Cyclone Xavier (2017)

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Cyclone Xavier
CycloneXavier2017.png
Aqua Modis satellite view of Xavier crossing Germany and Poland on 5 October 2017.
Type European windstorm
Formed4 October 2017
Dissipated6 October 2017
Highest gust202 km/h (126 mph), (Mountain value) Sněžka, Czech Republic [1]
Beaufort scale 10–12
Lowest pressure985 [2]   mb (29.09  inHg)
Fatalities9 (7 Germany, 2 Poland) [3]
Areas affected

Cyclone Xavier is a European windstorm which crossed northern Europe in early October 2017. Germany was the worst affected country, with high winds between 4 and 6 October causing severe damage, including in and around Berlin. Further damage was reported in the Czech Republic, where the highest winds of up to 125 miles per hour (201 km/h) were recorded, and in Poland.

Contents

Development

Coming from the North Atlantic Ocean, the depression travelled 3,000 kilometres (1,900 mi) within 24 hours. During the night of 4 October, Xavier moved across Great Britain towards the North Sea arriving at the border region between Denmark and Germany on 5 October late in the morning. Later on 5 October, the most powerful areas of the storm developed at the south-western flank of the depression's center. At noon, the storm had reached the northern German states of Lower Saxony and Schleswig-Holstein and swept across Saxony-Anhalt and the southern parts of Mecklenburg-Vorpommern in the afternoon. In the evening of 5 October, Xavier arrived in Brandenburg, Berlin, Thuringia and Saxony. For several hours, severe storm with wind speeds of 10 Beaufort, gust of 117 kilometres per hour (73 mph) and single gusts up to 12 Beaufort coming from West to Northwest were recorded there. The lowest pressure recorded in Germany was 985 hectopascals (985 mb; 29.1 inHg). [4] [2]

Storm Xavier reached hurricane strength at many locations. On the Brocken mountain in Germany, the wind speed reached 178 kilometres per hour (111 mph) while 120 kilometres per hour (75 mph) was recorded on Spiekeroog island in the North Sea. [5] On Mount Sněžka in the Czech Republic, a peak speed of 202 kilometres per hour (126 mph) was observed. [1]

Forecast and preparations

Forecast

In a preliminary notice on 4 October, the German Weather Service had announced a potential for storms with hurricane-like gusts and hurricane gusts on the next day from 10 a.m. through 6 p.m. in the North and from 2 through 10 p.m. in the East of Germany. This announcement was turned into a storm warning in the evening of 4 October. [4]

Preparations

The population in Germany was warned through the 'NINA' smartphone app published by the Federal Office of Civil Protection and Disaster Assistance. The Berlin fire brigade declared a state of emergency on 5 October while on the same day, the Hamburg fire brigade urged people not to stay outside during the storm. [6] [7]

Impact

Germany

Fallen trees in Berlin 2017 Xavier in Berlin. Spielvogel.jpg
Fallen trees in Berlin

In Berlin, Hamburg, Brandenburg und Mecklenburg-Vorpommern, seven people died due to the storm. In Berlin, journalist and author Sylke Tempel was killed by a falling tree, four persons died under similar circumstances in Brandenburg and one fatality occurred in Hamburg. [8] [6] [9] In the harbour town of Wilhelmshaven, the storm toppled a gantry crane that weighed c. 1,000 tonnes (2,200,000 lb). [10]

Numerous railway lines in Germany became impassable forcing rail traffic to be shut down. [11]

Poland

At least two people were killed and 39 sustained injuries. A man died in Lubusz Voivodeship by falling from a roof and in Greater Poland Voivodeship, a woman was killed by a falling branch. The storm primarily struck the South and West of the country. According to the Polish government's security centre, some 800,000 people were temporarily without electric power. 40,000 relief personnel were called to 10,000 situations across Poland. [12]

Czech Republic

In the Czech Republic, the fire services had to tend to several hundred calls. A regional train hit a tree on the tracks near Bělá (Semily District) and some railway lines had to be closed completely. [12]

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References

  1. 1 2 "Bilanz von 'Xavier': Böen bis 202 Kilometer pro Stunde". Meteo (in German). Schweizer Radio und Fernsehen. 6 October 2017. Retrieved 7 October 2017.
  2. 1 2 "Sturmtief XAVIER - der Tag danach" (in German). German Weather Service. 6 October 2017. Retrieved 7 October 2017.
  3. "Global Catastrophe Recap October 2017" (PDF). Aon. Archived from the original (PDF) on 15 November 2017. Retrieved 4 January 2018.
  4. 1 2 "Sturmtief Xavier und wie darüber vom DWD vorab informiert wurde" (in German). German Weather Service. 5 October 2017. Retrieved 6 October 2017.
  5. "Vielfach Orkanstärke: "Xavier" weht mit 137 km/h vor Berlin". N-TV (in German). 5 October 2017. Retrieved 6 October 2017.
  6. 1 2 "'Xavier': Mehrere Tote, Verkehrschaos und Rettungskräfte im Dauereinsatz". Süddeutsche Zeitung (in German). 6 October 2017. Retrieved 6 October 2017.
  7. "Berlin fire services call state of emergency, as hurricane-force winds hit capital". The Local . AFP. 5 October 2017. Retrieved 6 October 2017.
  8. "So trauern Politiker und Medien-Kollegen um Sylke Tempel". Hamburger Abendblatt (in German). 6 October 2017. Retrieved 6 October 2017.
  9. "Deadly storm Xavier sweeps across northern Germany". DW. Deutsche Welle. DPA, AFP. 5 October 2017. Retrieved 6 October 2017.
  10. "Sturmtief 'Xavier': Tonnenschwerer Hafenkran stürzt in die Jade". Spiegel Online (in German). DPA. 5 October 2017. Retrieved 6 October 2017.
  11. "Bahnchaos bis Anfang kommender Woche". Stuttgarter Nachrichten (in German). 6 October 2017. Retrieved 6 October 2017.
  12. 1 2 "Polen: Zwei Tote wegen Sturm 'Xavier'". Niederösterreichische Nachrichten (in German). 6 October 2017. Retrieved 6 October 2017.