Breeze..... Why does it.......

   Ok. Have I been imagining this....?

  Having lived all my life 

by the sea, ..... I think I've noticed that when high tide 

comes the breeze tends to drop. And, why does the breeze 

drop towards the evening? Naturally, I'm talking in general 

terms, on calmish days, without howling gales forecast. Any 

ideas from you meteorologists out there??    

Edited by didlydon

Author	Message Share Topic Printable Version Delicious Digg Facebook Furl Google MySpace Newsvine reddit StumbleUpon Translate Twitter Windows Live Yahoo Bookmarks Topic Search Topic Options Post Reply Create New Topic
didlydon Send Private Message Find Member's Posts Far too distracted from work Joined: 15 Oct 08 Location: Margate England Online Status: Offline Posts: 280	Post Options Post Reply Quote didlydon Report Post Quote Reply Topic: Breeze..... Why does it....... Posted: 08 Jun 10 at 7:39pm
	Ok. Have I been imagining this....? Having lived all my life by the sea, ..... I think I've noticed that when high tide comes the breeze tends to drop. And, why does the breeze drop towards the evening? Naturally, I'm talking in general terms, on calmish days, without howling gales forecast. Any ideas from you meteorologists out there?? Edited by didlydon
	Vareo 365

Skiffybob Send Private Message Find Member's Posts Visit Member's Homepage Really should get out more Joined: 04 Dec 06 Location: United Kingdom Online Status: Offline Posts: 842	Post Options Post Reply Quote Skiffybob Report Post Quote Reply Posted: 08 Jun 10 at 7:41pm
	When the tide comes in, it's full so has a snooze, and at night it goes to bed. Don't you know anything? Edited by Skiffybob
	12ft Skiff - Gordon Keeble and the Furry Fly-by AC - GBR271 - Whoosh B49 - Island Alchemy

JimC Send Private Message Find Member's Posts Visit Member's Homepage Really should get out more Joined: 17 May 04 Location: United Kingdom Online Status: Offline Posts: 6662	Post Options Post Reply Quote JimC Report Post Quote Reply Posted: 09 Jun 10 at 8:44am
	Evening: In general there is more wind high up, because the wind is slowed by friction with the surface. This slowed area is called the boundary layer. During the day the thermal effects created by the land (or sea, but to a lesser extent) cause turbulence in the boundary layer which brings breeze, and especially gusts down from higher up. This affect reduces as the land cools down in the evening. High tide? no idea. I'll go with Bob's explanation...

Laser 173312 Send Private Message Find Member's Posts Far too distracted from work Joined: 08 May 07 Location: United Kingdom Online Status: Offline Posts: 416	Post Options Post Reply Quote Laser 173312 Report Post Quote Reply Posted: 09 Jun 10 at 9:28am
	This is my understanding of sea breezes rather than gradient wind which is what you are talking about here. On shore breezes occur on sunny days because the land is heated and is warmer than the surrounding sea. So the warm air over the land rises and sucks colder air off the sea causing an on shore breeze. As evening approaches the land cools back towards the temperature of the sea so the effect diminishes and the wind drops. Later in the night the land will be colder than the sea so an offshore breeze may be generated as the now warmer air over the sea rises. In both cases at a higher altitude there will be a breeze in the opposite direction to set up a circulation so that a piece of air will go round and round some think like Onshore breeze at sea level Rise over land Offshore breeze at altitude Fall over sea back to start The tide effect on dropping the breeze I think is due to the fact that when the water comes in over the warm sand the water is heated and the sand cooled so that the temperature difference between the mainland and sea is less, hence the breeze dies. No doubt someone will know more than me

G.R.F. Send Private Message Find Member's Posts Visit Member's Homepage Really should get out more Joined: 10 Aug 08 Location: United Kingdom Online Status: Offline Posts: 4028	Post Options Post Reply Quote G.R.F. Report Post Quote Reply Posted: 09 Jun 10 at 10:05am
	Lot depends on what's on the land in front of the tide. Often as the tide comes in, in coastal towns like ours at Hythe, it brings you nearer to the buildings and as everyone who has read their tactical books knows, buildings effect the wind in front of them to the approximate of five times their height, (personally I think it's greater than five but that's the formula books are set on). So the wind does appear to increase as the tide comes in, but at the peak the combination of the waves, and any buildings present cause turbulence which the general airflow raises above and over, creating the impression that the wind is less, it remains gusty though. As to the wind always dropping in the evening, it is not always the case, we were racing(boards) last night it stayed pretty constant, in fact got up a bit now and then, but then the tide was coming in, had it been going out, I suspect the reverse would have been the case. Then there was no significant thermal activity last night, just a general weather pattern shift to the right which is also better, Southerlies are dead onshore and no matter how windy always suffer from the buildings effect close in so as it shifted a couple of degrees to the South West it cleaned up a tad, as did a canny old hand who spotted that and the tidal lee bow it presented - four bullets in fact.. Edited by G.R.F.
	https://www.ease-distribution.com/