MidLatitude Weather Systems 2013 2014 Stormiest period of weather experienced by the UK for 143 years 12 major winter storms affecting the UK from midDecember to early January and late January to midFebruary ID: 561615
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Slide1
Low Pressure System = Mid - Latitude Depression = Cyclone
Mid-Latitude Weather SystemsSlide2
2013/ 2014
Stormiest period of weather experienced by the UK for 143 years
12 major winter storms affecting the UK, from mid-December to early January and late January to mid-February
Wettest winter in England and Wales since 1766
December 2013 was the wettest month since 1910
Fewest air frosts since 1961Slide3
And some things will never be the
same
again
Porthcothan
Bay, Cornwall
Porthreath
, CornwallSlide4
What governs the damage caused by a depression?
The pressure difference, which in turn determines the wind speedTime of year – are trees in leaf or not?
Preceding weather – is the ground waterlogged or not?The path of the stormThe time of the month – spring or neap tideForecast accuracySlide5
28
th
October 2013St Jude Storm
Comparison with 1987 storm
http://
www.bbc.co.uk/news/uk-24708614
Images and a report
http://www.bbc.co.uk/news/uk-24699748
Met Office Summary
http://metofficenews.wordpress.com/2013/10
/
Slide6
5th December 2013 Storm
Bodil/ Sven/ Xaver
http://
www.bbc.co.uk/news/uk-25229885
Storm
surge explanationSlide7
When pressure falls by one
millibar, sea level rises by one
centimetreWorst tidal surge in 60 years. Thames Barrier saved London.Slide8
2015 – Named Storms
Abigail
Barney
Clodagh
Desmond
Storm Abigail brought heavy rain and strong winds across the country with the most severe weather impacting the northwest of Scotland where power cuts affected up to 20,000 homes and many schools were forced to close for the day.
As forecast
, the
impacts
of Clodagh were
most severe in the Republic of Ireland as gusts of more than 70 mph leaving 3,500 people without electricity.
The
strong winds caused transport disruption and cancellations with fallen trees blocking roads and railway lines in the North of England and several cancellations in across Scotland
Devastating flooding in Cumbria and parts of Lancashire