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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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On Jan 22, 7:34*pm, Alan wrote:
On Jan 22, 6:36*pm, "Eskimo Will" wrote: "Adam Lea" wrote in message ... On 22/01/12 18:11, Stan wrote: *indestrcible azores high now trying to consume the uk. Is this an example of a Bartlett high situation? Absolutely not. A Bartlett high is a high that forms and then reforms under a zonal WSW'ly flow with a jet stretching from *Newfoundland all the way into Scandinavia. The meanders of this jet forms ridges behind travelling depressions which then settle over near Switzerland. They are trhen reinforced ad-infinitum by the pattern. The high developping from the Azores you are seeing on the charts is an area of rising pressure behind the disrupting upper trough. Many model runs link this area of rising pressure with the Russian high which is now the more permanent feature. It is the trough disruption process that is causing the uncertainty at the end of next week, e.g. how fast, UKMO is relatively slow, GFS is fast with the disruption hence the charts appear different but all show rising pressure over the UK with a cold slab of air entrained. Will upstream processes in teh Atlantic cause the Scandinavian block by then to push west, that is where the 50-50 scenario comes from. All complex and difficult to explain in words. Will --http://www.lyneside.demon.co.uk/Haytor/automatic/Current_Vantage_Pro.htm Will Hand (Haytor, Devon, 1017 feet asl) --------------------------------------------- Funny you should mention Switzerland. Will be there for a week starting next weekend. Base height of 1800m, skiing up to 3500m, *so also watching this evolve with interest, albeit from a slightly different angle. I never thought I would say this, but I hope it won't be too cold! Looking at the 23 Jan 2012 06Z GFS ENS it looks like there is already plenty of spaghetti on the 500 hPa, even at 120hrs. If I wanted spaghetti I would gave gone skiing in Italy not Switzerland! http://www.wetterzentrale.de/pics/Rz5005.html |
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