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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'm sure I'm not alone in following the various weather models on a
dialy basis and seeing that enormous long-wave trough constantly being shown digging in at our longitude and wondering when it will shift. The hunches of a week, or so, ago are looking closer to becoming a depressing outcome - certainly regarding the rest of July. Yesterday, the ECM showed a chink of warm sunshine T240, with the Azores high ridging towards us and percieved wisdom is that the ECM is generally more accurate at a week+ than the gfs (it certainly is out to 6 days, but there are no comparison figures for 7-10 days and I don't subscribe to that "wisdom" as a result). Today, the ECM at 10 days shows the familiar depressing pattern of low pressures slowly crossing the UK with the briefest of ridges producing warmth and sunshine. It has come back into line with what the gfs is showing - unsettled, wet and cool to 10 days for many of us; the SE faring better than the NW in a zonal, Atlantic-dominated flow. Persistence is a clue to late summer, as has been commented on. I'd go with short odds on the second half of the summer being cooler than the first half, based on the current models and the weighting of persistence (i.e. more likely). However, I'd still go with odds above evens for the whole summer being cooler than average (i.e. less likely). The first half has been warmer than average and even foul set- ups like this one don't seem to produce the summer cold that they used to. I also haven't changed my point of view that no-one really knows what will happen with the weather past about 10 days.At this time of year, extra-tropical ex-hurricanes can alter the dynamics of the northern Atlantic synoptics and an, as yet unshown, shift in the pressure patterns can change things completely. Maybe I'm clutching at straws for the next 6 weeks, but the obvious and great thing is that we won't know until late Aug what UK summer 2009 will actually have been like! |
#2
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![]() "Dawlish" wrote in message ... I'm sure I'm not alone in following the various weather models on a dialy basis and seeing that enormous long-wave trough constantly being shown digging in at our longitude and wondering when it will shift. The hunches of a week, or so, ago are looking closer to becoming a depressing outcome - certainly regarding the rest of July. Yesterday, the ECM showed a chink of warm sunshine T240, with the Azores high ridging towards us and percieved wisdom is that the ECM is generally more accurate at a week+ than the gfs (it certainly is out to 6 days, but there are no comparison figures for 7-10 days and I don't subscribe to that "wisdom" as a result). Today, the ECM at 10 days shows the familiar depressing pattern of low pressures slowly crossing the UK with the briefest of ridges producing warmth and sunshine. It has come back into line with what the gfs is showing - unsettled, wet and cool to 10 days for many of us; the SE faring better than the NW in a zonal, Atlantic-dominated flow. Persistence is a clue to late summer, as has been commented on. I'd go with short odds on the second half of the summer being cooler than the first half, based on the current models and the weighting of persistence (i.e. more likely). However, I'd still go with odds above evens for the whole summer being cooler than average (i.e. less likely). The first half has been warmer than average and even foul set- ups like this one don't seem to produce the summer cold that they used to. I also haven't changed my point of view that no-one really knows what will happen with the weather past about 10 days.At this time of year, extra-tropical ex-hurricanes can alter the dynamics of the northern Atlantic synoptics and an, as yet unshown, shift in the pressure patterns can change things completely. Maybe I'm clutching at straws for the next 6 weeks, but the obvious and great thing is that we won't know until late Aug what UK summer 2009 will actually have been like! It always worries me when, after a reasonable start to summer, it takes a turn for the worse end of June/beginning of July with the jet waking up etc. It happened in 1988, for example, and again last year. (OK this July has not been quite as bad as 1988, but even when the weather has been ok, it has been unpleasantly windy, just like last year) When it breaks at that time, it often stays broke and gut feeling tells me we may have to wait till the 2nd half of August for any real improvement. It remains to be seen whether we break the 80f mark this year here - the year's high remains at 26.1c. (In fact we have had just one day over the 80f mark since the end of July 2006 - 3 years ago) Poor. Jim, Bournemouth |
#3
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![]() "Jim Smith" wrote in message ... It always worries me when, after a reasonable start to summer, it takes a turn for the worse end of June/beginning of July with the jet waking up etc. It happened in 1988, for example, and again last year. (OK this July has not been quite as bad as 1988, but even when the weather has been ok, it has been unpleasantly windy, just like last year) When it breaks at that time, it often stays broke and gut feeling tells me we may have to wait till the 2nd half of August for any real improvement. It remains to be seen whether we break the 80f mark this year here - the year's high remains at 26.1c. (In fact we have had just one day over the 80f mark since the end of July 2006 - 3 years ago) Really? I've had two, July 1st & July 2nd. Highest was 28.9C on the 1st. I'd have thought Bournemouth would get it's fair share of hot days or is see breezes that kept things lower in the late June/early July hot spell? -- Col Bolton, Lancashire 160m asl |
#4
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Jim Smith wrote:
"Dawlish" wrote in message ... I'm sure I'm not alone in following the various weather models on a dialy basis and seeing that enormous long-wave trough constantly being shown digging in at our longitude and wondering when it will shift. The hunches of a week, or so, ago are looking closer to becoming a depressing outcome - certainly regarding the rest of July. Yesterday, the ECM showed a chink of warm sunshine T240, with the Azores high ridging towards us and percieved wisdom is that the ECM is generally more accurate at a week+ than the gfs (it certainly is out to 6 days, but there are no comparison figures for 7-10 days and I don't subscribe to that "wisdom" as a result). Today, the ECM at 10 days shows the familiar depressing pattern of low pressures slowly crossing the UK with the briefest of ridges producing warmth and sunshine. It has come back into line with what the gfs is showing - unsettled, wet and cool to 10 days for many of us; the SE faring better than the NW in a zonal, Atlantic-dominated flow. Persistence is a clue to late summer, as has been commented on. I'd go with short odds on the second half of the summer being cooler than the first half, based on the current models and the weighting of persistence (i.e. more likely). However, I'd still go with odds above evens for the whole summer being cooler than average (i.e. less likely). The first half has been warmer than average and even foul set- ups like this one don't seem to produce the summer cold that they used to. I also haven't changed my point of view that no-one really knows what will happen with the weather past about 10 days.At this time of year, extra-tropical ex-hurricanes can alter the dynamics of the northern Atlantic synoptics and an, as yet unshown, shift in the pressure patterns can change things completely. Maybe I'm clutching at straws for the next 6 weeks, but the obvious and great thing is that we won't know until late Aug what UK summer 2009 will actually have been like! It always worries me when, after a reasonable start to summer, it takes a turn for the worse end of June/beginning of July with the jet waking up etc. It happened in 1988, for example, and again last year. (OK this July has not been quite as bad as 1988, but even when the weather has been ok, it has been unpleasantly windy, just like last year) When it breaks at that time, it often stays broke and gut feeling tells me we may have to wait till the 2nd half of August for any real improvement. It remains to be seen whether we break the 80f mark this year here - the year's high remains at 26.1c. (In fact we have had just one day over the 80f mark since the end of July 2006 - 3 years ago) Poor. Jim, Bournemouth What is disturbing is that after 2 poor summers I had a firm belief that that this one would be better, I guess including June it has been, but didn't really expect July to be as bad as this. Keep the Whiskey and Paracetamol away from me ! -- Keith (Southend) http://www.southendweather.net e-mail: kreh at southendweather dot net |
#5
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![]() "Keith(Southend)" wrote in message ... What is disturbing is that after 2 poor summers I had a firm belief that that this one would be better, I guess including June it has been, but didn't really expect July to be as bad as this. Since the hot spell ended on July 3rd temperatures haven't been too bad, around 20C on most days. Showers at times but all in all not too bad. These last few days things have definately taken a turn for the worse. 16.2C on Friday, 16.4C yesterday (despite a reasonably sunny afternoon). Currently 15.1C with light rain. -- Col Bolton, Lancashire 160m asl |
#6
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Col wrote:
"Keith(Southend)" wrote in message ... What is disturbing is that after 2 poor summers I had a firm belief that that this one would be better, I guess including June it has been, but didn't really expect July to be as bad as this. Since the hot spell ended on July 3rd temperatures haven't been too bad, around 20C on most days. Showers at times but all in all not too bad. These last few days things have definately taken a turn for the worse. 16.2C on Friday, 16.4C yesterday (despite a reasonably sunny afternoon). Currently 15.1C with light rain. 19.4°C currently here at Southend-on-Sea, but quite breezy. -- Keith (Southend) http://www.southendweather.net e-mail: kreh at southendweather dot net |
#7
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On 19 July, 11:33, "Col" wrote:
"Keith(Southend)" wrote in message ... What is disturbing is that after 2 poor summers I had a firm belief that that this one would be better, I guess including June it has been, but didn't really expect July to be as bad as this. Since the hot spell ended on July 3rd temperatures haven't been too bad, around 20C on most days. Showers at times but all in all not too bad. These last few days things have definately taken a turn for the worse. 16.2C on Friday, 16.4C yesterday (despite a reasonably sunny afternoon). Currently 15.1C with light rain. -- Col Bolton, Lancashire 160m asl Similar here. Only only day failed to exceed 19C during the period 1st-15th July (17.4C on 11th). But since a very wet day on 16th temperatures have really struggled. After a very windy & showery morning sunny spells & dry this aftenoon, but temperatures held back in the 17-17.5C range. Still a gusty wind, but OK in sheltered spots -like the Minack. Graham Penzance. |
#8
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![]() After a very windy & showery morning sunny spells & dry this aftenoon, but temperatures held back in the 17-17.5C range. Late 'surge' in temperature to a max of 19.3C, so not too cool now. Graham |
#9
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On Jul 19, 11:04*am, "Jim Smith" wrote:
"Dawlish" wrote in message ... I'm sure I'm not alone in following the various weather models on a dialy basis and seeing that enormous long-wave trough constantly being shown digging in at our longitude and wondering when it will shift. The hunches of a week, or so, ago are looking closer to becoming a depressing outcome - certainly regarding the rest of July. Yesterday, the ECM showed a chink of warm sunshine T240, with the Azores high ridging towards us and percieved wisdom is that the ECM is generally more accurate at a week+ than the gfs (it certainly is out to 6 days, but there are no comparison figures for 7-10 days and I don't subscribe to that "wisdom" as a result). Today, the ECM at 10 days shows the familiar depressing pattern of low pressures slowly crossing the UK with the briefest of ridges producing warmth and sunshine. It has come back into line with what the gfs is showing - unsettled, wet and cool to 10 days for many of us; the SE faring better than the NW in a zonal, Atlantic-dominated flow. Persistence is a clue to late summer, as has been commented on. I'd go with short odds on the second half of the summer being cooler than the first half, based on the current models and the weighting of persistence (i.e. more likely). However, I'd still go with odds above evens for the whole summer being cooler than average (i.e. less likely). The first half has been warmer than average and even foul set- ups like this one don't seem to produce the summer cold that they used to. I also haven't changed my point of view that no-one really knows what will happen with the weather past about 10 days.At this time of year, extra-tropical ex-hurricanes can alter the dynamics of the northern Atlantic synoptics and an, as yet unshown, shift in the pressure patterns can change things completely. Maybe I'm clutching at straws for the next 6 weeks, but the obvious and great thing is that we won't know until late Aug what UK summer 2009 will actually have been like! It always worries me when, after a reasonable start to summer, it takes a turn for the worse end of June/beginning of July with the jet waking up etc. It happened in 1988, for example, and again last year. (OK this July has not been quite as bad as 1988, but even when the weather has been ok, it has been unpleasantly windy, just like last year) When it breaks at that time, it often stays broke and gut feeling tells me we may have to wait till the 2nd half of August for any real improvement. It remains to be seen whether we break the 80f mark this year here - the year's high remains at 26.1c. (In fact we have had just one day over the 80f mark since the end of July 2006 - 3 years ago) Poor. Jim, Bournemouth- Hide quoted text - - Show quoted text - Never trust weather models at T240+ I say! Some hints of changes at the month's end. I hope this augurs some better weather, actually from Saturday onwards for many areas, but a continuation of decent weather much past the weekend is not certain, by any means......yet. However, there are far less depressing possibilities now than only 30 hours ago when I started this thread - (the feigned negativity, inviting a retaliatory change of pattern from the weather god, worked it's magic then!!) *)) Since yesterday evening, the gfs output has been changing from unremittingly dire to something better. No good without a similar change from the ECM mind. There were hints that the azores high could ridge from the ECM yesterday and it too shows sunny, warm weather in the coming weekend for nearly all areas, but the ridge it shows is, as yet, transitory. I hope the gfs has the pattern change, but it's too early to call on this one. |
#10
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On Jul 20, 5:01*pm, Dawlish wrote:
On Jul 19, 11:04*am, "Jim Smith" wrote: "Dawlish" wrote in message .... I'm sure I'm not alone in following the various weather models on a dialy basis and seeing that enormous long-wave trough constantly being shown digging in at our longitude and wondering when it will shift. The hunches of a week, or so, ago are looking closer to becoming a depressing outcome - certainly regarding the rest of July. Yesterday, the ECM showed a chink of warm sunshine T240, with the Azores high ridging towards us and percieved wisdom is that the ECM is generally more accurate at a week+ than the gfs (it certainly is out to 6 days, but there are no comparison figures for 7-10 days and I don't subscribe to that "wisdom" as a result). Today, the ECM at 10 days shows the familiar depressing pattern of low pressures slowly crossing the UK with the briefest of ridges producing warmth and sunshine. It has come back into line with what the gfs is showing - unsettled, wet and cool to 10 days for many of us; the SE faring better than the NW in a zonal, Atlantic-dominated flow. Persistence is a clue to late summer, as has been commented on. I'd go with short odds on the second half of the summer being cooler than the first half, based on the current models and the weighting of persistence (i.e. more likely). However, I'd still go with odds above evens for the whole summer being cooler than average (i.e. less likely). The first half has been warmer than average and even foul set- ups like this one don't seem to produce the summer cold that they used to. I also haven't changed my point of view that no-one really knows what will happen with the weather past about 10 days.At this time of year, extra-tropical ex-hurricanes can alter the dynamics of the northern Atlantic synoptics and an, as yet unshown, shift in the pressure patterns can change things completely. Maybe I'm clutching at straws for the next 6 weeks, but the obvious and great thing is that we won't know until late Aug what UK summer 2009 will actually have been like! It always worries me when, after a reasonable start to summer, it takes a turn for the worse end of June/beginning of July with the jet waking up etc. It happened in 1988, for example, and again last year. (OK this July has not been quite as bad as 1988, but even when the weather has been ok, it has been unpleasantly windy, just like last year) When it breaks at that time, it often stays broke and gut feeling tells me we may have to wait till the 2nd half of August for any real improvement. It remains to be seen whether we break the 80f mark this year here - the year's high remains at 26.1c. (In fact we have had just one day over the 80f mark since the end of July 2006 - 3 years ago) Poor. Jim, Bournemouth- Hide quoted text - - Show quoted text - Never trust weather models at T240+ I say! Some hints of changes at the month's end. I hope this augurs some better weather, actually from Saturday onwards for many areas, but a continuation of decent weather much past the weekend is not certain, by any means......yet. However, there are far less depressing possibilities now than only 30 hours ago when I started this thread - (the feigned negativity, inviting a retaliatory change of pattern from the weather god, worked it's magic then!!) * **)) Since yesterday evening, the gfs output has been changing from unremittingly dire to something better. No good without a similar change from the ECM mind. There were hints that the azores high could ridge from the ECM yesterday and it too shows sunny, warm weather in the coming weekend for nearly all areas, but the ridge it shows is, as yet, transitory. I hope the gfs has the pattern change, but it's too early to call on this one.- Hide quoted text - - Show quoted text - Mind you.......after the 12z, it could be back to square wet one at the end of July!! http://www.wetterzentrale.de/pics/Rtavn2402.png |
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