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uk.sci.weather (UK Weather) (uk.sci.weather) For the discussion of daily weather events, chiefly affecting the UK and adjacent parts of Europe, both past and predicted. The discussion is open to all, but contributions on a practical scientific level are encouraged. |
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#1
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I assume it will be a meteotsunami associated with a passing cold front.
At least knowing of it in advance will give a chance to grab data about it http://www.ntslf.org/storm-surges/la...port=Sheerness and other south North Sea ports . With anticyclonic general status and lack of isobars, the sea level should be depressed a bit below nominal 1013mB level. Otherwise of no flooding consequnce as only neap tides at the moment. You get so used to surges being developed by low pressure systems and then west or east suges in the English Channel Other instances of meteotsunami http://www.theguardian.com/news/2016...sea-stonehaven more detail of the events referred to in that newspaper article From the Times, the 1892 event was a double earthquake generated tsunami, timings of the quake at different stations given, felt in Wales and whole of the SW . 1929 was meteotsunami associated with anticyclone Azores to Denmark and heatwave, 95 deg F max in Paris, 87degF max in London. 18degF sudden drop in temperature recorded at Winchester, generated series of 8 x 12 foot waves at Folkstone and a 20 foot wave Hastings, Sandown IoW got a bank of sand swept along the seafront. Both 2015 and 2011 events have been analysed in Weather magazine apparently. The main amplification suggested for the 2015 event is that the waves generated by the storm(s) were in shallow water (compared to the wavelength) and therefore travelled at a speed determined by the depth which happened to be similar to the speed of movement of the convective event in the atmosphere. I've not rediscovered the newspaper details of the 2011 event, "hair-raising" and lightning associated with the tsunami going over a causeway in the SW somewhere |
#2
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On 16/07/2016 07:46, N_Cook wrote:
I assume it will be a meteotsunami associated with a passing cold front. At least knowing of it in advance will give a chance to grab data about it http://www.ntslf.org/storm-surges/la...port=Sheerness and other south North Sea ports . With anticyclonic general status and lack of isobars, the sea level should be depressed a bit below nominal 1013mB level. Otherwise of no flooding consequnce as only neap tides at the moment. You get so used to surges being developed by low pressure systems and then west or east suges in the English Channel Other instances of meteotsunami http://www.theguardian.com/news/2016...sea-stonehaven more detail of the events referred to in that newspaper article From the Times, the 1892 event was a double earthquake generated tsunami, timings of the quake at different stations given, felt in Wales and whole of the SW . 1929 was meteotsunami associated with anticyclone Azores to Denmark and heatwave, 95 deg F max in Paris, 87degF max in London. 18degF sudden drop in temperature recorded at Winchester, generated series of 8 x 12 foot waves at Folkstone and a 20 foot wave Hastings, Sandown IoW got a bank of sand swept along the seafront. Both 2015 and 2011 events have been analysed in Weather magazine apparently. The main amplification suggested for the 2015 event is that the waves generated by the storm(s) were in shallow water (compared to the wavelength) and therefore travelled at a speed determined by the depth which happened to be similar to the speed of movement of the convective event in the atmosphere. I've not rediscovered the newspaper details of the 2011 event, "hair-raising" and lightning associated with the tsunami going over a causeway in the SW somewhere 2011 event http://www.bgs.ac.uk/research/highli...gland2011.html 1929 event In the Southampton Echo newspaper archives, the following monday, 22 July 1929, a lot of reportage of deaths and mayem from rain and lightning the Saturday evening, but little met or marine info. Just "tidal waves of considerable extent" and Southampton met report of 0.81 inches of rain fell during the storm and barometer showed "violent fluctuations" during the storm . |
#3
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![]() Surface Based CAPE output of GFS model is showing anomolous instability over the Thames Estuary area later today, what to look out for on the hourly near realtime geopotential plots later today, a travelling kink? |
#4
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On Saturday, 16 July 2016 09:57:45 UTC+1, N_Cook wrote:
Surface Based CAPE output of GFS model is showing anomolous instability over the Thames Estuary area later today, what to look out for on the hourly near realtime geopotential plots later today, a travelling kink? Has the Thames barrier been raised? |
#5
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On 16/07/2016 11:32, Alastair wrote:
On Saturday, 16 July 2016 09:57:45 UTC+1, N_Cook wrote: Surface Based CAPE output of GFS model is showing anomolous instability over the Thames Estuary area later today, what to look out for on the hourly near realtime geopotential plots later today, a travelling kink? Has the Thames barrier been raised? Its of no flooding consequence, just a rare meteorological induced effect. The west coast tide gauges are picking it up now, but meteorologically don't know its origins. Perhaps started off Scandinavia as that trough, then just North Sea bathynmetric funnelling effect and enhanced later on by Cape/Latent Heat instability over East anglia. Anyone know of any live feed web cams , birdwatchers? over Essex/Kent mudflats , .5m drop and rise over a short period would look impressive. |
#6
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On 16/07/2016 11:42, N_Cook wrote:
On 16/07/2016 11:32, Alastair wrote: On Saturday, 16 July 2016 09:57:45 UTC+1, N_Cook wrote: Surface Based CAPE output of GFS model is showing anomolous instability over the Thames Estuary area later today, what to look out for on the hourly near realtime geopotential plots later today, a travelling kink? Has the Thames barrier been raised? Its of no flooding consequence, just a rare meteorological induced effect. The west coast tide gauges are picking it up now, but meteorologically don't know its origins. Perhaps started off Scandinavia as that trough, then just North Sea bathynmetric funnelling effect and enhanced later on by Cape/Latent Heat instability over East anglia. Anyone know of any live feed web cams , birdwatchers? over Essex/Kent mudflats , .5m drop and rise over a short period would look impressive. For West Coast read East Coast |
#7
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On Saturday, 16 July 2016 11:42:22 UTC+1, N_Cook wrote:
On 16/07/2016 11:32, Alastair wrote: On Saturday, 16 July 2016 09:57:45 UTC+1, N_Cook wrote: Surface Based CAPE output of GFS model is showing anomolous instability over the Thames Estuary area later today, what to look out for on the hourly near realtime geopotential plots later today, a travelling kink? Has the Thames barrier been raised? Its of no flooding consequence, just a rare meteorological induced effect. What sort of physics did they have when you were at school the dawlish sort of stuff dawlish is recommending? |
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