View source for Cyclone Gudrun

{{Short description|Powerful storm in northern Europe in 2005}}
{{Distinguish|text=the Eastern Pacific cyclone named [[Tropical Storm Irwin (disambiguation)|Irwin]]}}
{{EngvarB|date=June 2019}}
{{Use dmy dates|date=November 2023}}
{{Infobox weather event
|name=Cyclone Gudrun (Erwin)
|image=Erwin Jan 8 2005.png
|caption=Cyclone Gudrun in the [[North Sea]]
|formed=7&nbsp;January&nbsp;2005<ref>[http://www.met.fu-berlin.de/de/wetter/maps/Analyse_20050107.gif Wetter map] met.fu-berlin.de</ref>
|dissipated=12&nbsp;January&nbsp;2005<ref>[http://www.met.fu-berlin.de/de/wetter/maps/Analyse_20050112.gif Wetter map] met.fu-berlin.de</ref>
}}{{Infobox weather event/Extratropical
|pressure=960
}}{{Infobox weather event/Effects
|damages=£1.1 billion (2005 GBP)
|fatalities=12 (7 in [[Sweden]], 4 in [[Denmark]],1 in [[Estonia]])
|areas affected= [[United Kingdom]], [[Ireland]], [[Norway]], [[Denmark]], [[Sweden]], [[Latvia]], [[Estonia]]
}}{{Infobox weather event/Footer}}
'''Gudrun''' was a powerful storm which hit [[Denmark]] and [[Sweden]] on 8&nbsp;January&nbsp;2005, and [[Latvia]] and [[Estonia]] on 9&nbsp;January&nbsp;2005. The name '''Erwin''' was chosen by the [[Free University of Berlin]], while the storm was named '''Gudrun''' by the [[Norwegian Meteorological Institute]] and was the name used in [[Sweden]]. Sustained wind speeds of {{convert|126|km/h|abbr=on}} with wind gusts of {{convert|165|km/h|abbr=on}} were measured in [[Hanstholm]], [[Denmark]] – the same strength as a [[Saffir-Simpson Hurricane Scale|Category 1 hurricane]].

The storm caused significant financial damage in Sweden, where the forest industry suffered greatly from damaged trees, as more than {{convert|75|e6m3}} of trees were blown down in southern Sweden. This resulted in Sweden at the time having the world's largest surplus of lumber.

About 415,000 homes lost power in Sweden and several thousand of these were without power for many days and even weeks in some cases, as about 10,000 homes were still without power after three weeks.<ref>{{cite web|url=http://www.smhi.se/kunskapsbanken/meteorologi/gudrun-januaristormen-2005-1.5300|work=SMHI - Swedish Met Office|publisher=SMHI|access-date=7 December 2013|title=Gudrun - Januaristormen 2005}}</ref> The death toll in Sweden was 7<ref>{{cite web|url=http://www.smhi.se/kunskapsbanken/meteorologi/gudrun-januaristormen-2005-1.5300|work=SMHI - Swedish Met Office|publisher=SMHI|access-date=9 September 2017|title=Gudrun - Januaristormen 2005}}</ref> victims, making it one of the biggest environmental disasters in Swedish history, while four were killed in Denmark and one in Estonia.

==Meteorological history==
[[Image:Fallet träd i Onslunda, januari 2005.jpg|thumb|Fallen tree by [[Onslunda|Onslunda Church]] in [[Sweden]]]]
On 6 January 2005, a low pressure system developed at a frontal zone south of [[Newfoundland and Labrador|Newfoundland]].<ref name="life history">{{cite web|title=Life history of Depression ERWIN|url=http://www.met.fu-berlin.de/wetterpate/Lebensgeschichten/Tief_ERWIN_07_01_05.htm|archive-url=https://archive.today/20130105181659/http://www.met.fu-berlin.de/wetterpate/Lebensgeschichten/Tief_ERWIN_07_01_05.htm|url-status=dead|archive-date=5 January 2013|publisher=FU-Berlin|access-date=1 January 2012}}</ref> It moved into the central [[North Atlantic]] and was named 'Erwin' by the [[Free University of Berlin]].<ref name="life history"/> Erwin strengthened rapidly and its pressure at the time of naming was {{cvt|970|mb|inHg}}.<ref name="life history"/> Erwin moved quickly, and was already moving over [[Scotland]] and [[Northern Ireland]] on the 8th.<ref name="life history"/> In the UK, temperatures were noticeably higher after the passing of Erwin.<ref name="life history"/> On the 9th, Erwin had already moved into the [[Baltic Sea]] with a minimum central pressure of {{cvt|960|mb|inHg}}.<ref name="life history"/> Over much of Central and Western Europe, temperatures were very mild.<ref name="life history"/> The next day, weakening Erwin was over Western Russia with a pressure of {{cvt|975|mb|inHg}}.<ref name="life history"/> Erwin began slowing down as it moved into Central Russia. On 13 January, Erwin dissipated over Russia.<ref name="life history"/>

==Impact==
===Carlisle and Cumbria flooding===
In the UK, the main impacts of the storm were flooding in Cumbria and Carlisle, where 1,800 homes were flooded in the city.<ref>{{cite news |last1=Harper |first1=Mike |title=10 years on from the Cumbrian and Carlisle Floods of 2005 |url=https://environmentagency.blog.gov.uk/2015/01/08/10-years-on-from-the-cumbrian-and-carlisle-floods-of-2005/ |access-date=19 January 2016 |publisher=Environment Agency |date=8 January 2015}}</ref>

===Sweden blackout and damage to forests===
Gudrun is one of the strongest storms to impact Sweden in the last 100 years. It caused much damage to forests in [[Halland]] the southwestern part of the [[South Swedish highlands]] ([[Småland]]).<ref name=SMHIsmaland>{{cite web |title=Smålands klimat |url=https://www.smhi.se/kunskapsbanken/meteorologi/smalands-klimat-1.4865 |website=[[Swedish Meteorological and Hydrological Institute|SMHI]] |access-date=May 10, 2019 |language=sv |date=January 16, 2018}}</ref><ref name=SMHIGudrun>{{cite web |title=Skogsskador efter Gudrun |url=https://www.smhi.se/kunskapsbanken/meteorologi/skogsskador-efter-gudrun-1.5292 |website=[[Swedish Meteorological and Hydrological Institute|SMHI]] |access-date=May 10, 2019 |language=sv |date=July 8, 2015}}</ref> [[Picea abies|Spruces]] were particularly hit by Gudrun, while other trees with a more steady root system fared better.<ref name=SMHIGudrun/> Damage was also exacerbated by the practice of [[clearcutting]], leaving many trees exposed.<ref name=SMHIGudrun/> Gudrun also caused [[Power outage|blackouts]] and disabled telecommunications infrastructure.<ref name=SMHIsmaland/><ref name=SMHIGudrun/>

==Aftermath==
===Byholma Wood Stockpile===
The cyclone created the world's largest wood stockpile, which Gizmodo lists as containing {{convert|1|e6m3|cuft}} of wood as of May 2012. In Sweden, the total volume of wood from the trees struck down by the storm was about {{convert|75|e6m3|cuft}}.<ref>{{cite web|title=The World's Largest Wood Stockpile Is Absolutely Insane|url=https://gizmodo.com/byholma/|publisher=Gizmodo|access-date=14 May 2012|archive-date=16 May 2012|archive-url=https://web.archive.org/web/20120516010001/http://gizmodo.com/byholma/|url-status=dead}}</ref>

===Political impact in Sweden===
In her dissertation, "Natural Disasters and National Election", Lina M. Eriksson, found that the storm played a crucial role in the historic regime shift in the [[2006 Swedish general election]]. The incumbent [[Swedish Social Democratic Party|Social Democratic Party]]'s poor crisis response to Gudrun, hitherto the most expensive natural disaster in Swedish history, significantly contributed to the incumbent's loss.<ref name="linam">{{cite thesis|author=Eriksson, Lina M.|title=Natural Disasters and National Election: On the 2004 Indian Ocean Boxing Day Tsunami, the 2005 Storm Gudrun and the 2006 Historic Regime Shift|url=https://www.diva-portal.org/smash/record.jsf?pid=diva2%3A1071124&dswid=-6133|location=Uppsala University|degree=PhD|isbn=978-91-554-9813-9|year=2017}}</ref> In a subsequent article in [[Electoral Studies]],<ref>{{cite journal |last1=Eriksson |first1=Lina M. |year=2016 |title=Winds of Change: Voter Blame and Storm Gudrun in the 2006 Swedish Parliamentary Election |journal=Electoral Studies |volume=41 |pages=129–142 |doi=10.1016/j.electstud.2015.12.003}}</ref> it was observed that the deficient storm response still swayed voters in the [[2010 Swedish general election|2010]] and [[2014 Swedish general election|2014 elections]].<ref name="linam" />

==See also==
*[[Cyclone Anatol]]
*[[Cyclone Per]]
*[[European windstorm]]
*[[Sting jet]]

==References==
{{Reflist}}
*[https://web.archive.org/web/20051030170911/http://www.dmi.dk/dmi/danmark_ramt_af_landsdaekkende_storm Danish page with wind speeds and satellite image] - From the [[Danish Meteorological Institute]] (in Danish).
*[https://web.archive.org/web/20151222150600/http://www.dmi.dk/fileadmin/user_upload/2005-nyheder/8januarstormguycarprapport.pdf Guy Carpenter report on Windstorm Erwin / Gudrun – January 2005] - A report for the insurance business with detailed information about the storm.

==External links==
*[https://web.archive.org/web/20151222150600/http://www.dmi.dk/fileadmin/user_upload/2005-nyheder/8januarstormguycarprapport.pdf Windstorm Erwin / Gudrun – January 2005, Guy Carpenter]

{{European windstorms}}
{{Authority control}}

[[Category:European windstorms|Gudrun]]
[[Category:Weather events in Sweden|Gudrun]]
[[Category:Weather events in Denmark|Gudrun]]
[[Category:2005 in Denmark]]
[[Category:2005 in Sweden]]
[[Category:2005 meteorology]]
[[Category:2005 natural disasters]]
[[Category:January 2005 in Europe]]