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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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Here is a summary of the latest NWP output, for noon (GMT) on Saturday.
Issued 0553z, 30/09/03. ECMWF: http://www.wetterzentrale.de/pics/Recm1201.gif Strong northerlies cover the UK, with low pressure over Scandinavia and a ridge over Iceland. The ridge topples over the UK at T+144, bringing westerlies to Northern Ireland and Scotland, with northerlies elsewhere. The Icelandic low moves swiftly SE;wards to lie to the west of southern Norway at T+168, with strong to gale force NNW'lies and NW'lies over the UK. MetO: http://www.wetterzentrale.de/pics/Rukm1201.html As with the ECM run, a weak ridge lies to the NW of the UK, with the main high well to the west of the British Isles. Strong northerlies are affecting all areas. By T+144, a shallow low near Iceland deepens and moves swiftly SE'wards over Wales, bringing westerlies for southern as well as central England and northerlies or NNE'lies elsewhere. GFS: http://www.wetterzentrale.de/pics/Rtavn1081.gif A NNW'ly flow covers the UK, due to a ridge south of Iceland and low pressure to the west of Norway. The ridge moves over Ireland at T+120, with NW'lies over the UK. 850hPa temperatures range from -7C over NE Scotland to -1C over Cornwall; eastern areas from NE Scotland to East Anglia lie under sub 528dam air. Westerly gales then move over the UK at T+144, driven on by a deep low to the east of Iceland. The low deepens to the west of Norway at T+168, but the winds ease slightly over the UK. NW'lies and WNW'lies cover the UK on day 8 as the low fills slowly, followed by NW'lies for all on day 9 as another ridge begins to topple towards the UK from the NW. Day 10 sees westerlies from a new Icelandic low. GEM: http://www.wetterzentrale.de/pics/Rgem1201.gif As with the other runs, a ridge from the Atlantic high lies to the NW of the UK, this time bringing strong NNW'lies for all. The ridge moves over the UK at T+120, with NNW'lies persisting for most. 850hPa temperatures range from -3C over NE Scotland to +1C over Cornwall. T+144 sees strong to gale force NW'lies for the UK, with low pressure west of southern Norway. JMA: http://www.wetterzentrale.de/pics/Rjma1201.html The Japanese run shows a ridge to the NW and low pressure over southern Scandinavia, with strng to gale force northerlies for the UK. 850hPPa temperatures range from -4C over NW Scotland to -1C over SE England. The ridge moves over the UK at T+144, with WNW'lies for northern Scotland and Northern Ireland; the rest of the UK lies under NW'lies. By T+168 the UK is affected by strong westerlies as the result of a deep Icelandic low. Model overlay charts (GEM/GFS/JMA): http://expert.weatheronline.co.uk/da.../ens/pslv.html The chart shows high pressure to the west of the UK and low pressure over Scandinavia, with the 1015hPa isobar running from north to south over the UK. In summary, today's runs continue to show a cold spell for the weekend, followed by a high chance of wet and windy weather for most as the Icelandic Low moves SE'wards. The MetO run keeps northerlies running for an extra day at least, but the rest of the runs keep either a NW'ly or westerly flow over the UK. As ever, more runs are needed. |
#2
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In uk.sci.weather on Mon, 29 Sep 2003 at 06:53:00, Darren Prescott wrote
: In summary, today's runs continue to show a cold spell for the weekend, followed by a high chance of wet and windy weather for most Hmmm... right... -- Paul Hyett, Cheltenham, England |
#3
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![]() "Vidcapper" wrote in message ... In uk.sci.weather on Mon, 29 Sep 2003 at 06:53:00, Darren Prescott wrote : In summary, today's runs continue to show a cold spell for the weekend, followed by a high chance of wet and windy weather for most Hmmm... right... -- Paul Hyett, Cheltenham, England Ok, be honest, how many people here read Darren's Summary paragraph before the rest of it? (I do) Any chance of putting the Summary at the top? Keep up the good work Darren, Brendan |
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