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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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Not surprisingly, our power failed for about an hour, it just
came back on again. Listening to the wind, and looking out at the trees whopping about, I am full of admiration for the engineers who have to go out there in this weather to fix the power supply. Anne |
#2
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On Monday, March 9, 2015 at 10:30:04 PM UTC, Anne B wrote:
Not surprisingly, our power failed for about an hour, it just came back on again. Listening to the wind, and looking out at the trees whopping about, I am full of admiration for the engineers who have to go out there in this weather to fix the power supply. Anne Wind reached Storm force 10 in Stornoway and a few other places in N. Scotland. Only a yellow warning to be aware from UKMO again though. Obviously they think that folk up there are made of tougher stuff and don't need an orange warning to be told to be prepared. Len down south |
#3
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On Mon, 9 Mar 2015 16:40:39 -0700 (PDT), Len Wood
wrote: Only a yellow warning to be aware from UKMO again though. Some years ago, and I copied the correspondence to this group, I took issue with the MO over their warning policy pointing out that a 'yellow' for 25mm of rain for this area would probably warrant an 'amber' or even 'red' for somewhere like Essex. I think they conceded the point but, for consistency, applied the same criteria over the whole of the UK. Seemed a bit daft to me, but then lots of things do. -- Alan White Mozilla Firefox and Forte Agent. By Loch Long, twenty-eight miles NW of Glasgow, Scotland. Webcam and weather:- http://windycroft.co.uk/weather |
#4
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On Tue, 10 Mar 2015 08:49:29 +0000, Alan
wrote: Some years ago, and I copied the correspondence to this group, I took issue with the MO over their warning policy pointing out that a 'yellow' for 25mm of rain for this area would probably warrant an 'amber' or even 'red' for somewhere like Essex. I think they conceded the point but, for consistency, applied the same criteria over the whole of the UK. Seemed a bit daft to me, but then lots of things do. The warning level is based on impacts rather than thresholds on meteorological parameters. A case in point was the amber rain warning last week, whereby the amber area was different to the area that was forecast to receive the most rainfall. This was because the impact from the rainfall was assessed to be higher in that different area - namely where runoff from the rainfall (and effects arising from it - such as landslides) would affect populated areas and well-used roads. 200mm of rain in Essex would be very likely to have a much bigger impact there than in the north-west highlands (think about the Tewkesbury area in 2007), so would probably have warranted a red warning. I can think of other examples - but the message I am trying to convey is that it should be the impact rather than the actual meteorological values that is important - and the warning system reflects this. -- Freddie Pontesbury, Shropshire 102m AMSL http://www.hosiene.co.uk/weather/ https://Twitter.com/PontesburyWx for hourly reports |
#5
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Obviously they think that folk up there are made of tougher
stuff and don't need an orange warning to be told to be prepared. Len Thanks, Len. Yes, I have been explicitly told by a Met Office bod that they might not issue a warning for 60mph winds in winter in the north of Scotland, while the same wind strength in southern England in summer would certainly trigger a warning. That's perfectly fine as far as I am concerned. However it didn't answer my question, which related to apparent inconsistencies in warnings in the same area in less than 2 days. Tomorrow's maximum wind is now forecast to be 25 mph gusting 44. No warnings. Anne |
#6
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On Tue, 10 Mar 2015 18:37:27 -0000, "Anne B" wrote:
Tomorrow's maximum wind is now forecast to be 25 mph gusting 44. No warnings. Gusts to 44 don't have enough impact to warrant issue of a warning. Especially in Scotland in the winter. -- Freddie Pontesbury, Shropshire 102m AMSL http://www.hosiene.co.uk/weather/ https://Twitter.com/PontesburyWx for hourly reports |
#7
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Tomorrow's maximum wind is now forecast to be 25 mph gusting
44. No warnings. Gusts to 44 don't have enough impact to warrant issue of a warning. Especially in Scotland in the winter. No. I would certainly not expect a warning for a maximum speed of 44 mph. Anne |
#8
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On Tue, 10 Mar 2015 16:43:39 +0000, Freddie wrote:
I can think of other examples - but the message I am trying to convey is that it should be the impact rather than the actual meteorological values that is important - and the warning system reflects this. I think we're agreed. -- Alan White Mozilla Firefox and Forte Agent. By Loch Long, twenty-eight miles NW of Glasgow, Scotland. Webcam and weather:- http://windycroft.co.uk/weather |
#9
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I can think of other examples - but the message I am trying
to convey is that it should be the impact rather than the actual meteorological values that is important - and the warning system reflects this. I think we're agreed. I agree that part of the assessment of a warning should be the extent to which the expected weather deviates from the average, or norm, for the area affected. However I am not sure that the number of people affected should be any part of the assessment undertaken by the MetO. For each of the affected individuals, the effect is every bit as great regardless of how many others are in the same plight. One would have thought that the emergency services, generally speaking, are aware of roughly how many people live where, and hence are capable of assessing for themselves the likely demands on them resulting from a weather event. But perhaps I assume too much. None of which addresses my actual question (in the 'What triggers a custard warning?' thread here), which is why a forecast wind event triggered a warning starting at the time when the wind rose above 12 mph gusting 24, but a forecast ***for the same area*** two days later of 24 mph gusting 46 did not. Anne |
#10
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On Tue, 10 Mar 2015 16:43:39 +0000, Freddie wrote:
I can think of other examples - but the message I am trying to convey is that it should be the impact rather than the actual meteorological values that is important - and the warning system reflects this. I agree and enlarging on my earlier reply, it looks as though the criteria have changed since I discussed it with them in February 2008. What your saying is more or less what I was asking for then but at that time in response to my criticism:- quote from MO In general you are correct that we do only issue warnings according to criteria and apply the same criteria for all areas of the U.K. for consistency. /quote from MO Don't forget, this was Feb 2008. -- Alan White Mozilla Firefox and Forte Agent. By Loch Long, twenty-eight miles NW of Glasgow, Scotland. Webcam and weather:- http://windycroft.co.uk/weather |
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