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24 julio 2014 4 24 /07 /julio /2014 18:40

 

Lightning over western Europe 9 June 2014

 

 The Spanish Plume (Penacho Ibérico in Spanish and Spaanse Pluim in Dutch) is a weather pattern in which a plume of warm air moves from the Iberian plateau or the Sahara to northwest Europe giving rise to severe storms. This meteorological pattern can lead to extreme high temperatures and intense rainfall during the summer months, with potential for flash flooding, damaging hail storms and tornado formation.

 

 

map from Lightningmaps.org with data from Blitzortung.org and its participants - http://www.lightningmaps.o


La noche de los 17.000 rayos

El "penacho ibérico", ese fenómeno atmosférico que crea corriente de aire caliente y provoca temperaturas insólitamente altas para las islas británicas (por encima de los treinta grados), ha sido también el responsable de la mayor descarga natural de electricidad estática de las últimas décadas.

20/07/2014 - elmundo.es -

Hasta 17.000 rayos sacudieron en los cielos de Gran Bretaña en un noche de furia inusitada, la del 18 de julio. Según la Met Office, se trata posiblemente de la mayor descarga natural de las últimas décadas en todo el país.

Las fotos impactantes del Cannary Wharf de Londres, del Old West Pier de Brighton o del Monter St. Michael en Cornualles dan testimonio de la noche de rayos y truenos que tendrá seguramente continuación esta semana con altas presiones y la humedad asfixiantes instalada sobre las islas.
 

La Met Office ha advertido del peligro extremo de las tormentas, con más de 50 alertas por inundación en el este y en el sur del país. El transporte aéreo y la circulación de trenes se han visto seriamente afectados, con el 20% de los vuelos cancelados y grandes retrasos en el aeropuerto de Heathrow y el cierre temporal de la línea ferroviarias entre la capital británica y Bath, donde tuvo que ser evacuado el hospital Royal United por un derrumbamiento.

Las inundaciones causadas por auténticas tormentas "tropicales" han obligado también a cerrar carreteras en Gloucestershire y en Kent y en los West Midlands. Tan sólo Escocia se ha librado de momento de los temporales, aunque el "penacho ibérico" está subiendo hacia el norte y parece que está aquí para quedarse. Según la Met Office, hay un 60% de posibilidades de que la ola de calor y las lluvias torrenciales se extiendan durante la próxima semana.

 

 

 Notable Occurrences

 

  • 1897, 24 July saw thunderstorms disrupt the celebrations of Queen Victoria's Diamond Jubilee.[1]
  • 1955, 18 July a Spanish Plume brought a record amount of rain on one day to Martinstown Dorset, with slow-moving thunderstorms bringing 279mm of rainfall.[2] A record which stood for over 50 years until the 2009 Cumbria floods.[3]
  • 1958, 5 September Horsham storm, heaviest hailstone recorded in the UK (190g).[4]
  • 1959, 9 July Wokingham storm.[4] the first in the world to be identified as a supercell.[5]
  • 1961, 12 August synoptic set-up of a Spanish Plume, however dry ground conditions in France led to little evaporation which led to lack of moisture in the air to fuel cloud and storm formation.[4]
  • 1968, 10 July Great Flood of 1968[6] Chew Stoke floods and Pforzheim tornado in Germany.[7]
  • 1975, 14 July. Hailstorm in the Midlands.[8][9]
  • 1985, 26 May East Anglia.[10]
Lightning over western Europe 9 June 2014
  • 1992, 20–21 July Severe thunderstorms over south-east England.[11]
  • 1994, 24 June, Severe storms move from northern France and across south-eastern England.[12]
  • 1995, 9 September A tornado was generated in the Rhine Valley, Germany.[7]
  • 1996, 7 June damaging hail storms across England from Lyme Bay to the Wash.[13]
  • 2011, 18 August a severe storm battered the Pukkelpop festival in Belgium. This situation shows some similarities with the Spanish Plume.[14]
  • 2012, 10 May high temperatures reported in south of England with a tornado in Belgium reaching 100 mph gusts in Ghent.[15][16]
  • 2012, 28 June supercells in UK and Belgium,[17][18] disrupted the 2012 Summer Olympics torch relay and brought chaos to North East England.[9][19][20]
  • 2013, 26–27 July A Mesoscale convective system developed in France and moved across the Netherlands and northern Germany, a gust of 102 mph was recorded at Pauillac, France from the storm. Smaller scale thunderstorms developed in the UK.[21]
  • 2014, 7–11 June Pentecost weekend storms in Europe brought disruptive conditions across France, Belgium and Germany where 6 fatalities were recorded as a Bow Echo swept through North Rhine-Westphalia with winds up to 144 km/h.[22][23]
  • 2014, 17–21 July severe storms left at least two fatalities in France, with power cut to thousands of homes and localised flooding occurring in France and the United Kingdom.[24][25]

  http://en.wikipedia.org/wiki/Spanish_plume

.

What is a ‘Spanish Plume’?

http://metofficenews.wordpress.com/2011/05/05/what-is-a-spanish-plume/

There has been a lot of talk about warm weather expected across parts of England again this weekend.  Temperatures are forecast to reach the mid to high 20′s C on Friday and into the weekend, bringing the risk of thundery showers for some.  It has been reported that a ‘Spanish Plume’ is responsible for this. Here, Ewen McCallum, Met Office Chief Meteorologist explains what a ‘Spanish Plume’ is?

‘Spanish Plume’ is actually a rather catchy name for a rather complex meteorological phenomenon which leads to warm conditions and heavy showers or thunderstorms over parts of the UK and north-west Europe.

As the name suggests it is a plume of very warm air that pushes north from the Spanish plateau and reaches the British Isles on a southerly airflow.  Of course over the UK we are normally affected by much cooler Atlantic air as cold fronts encroach from the west. Now when these two air masses meet, the very warm ‘plume’ air is forced to rise vigorously over the cooler Atlantic air and as a result produces thunderstorms. Because these features can cover large areas the storms are often grouped together and can give widespread, heavy rainfall, often accompanied by hail.

 

 

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  • Biólogo desde hace más de treinta años, desde la época en que aún los biólogos no eran empleados de los abogados ambientalistas. Actualmente preocupado …alarmado en realidad, por el LESIVO TRATADO DE(DES)INTEGRACIÓN ENERGÉTICA CON BRASIL

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