This one caught my eye on a bike ride this morning. As you can hopefully tell from the phone photo it appears to be a short section of aerodynamic trail, then a short gap followed by engine contrails.
What was surprising is that the plane was only just over 25,000 feet.
![image.jpeg image.jpeg](https://www.metabunk.org/attachments/image-jpeg.17003/)
Both the aerodynamic and engine contrails persisted for quite a while.
There's quite a deep low pressure over the UK at the moment with relatively cold air, -55C at 300mb
![image.gif image.gif](https://www.metabunk.org/data/attachments/16/16368-87c36e7d555556f204b852421b7acfcb.jpg)
Planes at higher altitudes were mostly leaving very short trails, and the RH forecast at 300mb was very low, so there must have been quite a shallow layer of cold and humid air.
(My location is about 35 miles west-southwest of London)
What was surprising is that the plane was only just over 25,000 feet.
Both the aerodynamic and engine contrails persisted for quite a while.
There's quite a deep low pressure over the UK at the moment with relatively cold air, -55C at 300mb
![image.gif image.gif](https://www.metabunk.org/data/attachments/16/16368-87c36e7d555556f204b852421b7acfcb.jpg)
Planes at higher altitudes were mostly leaving very short trails, and the RH forecast at 300mb was very low, so there must have been quite a shallow layer of cold and humid air.
![image.gif image.gif](https://www.metabunk.org/data/attachments/16/16369-a42e4d8872c81136de04d84ec3c3004c.jpg)
(My location is about 35 miles west-southwest of London)