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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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![]() "Jon O'Rourke" wrote in message ... "Chris Smith" wrote in message ... If it snows in Norfolk this week, I'll eat my hat. I think you'll be munching on a Stetson in 2 or 3 days, Chris :-) Jon. ROFL I love it Jon. Sleet getting heavier here now. 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. ------------------------------------------------------------------------------- |
#12
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![]() Dave.C wrote: Yes, saw it and realise yet again that I know nothing about forecasting. From all angles, including past experience, looking at charts etc I would have expected it to be colder. I had always thought that at this time of year with the North Sea reaching it's coldest NE'lies were as cold as they are likely to be. Why 5-6C for the S.E. Answers on a postcard please. ;-) Here's your postcard, Dave. The air at the source (N Scandinavia, NW Russia) is not particularly cold. A few weeks ago it would have been a different story. Agreed that simply looking at a surface chart would give one the impression of a very cold spell but a few thickness lines give the game away, not that they are always a reliable guide in winter, with inversions. But the sea track will ensure that any inversion is warmed out somewhat. Tudor Hughes, Warlingham, Surrey. |
#13
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In message , Jim
writes Forecast for the week is for high pressure to sit to the north east of UK and basically light rain sleet or snow in the north east and east no mention of any appreciable falls of snow. Keen north east wind for most all week. Temps 4c - 6c I'm not expecting anything here! Must admit when I saw Wills forecast it look like my 6 cms of snow in November was going to get some serious competition but having just seen the Country File forecast NO Worries!! I reckon March may be the month when we see some snow, lets face it there's more chance of snow in Autumn and Spring than Winter these days! Just 9 more days before this SAD Winter ends ![]() -- Graham |
#14
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Graham wrote:
I reckon March may be the month when we see some snow, lets face it there's more chance of snow in Autumn and Spring than Winter these days! As forecast by N E Davis about 35 years ago! Well, "forecast" is perhaps too strong a word but he did point out the 100-year (if I remember correctly) temperature cycles of the seasons and that they were out of phase with each other. Winters were at the low point of their cycle in the sixties and, if the cycle continued, they would still be warming and heading for a maximum in ten years time. Autumns were in about an opposite phase to winters and were then just passing their maximum and so should be reaching their coldest point in a decade. Springs had just come to the end of a 50-year warm period and were headed for 50 cold years. I can't remember the pattern for the summers but am guessing the opposite phase to the springs. -- Graham Davis Bracknell |
#15
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I'm going to be blunt.
The only people 'disappointed' by the country file forecast, are the ones that bought into false hype Everyone was hoping the BBC Forecasts would come into line with THEIR OWN wishes Sorry, but i think some people are living in an alternate reality. One where, some sort of blizzard, or country-wide snowfall are always just a few days away, but never materalises.... down that road... awaits depression (not of the weather type) Mostly fueled by (you know who) Go see the front page of: http://www.theweatheroutlook.com/ "Winter Returns - Blizzards for some" That's the alternate reality i'm talking about |
#16
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![]() "Will Hand" wrote in message ... "Jon O'Rourke" wrote in message ... "Chris Smith" wrote in message ... If it snows in Norfolk this week, I'll eat my hat. I think you'll be munching on a Stetson in 2 or 3 days, Chris :-) You could always start with some wild berets. Hmmm.....lovley with cream. |
#17
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Thanks for the postcard, Tudor ;-) I understand what you are saying but it's
still not that obvious compared to event last year which had air temps of around 1-3C for that week. The southern North Sea is showing 5-6C atm which I believe is lower than last year and the wind the track is quite rapid. I thought the continent was even warmer last year. Wednesday is forecast to be 7C max with -7C 850 hPa. Will also has seemed a bit surprised by this but I take your point and realise there must be different factors this year. Thanks, Dave "Tudor Hughes" wrote in message oups.com... Dave.C wrote: Yes, saw it and realise yet again that I know nothing about forecasting. From all angles, including past experience, looking at charts etc I would have expected it to be colder. I had always thought that at this time of year with the North Sea reaching it's coldest NE'lies were as cold as they are likely to be. Why 5-6C for the S.E. Answers on a postcard please. ;-) Here's your postcard, Dave. The air at the source (N Scandinavia, NW Russia) is not particularly cold. A few weeks ago it would have been a different story. Agreed that simply looking at a surface chart would give one the impression of a very cold spell but a few thickness lines give the game away, not that they are always a reliable guide in winter, with inversions. But the sea track will ensure that any inversion is warmed out somewhat. Tudor Hughes, Warlingham, Surrey. |
#18
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Graham P Davis wrote:
As forecast by N E Davis about 35 years ago! Well, "forecast" is perhaps too strong a word but he did point out the 100-year (if I remember correctly) temperature cycles of the seasons and that they were out of phase with each other. Winters were at the low point of their cycle in the sixties and, if the cycle continued, they would still be warming and heading for a maximum in ten years time. Autumns were in about an opposite phase to winters and were then just passing their maximum and so should be reaching their coldest point in a decade. Springs had just come to the end of a 50-year warm period and were headed for 50 cold years. I can't remember the pattern for the summers but am guessing the opposite phase to the springs. Interesting speculation on cycles. Obviously there was nothing to go on for the state of the ice cover in the Arctic but he seems to have made a good stab at the same results with the tools he had available to him. Who was this genius? And can anybody forward me a copy of this article. I'd hate to have to go to the Yanks for it: The variability of the onset of spring in Britain Author: N.E. DAVIS Source: Quarterly Journal of the Royal Meteorological Society, Volume 98, Number 418, October 1972, pp. 763-777(15) Publisher:Royal Meteorological Society Abstract: The first day of spring is defined in terms of daily maximum temperatures. Spring at Oxford as defined begins some time between the third week of February and the last week of April. The average date shows a secular change over the last hundred years. The date of the first day of spring is shown to be related to ice conditions in the Baltic and in the Iceland area, to the sea temperature pattern in the North Atlantic, the circulation patterns at 500 mb and to various atmospheric indices. Rules developed from these relationships enable 'statistical' forecasts for the first day of spring to be made. Document Type: Research article DOI: 10.1256/smsqj.41804 |
#19
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Weatherlawyer wrote:
Interesting speculation on cycles. Obviously there was nothing to go on for the state of the ice cover in the Arctic but he seems to have made a good stab at the same results with the tools he had available to him. Who was this genius? What might have appeared obvious is not completely true. In the late sixties and early seventies, I used to brief the Met Office long-range-forecast team each month as to ice conditions in the Arctic. To be fair, the amount of actual data was variable. We were only able to start using satellite data in about '65 and that wasn't a great deal of help in the depths of winter. Even summer was a problem due to the large amounts of low cloud over the Arctic. Infrared pictures came in later but they didn't show up thin ice and also low cloud was again a problem. We had ship reports and some aircraft recces but coverage wasn't great. Commercial airlines had just started flying over the Arctic and we persuaded them to mark the ice edge on a postcard as they over-flew it and to post it to us after landing. Where we had no reports we relied on degree-day data and pressure charts (mainly 10-day means). The normals in ice atlases were generally quite reliable but with a few glaring exceptions. For instance, until the first satellite data arrived, it was believed that the centre of Hudson Bay remained ice-free throughout the year as opposed to what we soon found out, which was that it was covered for half the year. That's all drifting off the subject a bit however. I can't remember what data N E Davis used - this was in a talk he gave at the Met Office at the end of 1969 and my memory isn't that good - but I suspect that tree rings came into it somewhere. As far as I recall, these cycles applied to the UK only. In 1975, the Global Atmospheric Research Program produced an analysis of global temperature in terms of five cycles, ranging in length from 100 to 10,000 years. This was based on 700,000 years of paleoclimatic data. There has probably been more research on these lines since then but I'm a bit out of touch. -- Graham Davis Bracknell |
#20
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![]() Graham P Davis wrote: What might have appeared obvious is not completely true. In the late sixties and early seventies, I used to brief the Met Office long-range-forecast team each month as to ice conditions in the Arctic. To be fair, the amount of actual data was variable. We were only able to start using satellite data in about '65 and that wasn't a great deal of help in the depths of winter. Even summer was a problem due to the large amounts of low cloud over the Arctic. Infrared pictures came in later but they didn't show up thin ice and also low cloud was again a problem. We had ship reports and some aircraft recces but coverage wasn't great. Commercial airlines had just started flying over the Arctic and we persuaded them to mark the ice edge on a postcard as they over-flew it and to post it to us after landing. Where we had no reports we relied on degree-day data and pressure charts (mainly 10-day means). The normals in ice atlases were generally quite reliable but with a few glaring exceptions. For instance, until the first satellite data arrived, it was believed that the centre of Hudson Bay remained ice-free throughout the year as opposed to what we soon found out, which was that it was covered for half the year. That's all drifting off the subject a bit however. I can't remember what data N E Davis used - this was in a talk he gave at the Met Office at the end of 1969 and my memory isn't that good - but I suspect that tree rings came into it somewhere. As far as I recall, these cycles applied to the UK only. In 1975, the Global Atmospheric Research Program produced an analysis of global temperature in terms of five cycles, ranging in length from 100 to 10,000 years. This was based on 700,000 years of paleoclimatic data. There has probably been more research on these lines since then but I'm a bit out of touch. Thanks for the reply. I haven't anything positive to say against dendochronology per se but I have a deep suspicion of it. And of course it is the only chronologically logical model we can rely on, there being massive problems with every other dating method. The best of which (radio active carbon) is extremely iffy. Imagine putting great pedestals of modern thought and the abandonment of thousands of years of ancient ideals, on ideas less reliable than our knowledge of the surface conditions of the Hudson Bay. Crackers isn't it? I feel like going out and voting for a chimpanzee. |
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