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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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Richard Dixon wrote:
On Wednesday, 26 September 2012 07:55:38 UTC+1, David Allan wrote: Just heard the weather of the last couple of days described on BBC radio as the "...worst September storms for 30 years...", which, if true, sort of answers my previous question of just how unusual is this sort of weather. what might arrive on our doorsteps for the closing months of 2012? I only had video of Peter Gibbs but no audio and was wondering what they were using to classify the "worseness". I saw a 973mb on the chart which made me wonder whether they were simply using central pressure as a proxy for "worseness"... Richard ------------------------------ My thoughts entirely Richard. What criteria were used to define "worst" September storm? Was it amount of rain and number of regions affected,low pressure, wind speed (I doubt it), population size affected. I just don't see how they could come to this conclusion other than in some subjective way. I'm not disputing it - just not sure what the criteria are for a "storm" Dave |
#12
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On Wednesday, 26 September 2012 11:22:53 UTC+1, Ken Cook wrote:
In this part of Teesdale, not a long way from you, with 111.1mm it has been the biggest rainfall event that I have recorded since September 1976 which had 126.0mm, so 36 years. Hello, Ken. I remember that very well, coming hard on the heels of the summer drought. I also remember the saying in that part of the world: "If the rain is from the east, it will last a day or two at least." Seems the old timers were describing that set-up quite well. - Tom. Blackmore, SW Essex. |
#13
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"Dartmoor Will" wrote in message ...
Ken how much did you get in the Morpeth floods of September 2008? Hi, Will, September 2008 4th 0.5mm 5th 56.5mm 6th 11.0mm 7th 2.5mm 7th 1.3mm Not sure where to draw the line, I didn't used to be into rainfall "events", but I think all those readings were from the same system without a break, so around 70mm. It was much heavier further north. The high totals we get in easterlies boost our wettest day to 43mm which is quite high for a rain-shadow area, I think? Ken |
#14
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On Wed, 26 Sep 2012 09:41:20 -0700 (PDT)
Tom wrote: On Wednesday, 26 September 2012 11:22:53 UTC+1, Ken Cook wrote: In this part of Teesdale, not a long way from you, with 111.1mm it has been the biggest rainfall event that I have recorded since September 1976 which had 126.0mm, so 36 years. Hello, Ken. I remember that very well, coming hard on the heels of the summer drought. I also remember the saying in that part of the world: "If the rain is from the east, it will last a day or two at least." Seems the old timers were describing that set-up quite well. When the wind is in the east, 'Tis neither good for man nor beast; When the wind is in the north, The skilful Asher goes not forth; When the wind is in the south, It blows the bait in the fishes' mouth; When the wind is in the west, Then 'tis at the very best. From http://www.rhymes.org.uk/a111-when-the-wind.htm I think my Observers Book of Weather pointed out that "rain before seven, fine before eleven" was OK in a westerly, but if rain starts when the wind is in the east it could last for 48 hrs. -- Graham Davis, Bracknell, Berks. E-mail: change 'boy' to 'man' What children say about marriage etc. - Q. What is the right age to get married? A. "No age is good to get married at. You got to be a fool to get married" - Freddie, age 6. |
#15
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On Wed, 26 Sep 2012 17:15:43 +0100
Dave Cornwell wrote: Richard Dixon wrote: On Wednesday, 26 September 2012 07:55:38 UTC+1, David Allan wrote: Just heard the weather of the last couple of days described on BBC radio as the "...worst September storms for 30 years...", which, if true, sort of answers my previous question of just how unusual is this sort of weather. what might arrive on our doorsteps for the closing months of 2012? I only had video of Peter Gibbs but no audio and was wondering what they were using to classify the "worseness". I saw a 973mb on the chart which made me wonder whether they were simply using central pressure as a proxy for "worseness"... Richard ------------------------------ My thoughts entirely Richard. What criteria were used to define "worst" September storm? Was it amount of rain and number of regions affected,low pressure, wind speed (I doubt it), population size affected. I just don't see how they could come to this conclusion other than in some subjective way. I'm not disputing it - just not sure what the criteria are for a "storm" Dave Here is the link I posted in an earlier thread on this subject. http://metofficenews.wordpress.com/2...her-to-the-uk/ And the relevant extract: The low pressure system that is affecting the UK is unusually deep for September, with the lowest air pressure recorded so far being 973mbs. To find a similarly intense low pressure system in September you need to go back to 1981, when pressures below 970mb were reported over a period of 24 hours. Like this week’s, this low pressure system brought unsettled weather as it crossed the British Isles – starting in the Isle of Man and tracking east and then north to cover Cumbria, Northumberland, eastern Scotland, Orkney and Shetland. There have been other times when pressures as low as 970mb were recorded in some parts of the British Isles in September, such as in the Isles of Scilly in 1995 and others across the far north or west of Scotland or Northern Ireland, however none were as widespread as the low that pushed across the UK in 1981. -- Graham Davis, Bracknell, Berks. E-mail: change 'boy' to 'man' What children say about marriage etc. - Q. What is the right age to get married? A. "No age is good to get married at. You got to be a fool to get married" - Freddie, age 6. |
#16
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On Wed, 26 Sep 2012 18:35:46 +0100
Graham P Davis wrote: On Wed, 26 Sep 2012 17:15:43 +0100 Dave Cornwell wrote: Richard Dixon wrote: On Wednesday, 26 September 2012 07:55:38 UTC+1, David Allan wrote: Just heard the weather of the last couple of days described on BBC radio as the "...worst September storms for 30 years...", which, if true, sort of answers my previous question of just how unusual is this sort of weather. what might arrive on our doorsteps for the closing months of 2012? I only had video of Peter Gibbs but no audio and was wondering what they were using to classify the "worseness". I saw a 973mb on the chart which made me wonder whether they were simply using central pressure as a proxy for "worseness"... Richard ------------------------------ My thoughts entirely Richard. What criteria were used to define "worst" September storm? Was it amount of rain and number of regions affected,low pressure, wind speed (I doubt it), population size affected. I just don't see how they could come to this conclusion other than in some subjective way. I'm not disputing it - just not sure what the criteria are for a "storm" Dave Here is the link I posted in an earlier thread on this subject. http://metofficenews.wordpress.com/2...her-to-the-uk/ And the relevant extract: The low pressure system that is affecting the UK is unusually deep for September, with the lowest air pressure recorded so far being 973mbs. To find a similarly intense low pressure system in September you need to go back to 1981, when pressures below 970mb were reported over a period of 24 hours. Like this week’s, this low pressure system brought unsettled weather as it crossed the British Isles – starting in the Isle of Man and tracking east and then north to cover Cumbria, Northumberland, eastern Scotland, Orkney and Shetland. There have been other times when pressures as low as 970mb were recorded in some parts of the British Isles in September, such as in the Isles of Scilly in 1995 and others across the far north or west of Scotland or Northern Ireland, however none were as widespread as the low that pushed across the UK in 1981. And here's the latest one: http://metofficenews.wordpress.com/2...k-in-30-years/ -- Graham Davis, Bracknell, Berks. E-mail: change 'boy' to 'man' What children say about marriage etc. - Q. What is the right age to get married? A. "No age is good to get married at. You got to be a fool to get married" - Freddie, age 6. |
#17
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![]() "Ken Cook" wrote in message ... "Dartmoor Will" wrote in message ... Ken how much did you get in the Morpeth floods of September 2008? Hi, Will, September 2008 4th 0.5mm 5th 56.5mm 6th 11.0mm 7th 2.5mm 7th 1.3mm Not sure where to draw the line, I didn't used to be into rainfall "events", but I think all those readings were from the same system without a break, so around 70mm. It was much heavier further north. The high totals we get in easterlies boost our wettest day to 43mm which is quite high for a rain-shadow area, I think? Ken Ah, thanks Ken. IIRC Morpeth 08 had a convective element. Will -- |
#18
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On 26/09/12 11:40, Ken Cook wrote:
"Adam Lea" wrote in message ... Snowmageddon? Hi, Adam, Most of the really big snowfalls in this area come from similar setups as early this week. March 1979 is one that springs to mind when a precipitation band stalled across NE England. There is normally at least one each winter with 25mm rain equivalent / 25cm snow . However, 111mm converted to snow would be interesting! Ken Copley, Teesdale. I wonder if 111mm rain equivalent of snow is even possible in the UK. Does anyone know what the UK record is for the greatest amount of snow in a single fall? |
#19
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On 26/09/12 17:15, Dave Cornwell wrote:
Richard Dixon wrote: On Wednesday, 26 September 2012 07:55:38 UTC+1, David Allan wrote: Just heard the weather of the last couple of days described on BBC radio as the "...worst September storms for 30 years...", which, if true, sort of answers my previous question of just how unusual is this sort of weather. what might arrive on our doorsteps for the closing months of 2012? I only had video of Peter Gibbs but no audio and was wondering what they were using to classify the "worseness". I saw a 973mb on the chart which made me wonder whether they were simply using central pressure as a proxy for "worseness"... Richard ------------------------------ My thoughts entirely Richard. What criteria were used to define "worst" September storm? Depth of low, impact from wind/rain and size of area or number of people affected were all factored in I believe. |
#20
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Adam Lea wrote:
On 26/09/12 17:15, Dave Cornwell wrote: Richard Dixon wrote: On Wednesday, 26 September 2012 07:55:38 UTC+1, David Allan wrote: Just heard the weather of the last couple of days described on BBC radio as the "...worst September storms for 30 years...", which, if true, sort of answers my previous question of just how unusual is this sort of weather. what might arrive on our doorsteps for the closing months of 2012? I only had video of Peter Gibbs but no audio and was wondering what they were using to classify the "worseness". I saw a 973mb on the chart which made me wonder whether they were simply using central pressure as a proxy for "worseness"... Richard ------------------------------ My thoughts entirely Richard. What criteria were used to define "worst" September storm? Depth of low, impact from wind/rain and size of area or number of people affected were all factored in I believe. ---------------------- Thank you Graham and Adam - I should have read the thread :-( Dave |
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