Storm Herwart

from Wikipedia, the free encyclopedia
Herwart (Ingolf)
MODIS Terra satellite image of Europe from October 29, 2017 with the retreating center of Herwart over Belarus
MODIS Terra satellite image of Europe from October 29, 2017 with the retreating center of Herwart over Belarus
weather condition North Atlantic low
Wind force Heavy storm with hurricane gusts
Data
Beginning October 27, 2017
Climax October 29, 2017
Spitzbö (flat land) 144 km / h ( Fehmarn)
Spitzbö (mountainous region) 182 km / h ( Luční bouda)
consequences
affected areas North and Central Central Europe
Victim 10

The storm Herwart , in Poland often Polonized as Grzegorz , in Denmark and Sweden Ingolf , was a strong autumn storm with hurricane gusts that passed through Denmark , northern and eastern Germany , Poland and the Czech Republic and parts of Austria on October 29, 2017 . It caused a storm surge and beach erosion on both the North Sea and Baltic Sea coasts and led to widespread storm damage, traffic obstructions and power outages. At least nine people were killed by the effects of the storm. It is considered to be the second severe autumn storm of the year in Central Europe after the storm Xavier (October 4-6).

Meteorological overview

Nao.mrf.obs 1Nov2017.png
Strong North Atlantic Oscillation ( NAO Index ) October / November 2017: Ophelia 9. – 16. Oct. (hurricane off Ireland), and Elmar 18. – 20. Oct., Herwart 27.-29. Oct. and Numa 14.-18. Nov. (Medicane), always on the index cover

Storms usually occur in Central Europe in autumn and winter because the temperature differences between the polar regions and the temperate zone are higher than usual during the year. On average in the last third of October, the high pressure situations are replaced by cyclonic weather conditions, so that damaging storm situations are more frequent. Herwart was the first strong late October storm since hurricane Christian on October 28, 2013. Although this was largely a much stronger storm, Herwart's peak gusts are among the strongest peak gusts observed in October. In many places they were significantly higher than the values ​​observed two weeks earlier when Xavier passed through.

Structure of the wind field (KMNI analysis, October 28, 00 UTC)

In the run-up, a low moved Florence from the North Atlantic to the Baltic Sea region, which together with a high off Ireland (Vera) with a strong pressure gradient led to storms in Central Europe on Friday, October 27th. On October 27th, it was also predicted that on October 29th, storm Grischa , an aftershoot of Florence , would lie over the central Baltic Sea, but that low remained over northern Scandinavia.

In the cold front of Grischa on Saturday, October 28th, an unnamed Herwart forerunner formed, already in the night from Saturday to Sunday up to 140 km / h were measured in the flatlands in Austria ( Enns in Upper Austria), and up to 179 km / h on the Feuerkogel (Upper Austria) Sunday morning.

At the same time, a vortex formed off the coast of southern Norway, independently named Herwart , which, as a fast runner, relocated to northeast Poland until Sunday, October 29 at 10 a.m. The strongest gusts in northern Germany occurred along the cold front of Herwart. The cold front ran around 10 a.m. on a line from Karlsruhe to Passau and reached the Alps on the evening of October 29, where it caused heavy uphill rain . Denmark reported average mean winds of 24.5 m / s (88 km / h), with the highest value of 27.7 m / s (99.7 km / h) being measured on Rømø . The peak gusts reached widespread hurricane strength; the peak gust was registered at 38.6 m / s (139.0 km / h) in Kalundborg on the west coast of Zealand . The peak gusts in Germany were measured in the lowlands at 144 km / h on Fehmarn and at 140.8 km / h on Hiddensee , while the peak gusts in the mountains were registered there at 176 km / h on the Fichtelberg . In Austria, the afternoon peak values ​​were 138 km / h in Irdning and 132 km / h in Mariazell (both in Styria ), and 173 km / h on Sonnwendstein ( Lower Austria ). The strongest gust of wind was measured in the Czech Republic at 182 km / h on the Luční bouda .

These deep kernels already merged 29th to 30th to a harmless Eastern Europe low.

Effects

In contrast to the storm depression Xavier , which had passed mainly south of Schleswig-Holstein and the Baltic coast, Herwart affected southern Scandinavia and all of Central Central Europe.

Because of the extensive storm warnings, numerous events were canceled.

Storm surges in the North Sea and Baltic Sea

Glory Amsterdam on sandbar

Herwart caused a storm surge in the North Sea and Baltic Sea . The highest water levels on the North Sea southwest of the Elbe estuary with 2.60 m above sea level MHW in Bremerhaven and north of the Elbe with 2.06 m above sea level. MHW measured in Büsum ; at the Hamburg-St.-Pauli gauge , the flood reached 3.34 m above sea level. MHW values ​​of a severe storm surge. On the Baltic Sea, the storm first pushed water into the Skagerrak , then turned to a north-northwest direction and thus drove the water south into the Kattegat , where Zealand and Fyn dammed the water more intensely. A storm surge occurred on the corresponding coasts that would return for twenty years; on the north coast of Funen it was an event with a fifty-year return. In the Odense Fjord the tide reached a level of 168 cm above the Danish zero level (Dansk Vertical Reference 1990); little below the highest level measured there in November 2006 (174 cm). In Slipshavn near Nyborg on the west side of the Great Belt , 141 cm above zero were measured, which was the third highest water level there since measurements began in 1890 - the tide was only higher in November 2006 (177 cm) and in December 2013 (146 cm ). On the German Baltic coast, the water level reached 1.2 m above sea level. MHW.

Several ferry connections were interrupted in the North and Baltic Seas. Scandlines will stop traffic between Rostock and Gedser on Saturday for safety reasons, at DFDS Seaways all connections to and from Klaipėda were canceled on Sunday .

The 225 meter long freighter Glory Amsterdam ran aground off the island of Langeoog . Because of the fuel there was a danger to the Wadden Sea. He could only be towed free on November 2nd.

Denmark

A person died in the west of the Danish island of Zealand .

Germany

At least four people were killed in the storm in Germany.

As a precaution, Deutsche Bahn stopped long-distance traffic in seven federal states, at least partially. Local transport was also affected, particularly in Lower Saxony , Bremen and Hamburg . After it had already come to weather-related restrictions, the Metronom Eisenbahngesellschaft stopped its traffic on all routes after a train collided with a fallen tree near Stade on the Hamburg – Cuxhaven railway line . There were also temporary line closures at other railway companies. In the area around Bremerhaven the inland gewehte by the storm, salty air to lead arcing and short circuits in power grids. This also affected local passenger traffic on the Bremen – Bremerhaven railway line , where traffic was still interrupted several days after the storm. Several roads in Saxony and Upper Bavaria had to be closed due to windthrow. The Bremen Airport presented on Sunday evening an operation after a business jet had come off during the landing of the runway.

The storm surge washed away most of the beach on Wangerooge .

In Oldenswort ( North Friesland ) the storm tore off the roof and wings of the listed Catharina Mill . The historic Neuwerker north beacon was completely destroyed.

The autumn storm set a new German record for electricity generation from wind energy with around 39  gigawatts .

Poland

Two people were killed in Poland.

Czech Republic

Herwart caused the greatest damage in the Czech Republic since Hurricane Kyrill in 2007. Two people died.

The power supply was interrupted for hundreds of thousands of households. Trains no longer ran on numerous railway lines. In Most, the St. Valentin church was destroyed.

Austria

Storm damage in the Vienna Woods

The first storm damage occurred in Upper and Lower Austria on October 27th.

In Upper Austria, due to the storm warnings for the weekend and the two fatalities at a tent festival in August 2017, all events in tents were canceled as a precaution. In Austria, cemeteries and parks were also widely closed.

In Upper Austria alone , the fire brigade had around 1200 deployments. Up to 65,000 households were without electricity.

In Lower Austria , 250 fire brigades with 5,000 men were in action within 24 hours, something that has never been seen in this density. In large areas there were power outages due to damaged overhead lines. In Vienna , the platforms of the main train station had to be temporarily closed due to the falling facade parts of a neighboring building under construction, which led to disabilities in long-distance traffic. Many trains from the west were diverted to the Westbahnhof.

Damage and disabilities also occurred in Salzburg , Burgenland and Styria . For example, on October 29th, the Salzburg fire brigade had to deploy to 422 storms after a storm at Maria Alm from 152 km / h. 69 of the 119 communities were mainly affected by fallen trees

Web links

Commons : Sturmtief Herwart  - Collection of images, videos and audio files

supporting documents

  1. ↑ a b c Many long-distance rail routes are closed until Monday. In: Faz.net. October 29, 2017. Retrieved October 30, 2017 .
  2. ↑ a b c d Extrémně silná bouře má třetí oběť. Tisíce lidí jsou stále bez elektřiny (Czech) , Mladá fronta Dnes. Retrieved November 1, 2017. 
  3. ↑ The naming , which is formally valid only for Germany , was carried out by the Institute for Meteorology at the Free University of Berlin , as is usual for low and high pressure areas that affect Europe .
  4. ↑ Tomasz Ulanowski: Grzegorz czy Herwart? Skąd się biorą imiona orkanów? Każdy może zaadoptować we. Wystarczy zapłacić . In: wyborcza.pl , Gazeta Wyborcza, October 30, 2017. Accessed November 5, 2017. 
  5. ↑ a b Ingolf ended in class 1 on the danske stormliste ( Danish ) Danmarks Meteorologiske Institut. October 29, 2017. Retrieved October 30, 2017.
  6. ↑ a b c d e Susanne Haeseler, Christiana Lefebvre: Storm low HERWART provides on 28/29. October 2017 for hurricane gusts over Germany (PDF, 747 kb) German weather service. October 30, 2017. Retrieved October 31, 2017.
  7. ↑ Forecast for Fri. October 27, 2017, 12:00 UTC , DWD weather map, website of the Free University of Berlin;
    Weather situation as of October 27, 2017, 12 UTC. ZAMG Current weather map and map archive .
  8. ↑ a b forecast for Sat. October 28, 2017, 12:00 UTC , DWD weather map, website of the Free University of Berlin;
    Weather situation as of October 28, 2017, 12 UTC. ZAMG Current weather map and map archive .
  9. ↑ Weather situation from October 29, 2017, 00 UTC. ZAMG Current weather map and map archive .
  10. ↑ a b Sturm - Update 1 (as of 10:00 a.m.) and Sturm - Update 2 (as of 4:00 p.m.) . Central Institute for Meteorology and Geodynamics. October 29, 2017. Retrieved October 29, 2017.
  11. ↑ Forecast for Sat. October 29, 2017, 12:00 UTC , DWD weather map, website of the Free University of Berlin;
    Weather situation as of October 29, 2017, 12 UTC. ZAMG Current weather map and map archive .
  12. ↑ Christoph Hartmann: From "Grischa" to "Herwart" . In: Topic of the day . German Weather Service. October 29, 2017. Accessed October 31, 2017.
  13. ↑ Weather situation as of October 30, 2017, 00 UTC. ZAMG Current weather map and map archive .
  14. ↑ Emil Søndergård Ingvorsen: Stormrådet explainer stormflod flere steder i lands (Danish) ., DR 30 October 2010. Accessed 1 November 2010. 
  15. ↑ Anders Brandt: Ved Nyborg nåede man den næsthøjeste vandstand i 127 år. (Danish) , TV 2 Danmark. October 30, 2010. Retrieved November 1, 2010. 
  16. ↑ a b The weekend storm won't be as bad as "Xavier". In: zeit online, October 27, 2017.
  17. ↑ Frank Binder: Ferries are on their way again as planned. In: THB - Deutsche Schiffahrts-Zeitung , November 1, 2017.
  18. ↑ a b Freighter ran aground off Langeoog. In: Zeit Online. October 29, 2017. Retrieved October 30, 2017 .
  19. ↑ Ida Laursen Brock: Mand død efter ulykke på oversvømmet vej (Danish) , TV East. October 30, 2010. Retrieved October 31, 2017. 
  20. ↑ Friederike Liebscher, Wolfgang Böning: Storm surge: tragic misfortune in Sehestedt. In: Nordwest-Zeitung . October 30, 2017, accessed October 31, 2017 .
  21. ↑ After the storm: dead hunter under high seat . In: NDR , October 30, 2017, accessed October 30, 2017.
  22. ↑ a b c "Herwart": Death and Destruction in Europe. In: The press. October 29, 2017. Retrieved October 30, 2017 .
  23. ↑ The big cleanup after the storm. In: Stader Tageblatt . October 29, 2017. Retrieved October 30, 2017 .
  24. ↑ Storm stops train traffic: Hardly any trains to Bremen on the way. In: Kreiszeitung . October 29, 2017. Retrieved October 30, 2017 .
  25. ↑ Bernd Schlegel: Storm “Herwart”: The first InterCity Express trains are back in Göttingen. In: Hessische / Niedersächsische Allgemeine . October 29, 2017. Retrieved October 30, 2017 .
  26. ↑ Peter Hanuschke: Salt fog causes train cancellation between Bremen and Bremerhaven. In: Weser courier. November 1, 2017. Retrieved November 2, 2017 .
  27. ↑ Long-distance rail traffic will stand still until Monday - A8 closed. In: WeltN24 . October 29, 2017. Retrieved October 30, 2017 .
  28. ^ Christian Ahlers: Crash landing of small aircraft - all flights suspended. In: Nordwest-Zeitung . October 30, 2017. Retrieved October 30, 2017 .
  29. ↑ Destroyed beach on Wangerooge: A "huge disaster" as a tourist attraction. In: Nordwest-Zeitung . October 31, 2017, accessed October 31, 2017 .
  30. ↑ Storm low "Herwart" rages on SH. In: NDR. October 29, 2017. Retrieved October 30, 2017 .
  31. ↑ Storm claims fatalities - railway lines closed until Monday , Hamburger Abendblatt, October 29, 2017.
  32. ↑ Autumn storm Herwart sets new wind energy records. In: iwr.de. October 30, 2017. Retrieved October 30, 2017 .
  33. ↑ Storm in Upper Austria: tree falls on two cars. liferadio.at, October 27, 2017.
  34. ↑ Violent storm: tree falls on the tracks - trains stopped. heute.at, October 27, 2017.
  35. ↑ Festzelt-Nieder-Zwei-Tote.html Storm tears down the marquee - two dead . In: welt.de . August 19, 2017. Retrieved November 1, 2017.
  36. ↑ Sturm: Cemetery closed and festivals canceled. In: ORF Upper Austria. October 28, 2017. Retrieved October 30, 2017 .
  37. ↑ a b c A busy day for the fire brigade. In: ORF.at. October 29, 2017. Retrieved October 30, 2017 .
  38. ↑ Upper Austria: autumn storm on October 29, 2017 ensures numerous missions → 8,000 workers deployed. In: fireworld.at. Retrieved October 30, 2017 .
  39. ↑ 1.1 million euros in damage to electricity infrastructure from storm. In: Oberösterreichische Nachrichten online (nachrichten.at), November 2, 2017.
  40. ↑ Cleaning up after a storm. noe.ORF.at, October 30, 2017, accessed on November 2, 2017.
  41. ↑ There was a violent storm in Austria: fire brigades in constant use. In Tiroler Tageszeitung online (tt.com), October 29, 2017.
  42. ↑ 1,600 FIREFIGHTERS FIGHTING AGAINST STORM "HERWART" in Salzburg's Florian 07/2017 p. 6