Does anybody know what's been causing the annoying conveyor belt of thick cirrostratus over the last 3 days. It's been generating to the SW of Britain and moving north over Ireland then NE over Scotland spoiling things for us. As if we don't have enough with the haar!
Originally Posted by: Crepuscular Ray
Difficult to say.
I suppose that can happen when an Atlantic weather system is in the process of clipping NW Scotland as it is diverted northwards and then eastwards around the blocking area of high pressure which is giving us our dry weather. That could I suppose, result in some high cloud spilling southwards into that area of high pressure in the process and thus affecting this part of the world.
However, that doesn't explain why we are also still getting that east coast haar at the same time because that haar is something which usually comes with an easterly wind and for that to be in place, the blocking high would need to be centred to the north of us when then also pushes any Atlantic weather systems to the north as well, which would be moving around the top of it.
I suppose we could ask ourselves the question of whether we are actually in a true easterly, or whether the haar is really just been brought in by a local sea breeze which had formed during the day. That is possible when the high pressure is centred right on top of here and this would allow for high cloud from weather systems moving around the high pressure to the north of it, then spilling into the area of high pressure itself.
The problem with that though is that local sea breezes only ever form during the day and then disappear during the night and so, the fact that the east coast haar has been coming in during the night means that it's can't really be getting in by what is just a local sea breeze. When you add all of that together, that leaves me a bit stumped as why that has happened.
However, I know that are likely to be members of this forum who are more knowledgeable than me in this area, and who might be able to answer that question, so I will open this one up to allow them do so.
The north of Edinburgh, usually always missing out on snow events which occur not just within the rest of Scotland or the UK, but also within the rest of Edinburgh.