simonjk
Well-Known Member
Hi,
Dry weather has been dominating the weather over much of the British Isles through September, thanks to high pressure which has variously been over the country or somewhere close by.
Things are going to change though, and are doing so already, as a cold front moves southwards through Scotland, and makes its way through the whole of the country by tomorrow morning.
So I thought this was a good time to highlight a change of air mass. At the moment we have a tropical air mass (of sorts) over us. Typically this would bring wet and mild weather, but because it has travelled around the high pressure it is drying out by the time it reaches the British Isles, and so we get the benefit of the warmth, but not the rain.
Behind the cold front the air mass changes to a Polar Maritime, bringing brighter skies and a mix of sunshine and showers. The showers are not going to be too heavy or widespread, and most of the country escape them tomorrow, but the change is really highlighting the fact that the weather is going to go into a more unsettled period.
As you know I am publishing a DVD called Weather Whys which is a series of short videos about the weather. I’ve uploaded the two on Tropical maritime and Polar Maritime air masses for you to watch, just to explain a little more about them.
You can see them at http://www.youtube.com/watch?v=C2POY_Jp7VE and http://www.youtube.com/watch?v=MXhY1nTa89w respectively.
I hope they are of interest, and are useful.
Best wishes,
Simon
Dry weather has been dominating the weather over much of the British Isles through September, thanks to high pressure which has variously been over the country or somewhere close by.
Things are going to change though, and are doing so already, as a cold front moves southwards through Scotland, and makes its way through the whole of the country by tomorrow morning.
So I thought this was a good time to highlight a change of air mass. At the moment we have a tropical air mass (of sorts) over us. Typically this would bring wet and mild weather, but because it has travelled around the high pressure it is drying out by the time it reaches the British Isles, and so we get the benefit of the warmth, but not the rain.
Behind the cold front the air mass changes to a Polar Maritime, bringing brighter skies and a mix of sunshine and showers. The showers are not going to be too heavy or widespread, and most of the country escape them tomorrow, but the change is really highlighting the fact that the weather is going to go into a more unsettled period.
As you know I am publishing a DVD called Weather Whys which is a series of short videos about the weather. I’ve uploaded the two on Tropical maritime and Polar Maritime air masses for you to watch, just to explain a little more about them.
You can see them at http://www.youtube.com/watch?v=C2POY_Jp7VE and http://www.youtube.com/watch?v=MXhY1nTa89w respectively.
I hope they are of interest, and are useful.
Best wishes,
Simon
![[32511]](https://ybw-data.community.forum/avatars/m/32/32511.jpg?1576058889){kind=avatar}
