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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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![]() ================================================== ================== This posting expresses the personal view and opinions of the author. Something which everyone on this planet should be able to do. ================================================== ================== Haven't checked these out for a while and I'm pleased to report back that they all now have thickness lines at T+36 and beyond. http://www.metoffice.com/weather/charts/index.html Will. -- " Ah yet another day to enjoy " ------------------------------------------------------------------------------- A COL BH site in East Dartmoor at Haytor, Devon 310m asl (1017 feet). mailto: www: http://www.lyneside.demon.co.uk/Hayt...antage_Pro.htm DISCLAIMER - All views and opinions expressed by myself are personal and do not necessarily represent those of my employer. ------------------------------------------------------------------------------- |
#2
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Will Hand wrote:
================================================== ================== This posting expresses the personal view and opinions of the author. Something which everyone on this planet should be able to do. ================================================== ================== Haven't checked these out for a while and I'm pleased to report back that they all now have thickness lines at T+36 and beyond. http://www.metoffice.com/weather/charts/index.html Will. -- " Ah yet another day to enjoy " ------------------------------------------------------------------------------- A COL BH site in East Dartmoor at Haytor, Devon 310m asl (1017 feet). mailto: www: http://www.lyneside.demon.co.uk/Hayt...antage_Pro.htm DISCLAIMER - All views and opinions expressed by myself are personal and do not necessarily represent those of my employer. ------------------------------------------------------------------------------- Why do they not have thickness lines for the earlier ones? -- Keith (Southend) http://www.southendweather.net |
#3
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![]() "Will Hand" wrote in message ... ================================================== ================== This posting expresses the personal view and opinions of the author. Something which everyone on this planet should be able to do. ================================================== ================== Haven't checked these out for a while and I'm pleased to report back that they all now have thickness lines at T+36 and beyond. http://www.metoffice.com/weather/charts/index.html Will. -- Ah yes and briefly the other day, a 528 dam line appeared all the way down to central-southern England for Sunday. All gone now and come to think of it, maybe I saw that elsewhere. Sorry for the pointless comment. Nevermind, feels much fresher and winter-like outside already but not for long. Regards Tony 4.5c and falling slowly Newbury, Berkshire |
#4
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![]() "Tony Powell" wrote in message ... "Will Hand" wrote in message ... Ah yes and briefly the other day, a 528 dam line appeared all the way down to central-southern England for Sunday. Yes I know the latest charts only go as far as Saturday??? I'll go crawl under my stone. Tony |
#5
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![]() "Keith (Southend)" wrote in message ... Will Hand wrote: ================================================== ================== This posting expresses the personal view and opinions of the author. Something which everyone on this planet should be able to do. ================================================== ================== Haven't checked these out for a while and I'm pleased to report back that they all now have thickness lines at T+36 and beyond. http://www.metoffice.com/weather/charts/index.html Will. -- " Ah yet another day to enjoy " ------------------------------------------------------------------------------ - A COL BH site in East Dartmoor at Haytor, Devon 310m asl (1017 feet). mailto: www: http://www.lyneside.demon.co.uk/Hayt...antage_Pro.htm DISCLAIMER - All views and opinions expressed by myself are personal and do not necessarily represent those of my employer. ------------------------------------------------------------------------------ - Why do they not have thickness lines for the earlier ones? Haven't a bloomin clue Keith. Jon ? I'm sure there is some pragmatic or historical reason. Will. -- |
#6
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"Tony Powell" wrote in message
... Ah yes and briefly the other day, a 528 dam line appeared all the way down to central-southern England for Sunday. All gone now and come to think of it, maybe I saw that elsewhere. (12Z GFS T+90) http://wetterzentrale.de/pics/Rtavn903.gif IIRC the 12Z MetO GM was similar. Jon. |
#7
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"Will Hand" wrote in message
... "Keith (Southend)" wrote in message ... Why do they not have thickness lines for the earlier ones? Haven't a bloomin clue Keith. Jon ? I'm sure there is some pragmatic or historical reason. Not sure, could be a mixture of both. I'll probe Martin, so to speak. Jon. |
#8
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![]() "Jon O'Rourke" wrote in message ... "Tony Powell" wrote in message ... Ah yes and briefly the other day, a 528 dam line appeared all the way down to central-southern England for Sunday. All gone now and come to think of it, maybe I saw that elsewhere. (12Z GFS T+90) http://wetterzentrale.de/pics/Rtavn903.gif IIRC the 12Z MetO GM was similar. Jon. Cheers Jon, Wetterz..etc. was the one, although the plunge I'm sure went further south still. I must have dredged it up from this NG somewhere. Anyway I'm hoping for a change of sorts something along the lines of what we saw today in Newbury. Now I mustn't, I mustn't, I mustn't start these cold-weather threads. Thank goodness the political claptrap from Mr. 666 is gone, good riddance! Remember him (o: Regards Tony, 4c and ice on cars soon methinks Newbury, Berkshire |
#9
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"Tony Powell" wrote in message
... Anyway I'm hoping for a change of sorts something along the lines of what we saw today in Newbury. Now I mustn't, I mustn't, I mustn't start these cold-weather threads. Thank goodness the political claptrap from Mr. 666 is gone, good riddance! Remember him (o: Regards Tony, 4c and ice on cars soon methinks Newbury, Berkshire Oh yes, probably disappeared up his own vortex :-) Notice Redhill aerodrome's down to 0°C at 2100Z. http://www.metoffice.gov.uk/weather/...t_obs.html#see Jon. |
#10
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![]() Keith (Southend) wrote: Why do they not have thickness lines for the earlier ones? Keith, Martin Rowley very kindly answered this for me in a post dated 21st January, as follows: "Tom Bennett" wrote in message ... Looking at the previous thread has prompted me to ask something I've been wondering about for a while. Why doesn't thickness appear on any of the forecast charts until T +36 hrs and later? (I'm looking at the UKMO charts on Wetterzentrale). I'll answer this question from the information that I know, but emphasise that there are others who look in to this newsgroup who could add more detail and perhaps correct some of the below .. though I think the broad thrust of the answer is correct:-.................... The question should be:.... "why *do* the charts beyond T+24 have thickness isopleths on them?" In days long ago, there were only the Baratic (T+0) and the Prebaratic (T+24). (before my time I hasten to add). In association with these, upper air charts were issued, both analysis and forecast (Contour / Prontour), in coded and chart format - the latter more widely as facsimile was developed. There was _no need_ to add thickness lines to the Baratic/Prebar surface charts - forecasters would have separate charts for same - indeed many outfield forecasters would independently both analyse and 'prog' such and draw their own conclusions to add to (or deviate from) the guidance from Dunstable/Bracknell, using the work of Sutcliffe & Forsdyke. When the T+48/T+72 came along (can't remember when ... certainly in use by the late 1960's as I was heading up FAX charts for them every night) then the only way to indicate broad-scale thermal distribution was by adding the isopleths of thickness. This practice was continued when T+96/120 were introduced (again, memory hazy ... could be late 1970's?). In this time, there was no Internet, no ODS, no Horace, no Nimbus etc., etc. and production of upper air forecasts in chart format beyond T+24 would have clogged up the land-line FAX circuits too much (remembering that hourly/3-hourly charts had to be broadcast, along with plotted tephigrams, upper wind sheets and a whole host of other output - all taking up sizeable slabs of broadcast time.) It wouldn't have seemed odd to Met Office users NOT to have thickness on the ASXX/FSXX - it only seems so now because of the changing times. (And as Jon has noted elsewhere, for Radiofax use, where reception could be 'iffy' at times, they might have clashed with all the labels, continuity, tracking, 35kn plots etc.) Whether there will be any move to put thickness on the T+24, I'm not so sure; there is no good operational reason for doing this as 'mainstream' users can pull up the associated TTHK and, more importantly, much *better* air mass tracers like ThetaW fields to use for things like expected temperatures, snow risk etc. Martin. |
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