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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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This maybe a tad premature given the present situation but I will admit now
that my prediction for "widespread lowland snow" this week has turned out to be a poor one. I've looked back, and at the time there was great potential and the models had been consistent and the synoptics indeed were not far out. But what happened was that the temperature was one degree higher raising the wet-bulb freezing level by 200m or so and many places got cold rain/sleet instead of snow. The trouble is that when you go for snow and this happens there is no place to hide! But why was it warmer than many runs were initially showing? I think the answer lies in our old friend SST. The air feeding into the low complex, which was perhaps a shade further west than I thought might happen, spent more time over the ocean going west over the top and warmed up in the lowest layers. It is only now as the deep cold polar air behind the upper trough comes east that we will get the widespread sub 200m wet-bulb freezing levels that I expected Tuesday/Wednesday. Ah well, I have a thick skin and I have been wrong many times before and I will be wrong again, but I won't stop trying in very difficult situations. Fortunately at least for me locally I won't be quite as wrong but then it is easier forecasting for upland areas - sometimes. Will -- |
#2
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Will Hand wrote:
This maybe a tad premature given the present situation but I will admit now that my prediction for "widespread lowland snow" this week has turned out to be a poor one. I've looked back, and at the time there was great potential and the models had been consistent and the synoptics indeed were not far out. But what happened was that the temperature was one degree higher raising the wet-bulb freezing level by 200m or so and many places got cold rain/sleet instead of snow. The trouble is that when you go for snow and this happens there is no place to hide! But why was it warmer than many runs were initially showing? I think the answer lies in our old friend SST. The air feeding into the low complex, which was perhaps a shade further west than I thought might happen, spent more time over the ocean going west over the top and warmed up in the lowest layers. It is only now as the deep cold polar air behind the upper trough comes east that we will get the widespread sub 200m wet-bulb freezing levels that I expected Tuesday/Wednesday. Ah well, I have a thick skin and I have been wrong many times before and I will be wrong again, but I won't stop trying in very difficult situations. Fortunately at least for me locally I won't be quite as wrong but then it is easier forecasting for upland areas - sometimes. Will Will - I know sod all about the atmosphere compared to you but I went for snow too based on years of synoptic watching and gut feeling. It was very borderline. There was RASN in that rain but it didnt quite come off. Best be prepared I say and leave the likes of us disappointed, than a 'surprise' dump of snow make us all feel like idiots. Mind now whats going to happen in the next 48 hours! I'll shake the glass bowl up with snow in this time. Phil -- Guildford, Surrey www.layton.me.uk/meteo.htm |
#3
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dont worry will.
CF forecast on sunday was still forecasting snow in london on sunday and local forecasts on monday like you said , just 1c. PS lowland southerners might get the turn again this weekened/monday? Will Hand wrote: This maybe a tad premature given the present situation but I will admit now that my prediction for "widespread lowland snow" this week has turned out to be a poor one. I've looked back, and at the time there was great potential and the models had been consistent and the synoptics indeed were not far out. But what happened was that the temperature was one degree higher raising the wet-bulb freezing level by 200m or so and many places got cold rain/sleet instead of snow. The trouble is that when you go for snow and this happens there is no place to hide! But why was it warmer than many runs were initially showing? I think the answer lies in our old friend SST. The air feeding into the low complex, which was perhaps a shade further west than I thought might happen, spent more time over the ocean going west over the top and warmed up in the lowest layers. It is only now as the deep cold polar air behind the upper trough comes east that we will get the widespread sub 200m wet-bulb freezing levels that I expected Tuesday/Wednesday. Ah well, I have a thick skin and I have been wrong many times before and I will be wrong again, but I won't stop trying in very difficult situations. Fortunately at least for me locally I won't be quite as wrong but then it is easier forecasting for upland areas - sometimes. Will |
#4
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On Feb 17, 9:23*pm, "Will Hand" wrote:
This maybe a tad premature given the present situation but I will admit now that my prediction for "widespread lowland snow" this week has turned out to be a poor one. I've looked back, and at the time there was great potential and the models had been consistent and the synoptics indeed were not far out. But what happened was that the temperature was one degree higher raising the wet-bulb freezing level by 200m or so and many places got cold rain/sleet instead of snow. The trouble is that when you go for snow and this happens there is no place to hide! But why was it warmer than many runs were initially showing? I think the answer lies in our old friend SST. The air feeding into the low complex, which was perhaps a shade further west than I thought might happen, spent more time over the ocean going west over the top and warmed up in the lowest layers. It is only now as the deep cold polar air behind the upper trough comes east that we will get the widespread sub 200m wet-bulb freezing levels that I expected Tuesday/Wednesday. Ah well, I have a thick skin and I have been wrong many times before and I will be wrong again, but I won't stop trying in very difficult situations.. Fortunately at least for me locally I won't be quite as wrong but then it is easier forecasting for upland areas - sometimes. Will -- Well said. It's just the way it goes. welcome to the club. *)) |
#5
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![]() This maybe a tad premature given the present situation but I will admit now that my prediction for "widespread lowland snow" this week has turned out to be a poor one. I've looked back, and at the time there was great potential and the models had been consistent and the synoptics indeed were not far out. But what happened was that the temperature was one degree higher raising the wet-bulb freezing level by 200m or so and many places got cold rain/sleet instead of snow. The trouble is that when you go for snow and this happens there is no place to hide! But why was it warmer than many runs were initially showing? I think the answer lies in our old friend SST. The air feeding into the low complex, which was perhaps a shade further west than I thought might happen, spent more time over the ocean going west over the top and warmed up in the lowest layers. It is only now as the deep cold polar air behind the upper trough comes east that we will get the widespread sub 200m wet-bulb freezing levels that I expected Tuesday/Wednesday. Ah well, I have a thick skin and I have been wrong many times before and I will be wrong again, but I won't stop trying in very difficult situations. Fortunately at least for me locally I won't be quite as wrong but then it is easier forecasting for upland areas - sometimes. Will, I know you went for it and it was a very difficult situation, one many would not have even attempted, so good on you for that! I will always be looking out for your forecasts with interest, despite my moans and groans ![]() It's just bugged me this Winter being the coldest for 30 years and at my altitude I really thought I would have had at least one heavy fall by now! The biggest fall of just 6 cms in January is much lower than we get in most mild winters! What was more depressing was your snowy forecast, coupled with the fact Philip mentioned last weekend this being a similar situation to 1968 when we had shed loads of the stuff ![]() I really thought we would get a big one this week but so far zilch! Temperature really struggled today too, around 1.1c at best but ppn was just too light. The temperature has started falling in the last hour around 0.2c now and with light to moderate snow falling it's finally settling. I think for this area it's been one of those Winter's where we've just missed out on the heavy snow as I sure we will tomorrow, although it won't be too far away I suspect. Anyway keep up the good work! You get far more right than you get wrong, already looking forward to you next one ![]() Graham |
#6
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![]() "Dawlish" wrote in message ... On Feb 17, 9:23 pm, "Will Hand" wrote: This maybe a tad premature given the present situation but I will admit now that my prediction for "widespread lowland snow" this week has turned out to be a poor one. I've looked back, and at the time there was great potential and the models had been consistent and the synoptics indeed were not far out. But what happened was that the temperature was one degree higher raising the wet-bulb freezing level by 200m or so and many places got cold rain/sleet instead of snow. The trouble is that when you go for snow and this happens there is no place to hide! But why was it warmer than many runs were initially showing? I think the answer lies in our old friend SST. The air feeding into the low complex, which was perhaps a shade further west than I thought might happen, spent more time over the ocean going west over the top and warmed up in the lowest layers. It is only now as the deep cold polar air behind the upper trough comes east that we will get the widespread sub 200m wet-bulb freezing levels that I expected Tuesday/Wednesday. Ah well, I have a thick skin and I have been wrong many times before and I will be wrong again, but I won't stop trying in very difficult situations. Fortunately at least for me locally I won't be quite as wrong but then it is easier forecasting for upland areas - sometimes. Will -- Well said. It's just the way it goes. welcome to the club. *)) Yet Joe B got a remarkable double and you don't have a good word to say about him. By the way just postd in the Glenn Beck show commercial break |
#7
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Will,
I think your forecast was excellent, I just assumed you had made a typing error with the date, have you seen the latest for Monday 22nd from the GFS? http://expert.weatheronline.co.uk/da...59ff6e9 4f59a http://expert.weatheronline.co.uk/da...96e4520 f585a |
#8
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On 17 Feb, 21:23, "Will Hand" wrote:
This maybe a tad premature given the present situation but I will admit now that my prediction for "widespread lowland snow" this week has turned out to be a poor one. I've looked back, and at the time there was great potential and the models had been consistent and the synoptics indeed were not far out. But what happened was that the temperature was one degree higher raising the wet-bulb freezing level by 200m or so and many places got cold rain/sleet instead of snow. The trouble is that when you go for snow and this happens there is no place to hide! But why was it warmer than many runs were initially showing? I think the answer lies in our old friend SST. The air feeding into the low complex, which was perhaps a shade further west than I thought might happen, spent more time over the ocean going west over the top and warmed up in the lowest layers. It is only now as the deep cold polar air behind the upper trough comes east that we will get the widespread sub 200m wet-bulb freezing levels that I expected Tuesday/Wednesday. Ah well, I have a thick skin and I have been wrong many times before and I will be wrong again, but I won't stop trying in very difficult situations. Fortunately at least for me locally I won't be quite as wrong but then it is easier forecasting for upland areas - sometimes. Will -- No worries Will, always enjoy your forecasts, even on the rare occasion when it goes wrong. |
#9
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On Feb 17, 9:23*pm, "Will Hand" wrote:
This maybe a tad premature given the present situation but I will admit now that my prediction for "widespread lowland snow" this week has turned out to be a poor one. I've looked back, and at the time there was great potential and the models had been consistent and the synoptics indeed were not far out. But what happened was that the temperature was one degree higher raising the wet-bulb freezing level by 200m or so and many places got cold rain/sleet instead of snow. The trouble is that when you go for snow and this happens there is no place to hide! But why was it warmer than many runs were initially showing? I think the answer lies in our old friend SST. The air feeding into the low complex, which was perhaps a shade further west than I thought might happen, spent more time over the ocean going west over the top and warmed up in the lowest layers. It is only now as the deep cold polar air behind the upper trough comes east that we will get the widespread sub 200m wet-bulb freezing levels that I expected Tuesday/Wednesday. Ah well, I have a thick skin and I have been wrong many times before and I will be wrong again, but I won't stop trying in very difficult situations.. Fortunately at least for me locally I won't be quite as wrong but then it is easier forecasting for upland areas - sometimes. Will -- Never mind Will. You kept everyone entertained on this ng, At 10 days the track of a depression is always a bit ifish to a few hundred km. I seem to remember Darren saying that the depression would drag in some warmer air. So congrats to him. But, as you indirectly point out, although it is a big depression, it cannot displace the cold continental air while it is on its present track. It just gives a little bite. So many will still see snow. Using the word 'widespread' though is very dodgy. Len Wembury, SW Devon |
#10
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![]() "Len Wood" wrote in message ... On Feb 17, 9:23 pm, "Will Hand" wrote: This maybe a tad premature given the present situation but I will admit now that my prediction for "widespread lowland snow" this week has turned out to be a poor one. I've looked back, and at the time there was great potential and the models had been consistent and the synoptics indeed were not far out. But what happened was that the temperature was one degree higher raising the wet-bulb freezing level by 200m or so and many places got cold rain/sleet instead of snow. The trouble is that when you go for snow and this happens there is no place to hide! But why was it warmer than many runs were initially showing? I think the answer lies in our old friend SST. The air feeding into the low complex, which was perhaps a shade further west than I thought might happen, spent more time over the ocean going west over the top and warmed up in the lowest layers. It is only now as the deep cold polar air behind the upper trough comes east that we will get the widespread sub 200m wet-bulb freezing levels that I expected Tuesday/Wednesday. Ah well, I have a thick skin and I have been wrong many times before and I will be wrong again, but I won't stop trying in very difficult situations. Fortunately at least for me locally I won't be quite as wrong but then it is easier forecasting for upland areas - sometimes. Will -- You should worry - I got everyone to call off their golf today ,on the best day of the winter in these parts! It is very frustrating though that it always seems to go 1-2C warmer than expected, never the other way. I don't know why they don't do all the clever stuff then add one degree for luck! Dave |
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