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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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#11
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![]() "Keith (Southend)" wrote in message ... Will Hand wrote: "Phil Layton" wrote in message ... "Will Hand" wrote in message ... cut Bitterly cold northerly with snow showers in eastern areas otherwise sunny - 5% Mild southwesterlies, cloudy and dry, with drizzle in Scotland - 10% Anticyclonic with persistent fog and frost - 40% Anticyclonic east or southeasterly, chilly with sunshine and early frost - 40% Bitterly cold or east north-easterlies with snow flurries in southeast - 5% Ciao, :-) Thanks Will for the daily updates. Everything to play for at the moment..bit like an Meteorologists Advent calendar opening a different box every day - EC tonight is Easterlies! Merry Xmas to you and yours. Phil Cheers Phil, I love your image of an advent calendar. Yes indeed EC T+240 (fantasy island) shows full blown retrogression after Boxing Day with a bitterly cold Arctic northerly poised to sweep south over Britain. It won't be right at that range of course but nicely illustrates the possibilities once the upper flow gets distorted into meridionality, which it will over the weekend. Will -- That would be nice ;-) What is different this year, is GFS, which normally goes for the "Day After Tomorrow" scenario, looks the least exciting. It's a shame UKMO don't venture into the T+240 land, it would be nice to compare. As always, this next two weeks often determines the pattern for January and into February, but I still don't hold out much hope for anything out the ordinary. -- Keith (Southend) http://www.southendweather.net e-mail: kreh at southendweather dot net ------------------------ You wouldn't say that Keith if you looked at today's (17th) GFS 12z evolution at T+192 ;-) . Load of rubbish of course - or is it??!! ;-)) It's getting like TWO on here with all this "Fantasy Island" and "all to play for" stuff ! Dave |
#12
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![]() "Dave Cornwell" wrote in message ... "Keith (Southend)" wrote in message ... Will Hand wrote: "Phil Layton" wrote in message ... "Will Hand" wrote in message ... cut Bitterly cold northerly with snow showers in eastern areas otherwise sunny - 5% Mild southwesterlies, cloudy and dry, with drizzle in Scotland - 10% Anticyclonic with persistent fog and frost - 40% Anticyclonic east or southeasterly, chilly with sunshine and early frost - 40% Bitterly cold or east north-easterlies with snow flurries in southeast - 5% Ciao, :-) Thanks Will for the daily updates. Everything to play for at the moment..bit like an Meteorologists Advent calendar opening a different box every day - EC tonight is Easterlies! Merry Xmas to you and yours. Phil Cheers Phil, I love your image of an advent calendar. Yes indeed EC T+240 (fantasy island) shows full blown retrogression after Boxing Day with a bitterly cold Arctic northerly poised to sweep south over Britain. It won't be right at that range of course but nicely illustrates the possibilities once the upper flow gets distorted into meridionality, which it will over the weekend. Will -- That would be nice ;-) What is different this year, is GFS, which normally goes for the "Day After Tomorrow" scenario, looks the least exciting. It's a shame UKMO don't venture into the T+240 land, it would be nice to compare. As always, this next two weeks often determines the pattern for January and into February, but I still don't hold out much hope for anything out the ordinary. -- Keith (Southend) http://www.southendweather.net e-mail: kreh at southendweather dot net ------------------------ You wouldn't say that Keith if you looked at today's (17th) GFS 12z evolution at T+192 ;-) . Load of rubbish of course - or is it??!! ;-)) It's getting like TWO on here with all this "Fantasy Island" and "all to play for" stuff ! Dave Well I think somethings up :-) Seriously, I'll update later this evening once all the runs/ensembles are in and my brain gets back in gear after a hard workout at the office today. It's all getting *very* interesting. Will -- |
#13
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![]() "Will Hand" wrote in message ... "Dave Cornwell" wrote in message ... "Keith (Southend)" wrote in message ... Will Hand wrote: "Phil Layton" wrote in message ... "Will Hand" wrote in message ... cut Bitterly cold northerly with snow showers in eastern areas otherwise sunny - 5% Mild southwesterlies, cloudy and dry, with drizzle in Scotland - 10% Anticyclonic with persistent fog and frost - 40% Anticyclonic east or southeasterly, chilly with sunshine and early frost - 40% Bitterly cold or east north-easterlies with snow flurries in southeast - 5% Ciao, :-) Thanks Will for the daily updates. Everything to play for at the moment..bit like an Meteorologists Advent calendar opening a different box every day - EC tonight is Easterlies! Merry Xmas to you and yours. Phil Cheers Phil, I love your image of an advent calendar. Yes indeed EC T+240 (fantasy island) shows full blown retrogression after Boxing Day with a bitterly cold Arctic northerly poised to sweep south over Britain. It won't be right at that range of course but nicely illustrates the possibilities once the upper flow gets distorted into meridionality, which it will over the weekend. Will -- That would be nice ;-) What is different this year, is GFS, which normally goes for the "Day After Tomorrow" scenario, looks the least exciting. It's a shame UKMO don't venture into the T+240 land, it would be nice to compare. As always, this next two weeks often determines the pattern for January and into February, but I still don't hold out much hope for anything out the ordinary. -- Keith (Southend) http://www.southendweather.net e-mail: kreh at southendweather dot net ------------------------ You wouldn't say that Keith if you looked at today's (17th) GFS 12z evolution at T+192 ;-) . Load of rubbish of course - or is it??!! ;-)) It's getting like TWO on here with all this "Fantasy Island" and "all to play for" stuff ! Dave Well I think somethings up :-) Seriously, I'll update later this evening once all the runs/ensembles are in and my brain gets back in gear after a hard workout at the office today. It's all getting *very* interesting. Will -------------------- ... and like the cliche ridden England cricket team *just take the positives* out of this. Dave |
#14
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DT12Z 17th runs are very consistent. The low running towards Greenland now
looks like passing to the east of it ensuring high development over the UK and indeed with centres just to the east. Cold northerly plunge taking place still into eastern Europe. Exact location of high cell on Christmas Day still uncertain but now much more likely to be east of UK than to west, it is now a matter of whether it subsequently pushes north or not. Interestingly after Christmas both EC and GFS hint at retrogression and the possibility of a very cold east or northeasterly with snow showers in eastern areas. So here are my revised probabilities for Christmas Day: Anticyclonic east or southeasterly, becoming colder during the day, but dry with some sunshine - 60% Anticyclone over right UK with fog and frost - 30% Anticyclonic easterly with stronger winds in south with wintry showers into SE - 10% The really interesting stuff will be on Boxing Day and beyond, more on that as it becomes clearer. The DT12Z GFS is a cold outlier but now supported by other ensemble members and the ensemble mean temperature trend is firmly downwards. Also supported by ECMWF. But let's not get carried away :-) Cheers, Will -- "Will Hand" wrote in message ... Trends are becoming clearer and more consistent today, at least up to day before Christmas Eve. During the weekend a deepening low moving northwards from Newfoundland towards Greenland will finally distort the upper flow and amplify the developing high just to the west of the meridian over the UK. The behaviour of this low will be key for this amplification. Meanwhile another depression scoots across the north Atlantic rounding the UK ridge and dives into Scandinavia on Monday plunging very deep cold air southwards into eastern Europe and Russia. By Tuesday we should have an anticyclone somewhere over UK, but where will the centre be? The low which ran up to Greenland will continue to be key to this and how it interacts with the Greenland plateau, models never handle these things well. If it tends to the west of Greenland then we will have retrogression during Christmas week, ending up with a bitter northerly. If it tends to east then high will stay over UK and possibly sink a little southeastwards - more normal. GFS on one run took lows right across Greenland which is dynamically unrealistic, so I do not trust GFS as much in this sequence. So there you have it, high pressure now looking very likely but where will the centre of gravity be? This will be key to the weather and temperatures. Any sort of easterly after the deep cold plunge on Monday will be very cold indeed, south or southeasterlies will be milder of course and a high right over us will give us problems with fog. So here are my probabilities in which I still have low confidence in for Christmas Day. They will change as the situation becomes clearer, ECMWF, for example, is trending colder with each run with 528DAM now over Denmark in a north-easterly DT12Z today (16th). Bitterly cold northerly with snow showers in eastern areas otherwise sunny - 5% Mild southwesterlies, cloudy and dry, with drizzle in Scotland - 10% Anticyclonic with persistent fog and frost - 40% Anticyclonic east or southeasterly, chilly with sunshine and early frost - 40% Bitterly cold or east north-easterlies with snow flurries in southeast - 5% Ciao, :-) Will -- |
#15
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Will Hand wrote:
The really interesting stuff will be on Boxing Day and beyond, more on that as it becomes clearer. The DT12Z GFS is a cold outlier but now supported by other ensemble members and the ensemble mean temperature trend is firmly downwards. Also supported by ECMWF. But let's not get carried away :-) Cheers, Will -- It is certainly looking a lot more interesting now Will, I'm clinging to every word of your threads trying to squeeze the last drop out of it ;-) Seriously though, what is the underlining cause of the models getting nervous in this way? Jet stream, SST anomalies? I was also thinking why the hell I want snow, and I guess it's a case of actually recording one of those memorable winters now I have all the equipment, yes I have some records of 1963, but these are not mine as I was just 3 years old then. Gosh, what am I saying, another pink elephant flies by ... -- Keith (Southend) http://www.southendweather.net e-mail: kreh at southendweather dot net |
#16
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"Will Hand" wrote in message
... Anticyclone over right UK with fog and frost - 30% Any chance of some snow grains in there, Will ? ;-) Jon. |
#17
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On 17 Dec, 19:18, "Dave Cornwell"
wrote: -------------------- .. and like the cliche ridden England cricket team *just take the positives* out of this. Hopefully we won't have too much positive spin this christmas though - maybe more negative spin, centred over Scandinavia. I'll get me coat. Richard |
#18
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![]() "Jon O'Rourke" wrote in message ... "Will Hand" wrote in message ... Anticyclone over right UK with fog and frost - 30% Any chance of some snow grains in there, Will ? ;-) Jon. ------------------------ Grains of truth would be nice ;-) Dave |
#19
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Hmmm, i dislike the phrase
"it's all to play for" I think it's the most overused phrase on weather message boards It doesn't really say anything. Our language is full of useless phrases. It's never just a nice day... it's: Basically, a nice day In the fullness of time, basically, at the end of the day, we may just arrive at the conclusion that today we spent fifty percent of our time, padding out our sentences with meaningless phrases. I'll touch base with you later, and see if you agree |
#20
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![]() "BlueLightning" wrote in message ... Hmmm, i dislike the phrase "it's all to play for" I think it's the most overused phrase on weather message boards It doesn't really say anything. Our language is full of useless phrases. It's never just a nice day... it's: Basically, a nice day In the fullness of time, basically, at the end of the day, we may just arrive at the conclusion that today we spent fifty percent of our time, padding out our sentences with meaningless phrases. I'll touch base with you later, and see if you agree ------ Exactly, a whole raft of cliches there. Dave (Just to rid myself of two more annoyances) |
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