1. Trailspotter

    Trailspotter Senior Member

    It's called 'distrail'.
    • Agree Agree x 1
  2. Clouds Givemethewillies

    Clouds Givemethewillies Active Member

    Not cirrus, but a supercooled water cloud. eg. altostratus.
    • Agree Agree x 1
  3. Leifer

    Leifer Senior Member

    Thanks for the clarifications.
  4. Trailblazer

    Trailblazer Moderator Staff Member

    Lots of contrails over the French Alps on Tuesday, including several loops. I didn't get a good look at what was making them as it was was often hidden behind the mountains. Maybe Airbus test flight again? In the first pic if you zoom in you can see the more distant loops to the left of the mountain.

    There were circles and spirals in the sky for much of the middle of the day.

    IMG_0637.JPG IMG_0662.JPG
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  5. Skaredstiff

    Skaredstiff Member

    Nice day at Sierra at Tahoe today. Good day for contrails at various altitudes. Been up the last two days with very few visible contrails. Weather has been crystal clear and warm. Seems like a pressure change and some temp drop on the way. Weather forecasted in the next few days. Hope you aircraft trackers have fun identifying these flights. Mostly just air traffic on a day where conditions make it look sinister?
    Last edited by a moderator: Mar 16, 2017
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  6. Trailblazer

    Trailblazer Moderator Staff Member

    Lots of contrails this morning, and some striking shadows where the trails lined up with the rising sun.

    IMG_1150.JPG IMG_1162.JPG IMG_1174.JPG

    Edit to add screenshot showing the high humidity over much of the UK this morning. I'm in the red circle:

    Last edited: Mar 30, 2017
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  7. Trailblazer

    Trailblazer Moderator Staff Member

    There was an almost identical photo (bottom left) posted on Chemtrails Global Skywatch yesterday from someone living in Bracknell:


    Interesting to see the same trails from a slightly different perspective:
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  8. Trailblazer

    Trailblazer Moderator Staff Member

    Contrail shadow from my back garden a few minutes ago. The clouds are moving quite fast so it was only aligned to make the "beam" for 20-30 seconds.


    Aligned perfectly with the sun:

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  9. Clouds Givemethewillies

    Clouds Givemethewillies Active Member

    Some stonking great trails the evening! baw85q.PNG DSCF4534 baw85q.
    • Like Like x 6
  10. Trailblazer

    Trailblazer Moderator Staff Member

    Stopped on the way to the station this morning to grab this photo of two long trails and a short one:


    I didn't have time to ID the flights there and then but have just checked it out:


    The photo was taken from the red dot in Farnborough, looking just south of west (the front of the house faces pretty well due east). The two persistent trails are BY1360 and DY4275, at 35,000ft and 34,000ft respectively, and the non-persistent one is DL411, at 37,000ft.


    Not much height difference needed for a big change in the appearance of the contrails.
    • Like Like x 1
  11. deirdre

    deirdre Moderator Staff Member

    I think this is a distrail ?? on the edge of some clouds. the sun is setting so I think if it was a shadow it is on the wrong spot ?? (the dirt smudges are either my window or something with the camera up against the window)


    • Like Like x 1
  12. Mick West

    Mick West Administrator Staff Member

    Looks like a distrail, but there's also a contrail there - so it's more like the gap left by a contrail (probably aerodynamic) forming in or above a layer of clouds. It's in a very thin layer round the sides, so it gives the illusions of looking like it forms one edge of the cloud layer.
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  13. Trailblazer

    Trailblazer Moderator Staff Member

    This contrail last night spread out in quite an unusual way.


    • Like Like x 6
  14. Radapox

    Radapox New Member

    IMG_20170805_122654_HDR. Got meself a neat distrail just now. (Western Netherlands)
    • Like Like x 7
  15. Whitebeard

    Whitebeard Senior Member

    Spent the weekend at a music and astronomy festival in Builth Wells, mid Wales, snapped some nice trails and clouds while I was there.
    P8120067.JPG P8130078.JPG P8120068.JPG P8130081.JPG
    • Like Like x 4
  16. Joe

    Joe Senior Member

    DSCN0339.JPG DSCN0337.JPG LA to Orlando . Over Arizona
    • Like Like x 3
  17. JFDee

    JFDee Senior Member

    That's a textbook thunderstorm anvil ... An exhibit for the WMO cloud atlas perhaps.
    • Like Like x 1
  18. deirdre

    deirdre Moderator Staff Member


    Attached Files:

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  19. derwoodii

    derwoodii Senior Member

    not the most persistent contrail but the skiing was good at Mt Baw baw Victoria Oz looking east a plane on way to new zealand

    • Like Like x 1
  20. Trailblazer

    Trailblazer Moderator Staff Member

    One plane with a contrail and one with none at all this evening. (You might need to open the full-size pic to see the other plane: its almost exactly level with the one with the contrail, and one third of the width of the photo to the right.)


    On the left, BY1124 at 37,000ft, on the right, FR5209 at 35,000ft.

    IMG_4917.PNG IMG_4918.PNG IMG_4919.PNG
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  21. cloudspotter

    cloudspotter Senior Member

    Halo plus Lufthansa A340 Chicago - Munich

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  22. Trailspotter

    Trailspotter Senior Member

    Saudi flight SVA123 to Manchester today was put on a high-altitude hold over England due to thick fog at the destination. It was flying an unusually big racetrack pattern at 37,000 ft for nearly two hours:
    Screen Shot 2017-09-19 at 09.45.06.
    The racetrack was to the west of my location with the closest point some 20 miles away. Below are a few frames from the video that I've taken before clouds arrived:
    Screen Shot 2017-09-19 at 15.18.01.
    Screen Shot 2017-09-19 at 15.19.20.
    Screen Shot 2017-09-19 at 15.16.47.
    Sadly, the plane (Boeing 787 Dreamliner) was leaving only short contrail at the time :(

    PS The full video can be watched here.
    Last edited: Sep 19, 2017 at 1:05 PM
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  23. Trailblazer

    Trailblazer Moderator Staff Member

    Very heavy contrail coverage this morning. A rain-bearing front is due to arrive this afternoon.

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  24. Trailblazer

    Trailblazer Moderator Staff Member

    As predicted there was heavy rain yesterday afternoon, and 24 hours after that last picture there's not a trail (or cloud) in sight.


    Here's a GIF showing how the relative humidity at 250mb changed in that time, at my location (circled):

    Last edited: Sep 22, 2017 at 5:25 AM
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