Cyclone Dagmar Explained

Cyclone Dagmar
Image Location:Storm Dagmar IR 26 December 2011.png
Image Name:Storm Dagmar over Scandinavia 26 December 2011
Stormtype:European windstorm, Extratropical cyclone
Date Formed:24 December 2011
Date Dissipated:27 December 2011
Total Damages (Usd):$45 million (2011 USD)
Total Fatalities:2
Areas Affected:Norway, Sweden, Finland, Estonia, Russia

Cyclone Dagmar[1] (also referred to as Cyclone Tapani in Finland[2]) 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 (2011 USD) in damage.[3]

Meteorological history

Patrick formed as a small low just south of Newfoundland on 24 December.[4] The system raced across the north Atlantic, deepening rapidly to 956mb by Christmas Day.[5] [6] Patricks extraordinary windspeed was due to it being a secondary low to the deep cyclone Oliver to the north and the powerful high Cora to the south, enhancing the southwesterly winds on the south side of the low.[7] On 26 December, Patrick made landfall in western Norway with a central pressure of 964mb.[8] [9] The storm continued to move eastwards at a rapid pace, however, as it was overland it had weakened significantly.[10] It hit Finland the same day, St. Stephen's Day (Tapani in Finnish), and got the Finnish name due to that day. It then moved out of the Free University of Berlin's tracking charts the next day.[11]

Impact

Norway

Patrick (Dagmar) arrived in Norway as a southwesterly storm, with windspeeds estimated to be on average on the coast. Up to 10 minute sustained winds was measured at Kråkenes Lighthouse, Sogn og Fjordane, before the anemometer broke. Powerful winds occurred in Sogn og Fjordane, Møre og Romsdal and Trøndelag during the night of 24 December and early morning of 25 December. Extreme high storm surge in Finnmark estimated to be over normal sea levels, although this was due to the preceding storm Cato (Oliver). In Norway comparison was made with the New Year's Day Storm of 1992, however this storm was not as strong[12] Patrick (Dagmar) is believed to be the third strongest storm to hit Norway in 50 years.[13] [14] [15] A large landslide on 1 January 2012 close to the Norwegian city of Trondheim has been attributed to the warm weather and large amounts of rain the system brought to the area, which resulted in 50 people being evacuated.[16] [17] The pier area of Trondheim was badly damaged during the storm, heavily damaging the façade of the Pirbadet water park.[18] A F2 tornado was reported in Hellesylt, Norway. The Tanker BW Thames was disabled and adrift northwest of Bergen as the storm approached, however the crew were able to regain power and survived the storm without incident.[19] The Russian trawler Krasnoselsk sank in Hundeidvika harbour, Sykkylven, Norway.[20] [21] Dagmar knocked out 390 Telenor communication masts leaving 40,000 customers without mobile or landline telephone connections.[22] Royal Dutch Shell's Ormen Lange gas processing plant was inoperable after its electricity was cut off by the storm, which left gas supplies in the UK vulnerable as this facility can supply up to 20 percent of the UK's supply via the Langeled pipeline.[23]

Sweden

Storm Dagmar mostly affected Southern Norrland and northern Svealand.[24] The Swedish transport authority suspended all train traffic north of Gävle at 20:00 on Christmas Day in preparation.[25] Many trees fell in the storm, bringing down power lines and blocking roads and railways. Approximately 170,000 households were left without power between Uppland and Västerbotten, some for several days. Train traffic came to a standstill in Norrland, however the principal north–south route of the country (European route E4) was quickly cleared.[24] Several weather stations in the Norrland interior experienced their strongest wind gusts in 15 years.[24] Winds of 41m/s were recorded on the pylons of the Höga Kusten Bridge.[26] 1.2 million Swedish Kronor of damage was caused in Ljusdal when sixteen rail wagons weighing 313t were blown along the railway for until they derailed on a road intersection.[27] Some 40,000 homes were still without power around 14:00 on 27 December.[28]

Finland

Patrick (Tapani) was dubbed the worst storm in Finland in 10 years.[29] Thousands of customers were left without electricity in Southern Finland.[30] The storm was a rare event in Finland and gave the warmest Christmas period in half a century.[31] An old man is reported to have died after being hit by a falling tree.[32] [33]

Estonia

Patrick left 100,000 homes without power in Estonia, and triggered 600 rescue operations. Eesti Energia reassigned its customer services personnel to answer emergency calls.[34] Patrick also brought record high temperatures to the country for December.[35] [36] Flooding was reported in the streets of major cities.[37]

Russia

The Saint Petersburg Dam gates were closed to protect the city, preventing 15 ships from entering the port. The storm tore metal sheeting from roofs and many trees were brought down.[38] Leningrad Nuclear Power Plant was 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.[39] [40]

Aftermath

Deutsche Bank estimated that the price of wood could fall by up to 15%.[41]

See also

External links

Notes and References

  1. Web site: Norske ekstremvær får navn. Norwegian Meteorological Institute. 4 January 2012. no. https://web.archive.org/web/20150927143449/http://met.no/Meteorologi/A_varsle_varet/Varsling_av_farlig_var/Norske_ekstremvar_far_navn/Norske+ekstremv%C3%A6r+f%C3%A5r+navn.9UFRjO2L.ips. 27 September 2015. dead.
  2. Web site: På annandag jul drar årets värsta storm över landet. hbl.fi. 30 January 2012. sv. 11 January 2012. https://web.archive.org/web/20120111181404/http://hbl.fi/nyheter/2011-12-25/pa-annandagen-kommer-stormen-0. dead.
  3. News: Claims from Windstorm Dagmar in Scandinavia to break $46m. 11 January 2012. Insurance Insight. 3 January 2012.
  4. Web site: December 24, 2011 surface analysis. Meteorological Institute. Free University of Berlin. 7 February 2012. 6 October 2013. https://web.archive.org/web/20131006031259/http://www.met.fu-berlin.de/de/wetter/maps/Analyse_20111224.gif. dead.
  5. Web site: December 25, 2011 surface analysis. Meteorological Institute. Free University of Berlin. 7 February 2012. 6 October 2013. https://web.archive.org/web/20131006045424/http://www.met.fu-berlin.de/de/wetter/maps/Analyse_20111225.gif. dead.
  6. Web site: December 25, 2011 surface analysis. Met Office. 7 February 2012.
  7. Web site: Image. wetterzentrale.de.
  8. Web site: December 26, 2011 surface analysis. Meteorological Institute. Free University of Berlin. 7 February 2012. 13 August 2014. https://web.archive.org/web/20140813114726/http://www.met.fu-berlin.de/de/wetter/maps/Analyse_20111226.gif. dead.
  9. Web site: December 26, 2011 surface analysis. Met Office. 7 February 2012.
  10. Web site: December 27, 2011 surface analysis. Meteorological Institute. Free University of Berlin. 7 February 2012. 13 August 2014. https://web.archive.org/web/20140813120756/http://www.met.fu-berlin.de/de/wetter/maps/Analyse_20111227.gif. dead.
  11. Web site: December 28, 2011 surface analysis. Meteorological Institute. Free University of Berlin. 7 February 2012. 13 August 2014. https://web.archive.org/web/20140813115333/http://www.met.fu-berlin.de/de/wetter/maps/Analyse_20111228.gif. dead.
  12. Web site: Sterk orkan- men kraftigare i 1992. 26 December 2011 . 4 January 2012. no.
  13. Web site: Dagmar could be third worst Norwegian storm of last 50 years. insuranceinsider.com. 4 January 2012. 26 May 2012. https://web.archive.org/web/20120526215055/http://www.insuranceinsider.com/dagmar-could-be-third-worst-norwegian-storm-of-last-50-years. dead.
  14. Web site: Record recent storms in Norway cut off several villages and left over 100,000 without electricity.. theforeigner.no. 4 January 2012. https://web.archive.org/web/20120103111655/http://theforeigner.no/pages/news/norway-storms-isolate-thousands/. 3 January 2012. dead.
  15. Web site: Norway storms isolate thousands. theforeigner.no. 4 January 2012. https://web.archive.org/web/20120103111655/http://theforeigner.no/pages/news/norway-storms-isolate-thousands/. 3 January 2012. dead.
  16. Web site: Evacuees returning after massive landslide. thelocal.no. 4 January 2012.
  17. Web site: Residents on alert following Norway landslides. http://wayback.vefsafn.is/wayback/20130403100217/http://icelandpulse.com/icenews/6834%2Dresidents%2Don%2Dalert%2Dfollowing%2Dnorway%2Dlandslides. dead. 3 April 2013. icelandpulse.com. 9 February 2012.
  18. Web site: Dagmars herjinger. https://archive.today/20120912205438/http://www.tih.no/nyhet/dagmars-herjinger-780.aspx. dead. 12 September 2012. Trondheim Havn. 20 March 2012. no.
  19. Web site: Product tanker BW Thames nearly fell a victim to raging Dagmar storm. Maritime Bulletin. 29 February 2012. 4 March 2016. https://web.archive.org/web/20160304050828/http://www.odin.tc/news/read.asp?articleID=360. dead.
  20. Web site: Storm Dagmar sank Russian trawler. Maritime Bulletin. 29 February 2012. 4 March 2016. https://web.archive.org/web/20160304093330/http://www.odin.tc/news/read.asp?articleID=361. dead.
  21. Web site: Krasnoselsk. 25 December 2011 . shipwrecklog.com. 29 February 2012.
  22. Web site: Patient died in Norway storm. theforeigner.no. 29 February 2012. https://web.archive.org/web/20120131044546/http://theforeigner.no/pages/news/patient-died-in-norway-storm/. 31 January 2012. dead.
  23. News: UK gas supplies choppy after North Sea storm. 27 December 2011 . Reuters. 17 May 2012.
  24. Web site: December 2011 – Var händelserik med värme, åska och stormar. SMHI. 20 March 2012. sv. https://web.archive.org/web/20120305194114/http://www.smhi.se/klimatdata/Manadens-vader-och-vatten/Sverige/Manadens-vader-i-Sverige/december-2011-var-handelserik-med-varme-aska-och-stormar-1.19067. 5 March 2012. dead.
  25. News: Christmas storm causes problems for thousands. Sveriges Radio . 26 December 2011 . sr.se. 4 January 2012.
  26. News: Stormen orsakar stora problem på många håll. Sveriges Radio. 26 December 2011 . 20 March 2012. sv.
  27. Web site: Säkringen höll inte för Dagmar. Ljusdals-Posten. 29 February 2012. sv.
  28. Web site: Sweden struggles with wrath of storm Dagmar. thelocal.se. 4 January 2012.
  29. Web site: Värsta stormen på tio år. HBL.fi. 4 January 2012. sv.
  30. Web site: Stormen drar över Nyland. HBL.fi. 4 January 2012. sv. 9 January 2012. https://web.archive.org/web/20120109145138/http://hbl.fi/nyheter/2011-12-26/stormen-drar-over-vastkusten-tiotusentals-hushall-utan-el. dead.
  31. Web site: Storm on St Stephen's Day was rare. Finnish Meteorological Institute. 4 January 2012.
  32. Web site: Cyclone Patrick hits St. Petersburg. https://archive.today/20130417191207/http://english.ruvr.ru/2011/12/27/62956176.html. dead. 17 April 2013. ruvr.ru. 4 January 2012.
  33. Web site: Nordisk orkan koster liv i Finland. https://archive.today/20120714161625/http://jp.dk/udland/europa/article2647116.ece. dead. 14 July 2012. jp.dk. 14 February 2012. da.
  34. Web site: Storm puts Estonian emergency capacity on the brink. balticbusinessnews.com. 4 January 2012. 3 January 2012. https://web.archive.org/web/20120103111238/http://balticbusinessnews.com/article/2011/12/28/storm-puts-estonian-emergency-capacity-on-the-brink. dead.
  35. Web site: Patrick Brings Record High Temperatures, Downed Power Lines. 27 December 2011 . err.ee. 4 January 2012.
  36. Web site: December 27 Temperature Exceeds Record by Half. 27 December 2011 . err.ee. 4 January 2012.
  37. Web site: Eesti Energia: storm in December caused more damages than last year's Monika. baltic-course.com. 4 January 2012.
  38. Web site: Elements go wild in St. Petersburg. https://archive.today/20120712184411/http://english.ruvr.ru/2011/12/28/63060060.html. dead. 12 July 2012. ruvr.ru. 4 January 2012.
  39. Web site: Myrsky sulki generaattorin venäläisvoimalassa. 28 December 2011 . yle.fi. 14 February 2012. fi.
  40. Web site: Generator stängd vid Sosnovij Bor. hbl.fi. 14 February 2012. sv. 8 December 2015. https://web.archive.org/web/20151208042812/http://hbl.fi/nyheter/2011-12-28/generator-stangd-vid-sosnovij-bor. dead.
  41. Web site: Stormen Dagmar guld för skogsbolag. affarsvarlden.se. 29 February 2012. sv. 10 January 2012. https://web.archive.org/web/20120110152115/http://www.affarsvarlden.se/hem/nyheter/article3377873.ece. dead.

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