Help request - clouds (on or off topic)
 

I just made a new photo to replace an old one made by dear mama.

Could some kind person tell me what type of cloud this is?
http://pictures.opcop.org.uk/new99.htm

The sky is full of this type just now and if I know what it is, I can
change the title on the page.
If there's somewhere I can look such things up to avoid bothering the ng
please do tell.

Thanks in anticipation of someone being nice :)


--
A S
http://nature.opcop.org.uk
http://pictures.opcop.org.uk

Help request - clouds (on or off topic)
 

On Wednesday, August 12, 2015 at 9:17:11 AM UTC-4, Asha Santon wrote:
I just made a new photo to replace an old one made by dear mama.

Could some kind person tell me what type of cloud this is?
http://pictures.opcop.org.uk/new99.htm

The sky is full of this type just now and if I know what it is, I can
change the title on the page.
If there's somewhere I can look such things up to avoid bothering the ng
please do tell.

Thanks in anticipation of someone being nice :)

========

Altocumulus stratiformis translucidus perlucidus.

Or, given that it is difficult to gauge altitude from a photograph, possibly high stratocumulus.

Stephen.

Help request - clouds (on or off topic)
 

Altocumulus perlucidus would do me!

Help request - clouds (on or off topic)
 

"Stephen Davenport" wrote in message
...
On Wednesday, August 12, 2015 at 9:17:11 AM UTC-4, Asha Santon wrote:
I just made a new photo to replace an old one made by dear mama.

Could some kind person tell me what type of cloud this is?
http://pictures.opcop.org.uk/new99.htm

The sky is full of this type just now and if I know what it is, I can
change the title on the page.
If there's somewhere I can look such things up to avoid bothering the ng
please do tell.

Thanks in anticipation of someone being nice :)

========

Altocumulus stratiformis translucidus perlucidus.

Or, given that it is difficult to gauge altitude from a photograph,
possibly high stratocumulus.



Probably Ac I'd say.

Will
--
http://www.lyneside.demon.co.uk/Hayt...antage_Pro.htm
Will Hand (Haytor, Devon, 1017 feet asl)
---------------------------------------------

Help request - clouds (on or off topic)
 

On Wednesday, August 12, 2015 at 9:17:11 AM UTC-4, Asha Santon wrote:
I just made a new photo to replace an old one made by dear mama.

Could some kind person tell me what type of cloud this is?
http://pictures.opcop.org.uk/new99.htm

The sky is full of this type just now and if I know what it is, I can
change the title on the page.
If there's somewhere I can look such things up to avoid bothering the ng
please do tell.

Thanks in anticipation of someone being nice :)

========

I should add, by the way, that altocumulus is the genus, stratiformis the species (meaning, as the word suggests, an extensive layer).

Translucidus and perlucidus are varieties: the former, also easily guessed, meaning translucent - such that the sun or moon may be seen through the cloud. Thick altocumulus is the variety opacus. Perlucidus is less obvious but denotes gaps between cloud cells in the layer. Literally it means something like "allowing light through".

Stephen.

Help request - clouds (on or off topic)
 

On Wednesday, August 12, 2015 at 10:10:58 AM UTC-4, wrote:
"Stephen Davenport" wrote in message
...
On Wednesday, August 12, 2015 at 9:17:11 AM UTC-4, Asha Santon wrote:
I just made a new photo to replace an old one made by dear mama.

Could some kind person tell me what type of cloud this is?
http://pictures.opcop.org.uk/new99.htm

The sky is full of this type just now and if I know what it is, I can
change the title on the page.
If there's somewhere I can look such things up to avoid bothering the ng
please do tell.

Thanks in anticipation of someone being nice :)

========

Altocumulus stratiformis translucidus perlucidus.

Or, given that it is difficult to gauge altitude from a photograph,
possibly high stratocumulus.



Probably Ac I'd say.

Will
--
http://www.lyneside.demon.co.uk/Hayt...antage_Pro.htm
Will Hand (Haytor, Devon, 1017 feet asl)
---------------------------------------------

========

Yes, I think so. It immediately looks like Ac but I couldn't entirely rule out Sc.

Stephen.

Help request - clouds (on or off topic)
 

"Stephen Davenport" wrote in message
...
On Wednesday, August 12, 2015 at 10:10:58 AM UTC-4,
wrote:
"Stephen Davenport" wrote in message
...
On Wednesday, August 12, 2015 at 9:17:11 AM UTC-4, Asha Santon wrote:
I just made a new photo to replace an old one made by dear mama.

Could some kind person tell me what type of cloud this is?
http://pictures.opcop.org.uk/new99.htm

The sky is full of this type just now and if I know what it is, I can
change the title on the page.
If there's somewhere I can look such things up to avoid bothering the
ng
please do tell.

Thanks in anticipation of someone being nice :)

========

Altocumulus stratiformis translucidus perlucidus.

Or, given that it is difficult to gauge altitude from a photograph,
possibly high stratocumulus.



Probably Ac I'd say.


Yes, I think so. It immediately looks like Ac but I couldn't entirely rule
out Sc.


Indeed not. Even outside height can be deceptive. I remember one night shift
way back in the 70s as a trainee observer; it was around dawn and I said to
my colleague that there was a bit of stratus outside. He immediately
corrected me and said I don't think so, that is cirrus s****atus at around
20000 feet! Only 19500 feet out. Air traffic control would not have been
pleased if I had reported patchy stratus. I was fooled by the fact that the
cirrus showed up dark and was moving quite fast. The CBR was no help (it
would not have recorded cirrus) as the cloud was not over it. When the sun
came up, my error became obvious :-)

Will
--
http://www.lyneside.demon.co.uk/Hayt...antage_Pro.htm
Will Hand (Haytor, Devon, 1017 feet asl)
---------------------------------------------

Help request - clouds (on or off topic)
 

On 12/08/15 14:16, Asha Santon wrote:
I just made a new photo to replace an old one made by dear mama.

Could some kind person tell me what type of cloud this is?
http://pictures.opcop.org.uk/new99.htm

The sky is full of this type just now and if I know what it is, I can
change the title on the page.
If there's somewhere I can look such things up to avoid bothering the ng
please do tell.

Thanks in anticipation of someone being nice :)


Many thanks to each and all.

With regard to altitude, I have no idea ... I don't know how to tell. If
there are two lots, I can see which is above or below but there was just
the one lot.
After a few minutes it turned into / was replaced by clear sky with odd
wispy bits.

Of course my camera tells me they're all at infinity and in the absence
of Buzz Lightyear, never beyond that :)

Thanks again though. I do appreciate your help.

--
A S
http://nature.opcop.org.uk
http://pictures.opcop.org.uk

Help request - clouds (on or off topic)
 

On Wednesday, August 12, 2015 at 10:29:13 AM UTC-4, wrote:
"Stephen Davenport" wrote in message
...
On Wednesday, August 12, 2015 at 10:10:58 AM UTC-4,
wrote:
"Stephen Davenport" wrote in message
...
On Wednesday, August 12, 2015 at 9:17:11 AM UTC-4, Asha Santon wrote:
I just made a new photo to replace an old one made by dear mama.

Could some kind person tell me what type of cloud this is?
http://pictures.opcop.org.uk/new99.htm

The sky is full of this type just now and if I know what it is, I can
change the title on the page.
If there's somewhere I can look such things up to avoid bothering the
ng
please do tell.

Thanks in anticipation of someone being nice :)

========

Altocumulus stratiformis translucidus perlucidus.

Or, given that it is difficult to gauge altitude from a photograph,
possibly high stratocumulus.



Probably Ac I'd say.


Yes, I think so. It immediately looks like Ac but I couldn't entirely rule
out Sc.


Indeed not. Even outside height can be deceptive. I remember one night shift
way back in the 70s as a trainee observer; it was around dawn and I said to
my colleague that there was a bit of stratus outside. He immediately
corrected me and said I don't think so, that is cirrus s****atus at around
20000 feet! Only 19500 feet out. Air traffic control would not have been
pleased if I had reported patchy stratus. I was fooled by the fact that the
cirrus showed up dark and was moving quite fast. The CBR was no help (it
would not have recorded cirrus) as the cloud was not over it. When the sun
came up, my error became obvious :-)

Will
--
http://www.lyneside.demon.co.uk/Hayt...antage_Pro.htm
Will Hand (Haytor, Devon, 1017 feet asl)
---------------------------------------------

==============

Observing at night often presented these kinds of problems.

At London Weather Centre the issue was exacerbated by light pollution. Oftentimes one would have merrily reported clear skies on the hour through the night only to be confronted by several oktas of thin high cirrus at dawn - which may or may not have present previously.

There was an article written a few years ago which made a case for mechanisms that caused dispersal of cirrus overnight; but I wondered if the author missed the simple point that it's simply a bugger to see at night.

As for lower cloud, we had one observer for a while who seemed only ever to observe two stratiform types - Sc at 2500' or St at a peculiarly high 2000'. In a westerly it was wise to at least look at what upstream sites with CBRs were reporting, especially LHR. He never caught on.

Stephen.

Help request - clouds (on or off topic)
 

On Wed, 12 Aug 2015 14:16:46 +0100, Asha Santon
wrote:

If there's somewhere I can look such things up to avoid bothering the ng
please do tell.

Google 'international cloud atlas' and download the pdf 'INTERNATIONAL
CLOUD ATLAS - Knmi'.

--
Alan White
Mozilla Firefox and Forte Agent.
By Loch Long, twenty-eight miles NW of Glasgow, Scotland.
Webcam and weather:- http://windycroft.co.uk/weather