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What is this weird cloud please


Ukwoody

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Posted
  • Location: Milford Haven, Pembrokeshire
  • Weather Preferences: Extremes
  • Location: Milford Haven, Pembrokeshire

HI Can anyone tell me what sort of cloud this is please and how it is formed?      Taken just a few mins ago over Milford Haven.  It is still there though a it wider now.

Many thanks

 

ribbin cloud narrow.JPG

ribbon cloud wide.JPG

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Posted
  • Location: Wildwood, Stafford 104m asl
  • Weather Preferences: obviously snow!
  • Location: Wildwood, Stafford 104m asl

contrail, plane flying above 31000 feet, under certain conditions, contrails linger, especially when change on the way

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Posted
  • Location: Milford Haven, Pembrokeshire
  • Weather Preferences: Extremes
  • Location: Milford Haven, Pembrokeshire

Well did wonder, but none of the others have changed at all which seemed a bit weird

 

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Posted
  • Location: Kingdom of Fife: 56.2º N, 3.2º W
  • Location: Kingdom of Fife: 56.2º N, 3.2º W

Basically, contrails form when the water vapour content of burnt jet fuel condenses and then freezes in the cold upper atmosphere. These tiny ice crystals then act a seeding for super cooled atmospheric water vapour to give up heat and freeze out. If conditions are right this seeding effect continues and the trail can spread out.

Other times the contrails will be intermittent as the jet flies through different layers of atmosphere.

Contrails are a real manifestation of anthropomorphic activity unlike so called chemtrails which are the product of an overactive imagination!

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Posted
  • Location: Milford Haven, Pembrokeshire
  • Weather Preferences: Extremes
  • Location: Milford Haven, Pembrokeshire

Ok, but why only this one trail?

(Fortunately I do not suffer with that particular overactive imagination often favoured by Potheads ;-)  )

 

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Posted
  • Location: Wildwood, Stafford 104m asl
  • Weather Preferences: obviously snow!
  • Location: Wildwood, Stafford 104m asl
22 minutes ago, Ukwoody said:

Ok, but why only this one trail?

(Fortunately I do not suffer with that particular overactive imagination often favoured by Potheads ;-)  )

 

if you know time, try backtracking flight on flight radar 24? will tell you altitude and type of plane

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Posted
  • Location: East Lothian
  • Weather Preferences: Not too hot, excitement of snow, a hoolie
  • Location: East Lothian
On 4/23/2017 at 20:14, Ukwoody said:

Ok, but why only this one trail?

(Fortunately I do not suffer with that particular overactive imagination often favoured by Potheads ;-)  )

 

 

The planes will be flying at different heights and at different times of day. The air moisture content, wind direction and wind strength varies (sometimes greatly) up through the atmosphere. This contrail has been around a while as it is broad and fading. It looks like upwind/ perpendicular to the trail there could be maybe hills or something which is funnelling the winds slightly and giving this wavy pattern. Not enough to break up the streak of cloud yet but just to make it meander.  Weather folk send up balloons to take a snap shot of a vertical section of the atmopshere as it gives such a lot of info. The resulting output a tephigram, shows how the winds vary with height (on RHS) and the cloudy areas (near surface) and drier slots (like around 550Hpa). http://www.blackmountainsgliding.co.uk/groundschool/gsdocs/tg/tephigrams.pdf   This one just seems to be in a position where the local winds are giving a weird result, others are too high/low

 

ascent1.gif

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Posted
  • Location: Milford Haven, Pembrokeshire
  • Weather Preferences: Extremes
  • Location: Milford Haven, Pembrokeshire

Thanks to all off you for your input.  Jo that was a great explanation, thank you

woody

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