1. Trailspotter

    Trailspotter Senior Member

    Parallel contrail stripes near Washington, DC, can be seen on the GOES-16 images of the day.
    Here is a link to their time-lapse: http://col.st/4kIdw
     
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  2. igoddard

    igoddard Active Member

    Yes, very good observation and point. The flight corridor happened to be right along an edge of humidity, which I noticed at that time and you can even tell that in my photos. In the first two, the area to the right (NW) looked drier, and contrails there did more evaporating than persisting, and there were no natural-looking clouds there either. But further to the left (SE) they mostly expanded. That looks to comport exactly with the humidity map you show!
     
  3. Trailblazer

    Trailblazer Moderator Staff Member

    Best morning for contrails for a while here (Hampshire, UK). First one looking southeast, second looking northwest at the same time.

    IMG_9373.JPG IMG_9395.JPG

    Long contrail at 33,000ft, short one at 37,000ft:

    IMG_9383.JPG
    IMG_9384.PNG
     
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  4. M Bornong

    M Bornong Senior Member

    A broken squiggly contrail, that pretty well matches the waves in the surrounding cloud layer. March 6 2018,1:25 pm PST over Bakersfield, CA. DSCF1299.JPG
     
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  5. Clouds Givemethewillies

    Clouds Givemethewillies Active Member

    Flying in line with the sun. KLM**, I think. Auto-adjusted colour for contrast. DSCF4865B. DSCF4863A.
    **Edit: CV660 Cargolux
     
    Last edited: Apr 5, 2018
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  6. Trailblazer

    Trailblazer Moderator Staff Member

    A big loop this morning. Hard to fit it all in a photograph but to a casual observer it looked like "they're flying in circles".

    IMG_0771.JPG IMG_0779.PNG IMG_0781.PNG IMG_0785.JPG
     
  7. SR1419

    SR1419 Senior Member

    While hanging around the North entrance to Yellowstone, I saw this. No idea who or what...there was a fourth plane that was further out in front (you can just barely see the contrail)

    IMG_4712.
     
    Last edited: Apr 22, 2018
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  8. Mick West

    Mick West Administrator Staff Member

    They seem fairly well spaced. I suspect just regular air traffic in a lucky confluence.
     
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  9. Trailblazer

    Trailblazer Moderator Staff Member

    S bend. As usual it's only the perspective that makes the turns look more dramatic than they are.

    IMG_1613.PNG

    IMG_1578.PNG
     
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  10. JesseCuster

    JesseCuster Active Member

    Contrails at dawn DSC_1353.
     
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  11. 20180520_181310. Contrail after a ski run north of Missoula Sunday
     
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  12. Trailblazer

    Trailblazer Moderator Staff Member

    Lots of distrails around recently. And especially today.

    IMG_2675.JPG
    IMG_2679.PNG


    IMG_2681.JPG IMG_2683.JPG
    IMG_2684.PNG
     
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  13. cloudspotter

    cloudspotter Senior Member

    Trail and shadow DSC_0332.JPG

    by546.
     
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  14. derwoodii

    derwoodii Senior Member

    been very traily today ah this RH at FL 34 could explain

    trails1718.PNG

    I couldn't even get in golf practice without the distraction of Kiwis going over to Perth or Adelaide


    thumbnail_IMG_20180701_151248.
     
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  15. Trailblazer

    Trailblazer Moderator Staff Member

    A pair of “Morse code” contrails this morning (the placement of the aerials was coincidental!)
    BF7DD562-637C-4F13-8556-4178169051D0.
    73DBC85B-354D-4982-A2A2-693338F8466D.
     
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  16. Marin B

    Marin B Active Member

    A contrail outside my window caught my eye because the sky was otherwise very blue. It was CA987 flying Beijing to Los Angeles at 33,000 ft. I noticed another flight from China, CZ621, flying at 35,000 ft. on the same path just a few minutes behind CA987, but there was no contrail. I snapped the 1st picture when I spotted CZ621 out my window. Then just a couple of seconds later it started leaving a trail (2nd photo). Just thought it was interesting how the two planes were on the same path just a couple of thousand feet apart in elevation, with one leaving a trail and the other not.

    Inkedone trail_LI. two trails. PEK.PNG CAN.
     
    Last edited: Jul 18, 2018
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  17. Trailblazer

    Trailblazer Moderator Staff Member

    Was that today? This is a snapshot of the humidity at 250mb (roughly 34,000ft) at 1800 UTC (11:00am California time).

    upload_2018-7-18_22-22-23.

    The humidity is quite patchy, with drier air north of San Francisco and moister air to the south. The plane was heading south, from the drier air into the more humid air.

    It's reasonable to assume that the humidity was also patchy in the vertical direction, so the contrails would "switch on" in different places depending on the altitude.
     
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  18. Marin B

    Marin B Active Member

    Yes, today just after 11am. Thanks for the info!
    Within a couple of hours the sky switched from blue to a lot of cirrus blending with persistent contrails. Seems to be a common summer pattern - blue skies in a.m., cirrus in afternoon.
     
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  19. M Bornong

    M Bornong Senior Member

    Similar conditions south of you above Bakersfield on Monday, everything above 35,000 ft. was leaving contrails, below 35,000 ft, extremely hard to even pick the planes out.

    SWA1427. SWA1427FR.

    This one flashed a reflection of sunlight, allowing me to pick him out. These two were just minutes apart, same make and model, basically the same location, just 2500 feet difference in altitude.
    SWA2401. SWA2401FR.

    AAnullschool800.
     
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  20. deirdre

    deirdre Moderator Staff Member

    P1030358.JPG

    P1030359.JPG
     
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  21. Chew

    Chew Senior Member

    88F0BA72-CB3B-4571-831C-EF4BF3A2F52D. The World War II C-53 “D-Day Doll” flying overhead in Riverside CA this morning. They take it out for a spin every now and then. Planes from that era have a distinctive sound you just don’t hear from modern prop planes. Note it still has the white and black stripes they used to try to camouflage its chemtrail sprayers.
     
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  22. Trailblazer

    Trailblazer Moderator Staff Member

    Almost looks like skywriting, but they are just contrail fragments.

    EF65A1E4-345E-43F8-8906-AA97928FBB9D.

    CA13E85D-7170-4855-9439-7AA87FA0D153.

    B1051691-3F50-4F6A-A9AA-2FE9C13DE677.

    Time from first to last photo is 23 minutes.
     
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  23. Keith Beachy

    Keith Beachy Active Member

    Invasion Stripes, used on D-Day to keep allied anti-aircraft from firing on out of the ordinary aircraft used during D-Day. Dad dropped on D-Day from an aircraft like that, spent time in a tree until the moon broke out; exposing he was 6 inches from the ground.
    Invasion Stripes, https://en.wikipedia.org/wiki/Invasion_stripes
     
  24. Trailblazer

    Trailblazer Moderator Staff Member

    [​IMG]


    A pair of parallel contrails at sunset last night. Both planes followed a very similar track a few minutes apart. The second one (left) was a couple of thousand feet higher (41000ft vs 39000ft) and the later part of its contrail dissipated.
     
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  25. Whitebeard

    Whitebeard Senior Member

    August 11th, approx 8am. Nr Builth Wells, Wales
    DSC00087.JPG DSC00088.JPG DSC00089.JPG
     
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  26. Trailblazer

    Trailblazer Moderator Staff Member

    This contrail was quite striking tonight, lit up by the sun while the lower clouds were already in shadow. Photos were taken about two minutes before official sunset.

    682C7863-7849-40BA-AEB1-9F6C21DD6DD0.
    3819D9EF-BADB-4300-909A-10C49ADC0E4A.
     
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