Kabelsketal - Messwerte". wetterstationen.meteomedia.de. Retrieved 3 February 2018.
  42. ↑ "Wetterstation Beverungen-Drenke - Messwerte". wetterstationen.meteomedia.de. Retrieved 3 February 2018.
  43. ↑ "Wetterstation Brocken - Messwerte". wetterstationen.meteomedia.de. Retrieved 3 February 2018.
  44. ↑ Jan Wandel; Christina Wisotzky; Florian Pantillon; Bernhard Mühr; Florian Becker; Daniel Friederich; Jonas Straub; Susanna Mohr (31 January 2018). "Wintersturm Friederike" (PDF). www.cedim.de (in German). Archived (PDF) from the original on 18 February 2022. Retrieved 20 July 2023.
  45. ↑ "Mount Pilatus Weather Forecast (2132m)". www.mountain-forecast.com. Retrieved 5 February 2018.
  46. ↑ "Snezka or Sněžka Weather Forecast (1602m)". www.mountain-forecast.com. Retrieved 3 February 2018.
  47. ↑ "Bielsko-Biała Weather Forecast". www.weather-forecast.com. Retrieved 3 February 2018.
  48. ↑ "Kasprowy Wierch Weather Forecast (1987m)". www.mountain-forecast.com. Retrieved 3 February 2018.
  49. ↑ "Sechs Todesopfer, 140.000 Haushalte ohne Strom". welt.de. 18 January 2018. Retrieved 19 January 2018.
  50. ↑ "Erste Fotos: Schneesturm erreicht jetzt Österreich". Heute Österreich. 18 January 2018. Retrieved 19 January 2018.
  51. ↑ "Sturm "Friederike" zieht Richtung Osten – Deutsche Bahn stellt in ganz Deutschland Fernverkehr ein, zehn Personen kommen ums Leben". Neue Zürcher Zeitung. 18 January 2018. Retrieved 19 January 2018.
  52. ↑ "Met Office criticised for not naming storm which battered Britain as fresh weather warnings are issued". The Telegraph. 18 January 2018. Retrieved 19 January 2018.
  53. ↑ "Sechs Todesopfer, 140.000 Haushalte ohne Strom". welt.de. 19 January 2018. Retrieved 19 January 2018.
  54. ↑ "Thema des Tages - Rückblick Sturmsaison 2017/2018". www.dwd.de (in German). Deutscher Wetterdienst. 22 September 2018. Retrieved 22 September 2018.
  55. ↑ Dutton, Liam (18 January 2018). "Why I criticised Met Eireann for naming Storm Fionn". Channel 4 News. Retrieved 24 January 2018.
  56. ↑ "18011718_UKMet_Analyse.gif" [Weather3 - current weather maps]. Wetter3 - aktuelle Wetterkarten (in German). 17 January 2018. Retrieved 17 May 2023.
  57. ↑ "18011800_UKMet_Analyse.gif" [Weather3 - current weather maps]. Wetter3- aktuelle Wetterkarten (in German). 18 January 2018. Retrieved 17 May 2023.
  58. ↑ "18011706_UKMet_Analyse.gif" [Weather3 - current weather maps]. Wetter3 - aktuelle Wetterkarten (in German). 17 January 2018.
  59. ↑ "18011712_UKMet_Analyse.gif" [Weather3- current weather maps]. Wetter3 - aktuelle Wetterkarten (in German). 17 January 2018. Retrieved 17 May 2023.
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