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ASPERITAS, The CAS Cloud

ASPERITAS, The CAS Cloud

Forums The Cloud Forum ASPERITAS, The CAS Cloud

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    • #286960
      Michael Lerch avatarMichael
      Participant

      A separate thread on, for and about the CAS identified cloud now  officially known as ..Asperitas,,thanks to  our founder Gavin Pretor-Pinney,strikes me as worthy of a try. Photos would be my main contribution. I live in Phoenix Az, the Upper Sonoran Desert.We have around 275 days a year of ..blue sky. When we do have weather it tends to be quick in passing.At a very local place, my house,,a good rain is one that lasts half an hour. So the systems rush through with much hurly burly. That speed and energy tends to create Asperitas  somewhere in the Valley as a system passes through. I enjoy the challenge of spotting the phenomena.

      Asperitas at dawn

      jan2317b0410

      A  Close Up

      jan2317b0411

    • #287040
      Hans Stocker avatarHans Stocker
      Participant

      Thanks Michael, for the initiative to give asperitas its own topic on the forum in a great start. It is only one month and two weeks ago that Geoff LB reported that asperitas has become mainstream. That might be in the sense of common knowledge, but not in the sense of its appearance.

      I hope for a lot of different contributions and I hope you don’t want too limit it to only clear cases, Michael. There are also cases where one doubts whether it is asperitas or not. There are so many different kind of appearances that they are worth to discuss imho. For instance your recent ‘half half” on the  Colour Thread IV (which I think it is).

      What to think of this one. Is this asperitas giving the eye?

      2018-03-20 ev Wolken_0074 ac klein

      Any opinions?

    • #287135
      Michael Lerch avatarMichael
      Participant

      So far Hans, I’ve seen Asperitas Undulatus, Laconusus, and Radius here,with undulatus the most common. In any case, there has to be enough to hang your hat on. Your shot offers Undulatus  yet Im not seeing Asperitas.  For Aperitas I think in terms of a field or large area where redundant waves of of agitation are seen. Looking at the clouds upside down for verifying ,,needs larger sampling to see the waves.

      Below is shot of what I call”Speckled Asperitas.” Light making it through the clouds to freckle their appearance adds  even more to these surreal clouds…imho.

      jan3116b2795

    • #287202
      Hans Stocker avatarHans Stocker
      Participant

      Michael, I agree your Speckled Asperitas is a beauty. I assume the layer of clouds is relatively thin?

      I agree also with the analysis of the asperitas giving the eye. This was more a cut-out with some interesting features (to me). Here is larger sampling that shows a lot of lenticulars but with irregular undulating in it. I am curious what your opinion is on a wider view.

      2018-03-20 ev Wolken_0076 ac klein

    • #287408
      Michael Lerch avatarMichael
      Participant

      Looks like you even have Pileus or Velum going on there Hans. I’d say you captured some turbulent cloud there and the lenticular are coming apart from the turbulence. But again I need more to see in order to say Asperitas.

      Arizona Asperitas#104

      dec0517b8932

    • #287484
      Patricia L Keelin avatarKeelin
      Participant

      Thank you for launching this great topic, Michael! It’s off to a splendid start already and should draw many contributors who enjoy the rollercoaster rides of Asperitas. Wouldn’t be surprised if this calls for dramamine!

      And Hans, the images you’ve posted so far have much of the feeling I associate with Asperitas, so regardless of whether or not they meet classification parameters, they are exciting to see here.

      I haven’t see many instances of Asperitas locally, so hope a repost of one of my favorites is acceptable here. You and Hans might recognize a portion of it as The Mermaid’s Tresses from one of the B&W volumes.

      Asperitas & GGB_croppedAsperitas Over San Francisco Bay

    • #287557
      Hans Stocker avatarHans Stocker
      Participant

      Michael: unfortunately no wider view of my suspect. Indeed a lot lenticular. What makes it a bit asperitas-like for me are the irregular waves so typical for asperitas. I conclude: coincidence in a lenticular undulating scenery. It just lasted less than half an hour I remember.

      Keelin: that is a fantastic picture over Francisco Bay! The day it got published I complemented you with it on the gallery. I also saw your picture not so long ago in one of the Somewhat Occasional Newsletters from CAS. It is a surprise you took from this the mermaids tresses. Wonderful.

      Just today we had an asperitas event in the midst of some weather changes. No doubt about  this one imho. I have a series in which one can see loose patches of asperitas and also phases of dissipating.

      2018-07 Wolken_0318-2

    • #287558
      Hans Stocker avatarHans Stocker
      Participant

      Here a detail I like in a part of the sky where the asperitas was already more or less vanishing. Just some features of asperitas are left over.

      2018-07 Wolken_0288-2

    • #287561
      Hans Stocker avatarHans Stocker
      Participant

      And this strange cloud structure heralded the arrival of the asperitas. I like to share it for its strangeness. I also saw some suspect asperitas-features in this strange cloud. That might have been wishful thinking but what followed was asperitas indeed.

      2018-07 Wolken_0267-2

       

    • #287581
      Howard Brown avatarhygge
      Participant

      Michael, Hygge is pleased with your initiating this thread, not least for the marketing of CAS. And I think you have asperitas to the T in your photos.

      Hygge has never observed asperitas, but I seem to remember one photo in nearby Dorset, UK, so no excuses.

    • #287608
      Michael Lerch avatarMichael
      Participant

      Thanks hygge!, I hope you witness Asperitas soon. It seems to me, if there are two layers of cloud overhead that improves the chances of Asperitas. Of course one can’t see two layers if the lower one is not transparent enough. Big Sky  gives an advantage because if the upper layer ,say a alto stratus, is expansive enough the lower layer takes up only a portion of the sky in comparison , again making it easier to spot the phenomena. Its always easier to identify Asperitas from a distance than when its overhead. When its overhead its more difficult to identify the ” roll” of the waves, the peaks and valley of the wave action. At a distance just look at it upside down and you will know. I love the look on folks’ face when they do look at Asperitas upside down..” oh wow, now I see It!”

      Arizona Asperitas#105

      jan2017b0184

    • #287666
      Hans Stocker avatarHans Stocker
      Participant

      Nice knowing about the layers Michael. I checked my series of yesterday. Here is a overview of patches of asperitas on a lower layer and somewhat higher there seems to be a stratus layer.

      Oh and yes, I agree asperitas is better recognized looking form an angle than overhead. Overhead they don´t betray their forms so easy while looking at an angle the shapes and shadows give them their special appearance.

      2018-07 Wolken_0287-2

    • #287667
      Hans Stocker avatarHans Stocker
      Participant

      But I especially love the details…

      2018-07 Wolken_0298-2

    • #287762
      Michael Lerch avatarMichael
      Participant

      Yes,Lighting is so critical to Asperitas. It helps to have some making it thru the clouds imho. I’ve learned to shoot Asperitas somewhat flat,,that is to say,,not with contrast dialed up. Details in the shadows get lost very easily with Asperitas. Dial down the contrast will get the details in the shadows and when I process the picture, I control how much contrast I bring back to the photo.

      Arizona Asperitas#106

      jan2017b0185

    • #287813
      Hans Stocker avatarHans Stocker
      Participant

      I agree Michael, too much contrast might spoil details. It is a matter of fine tuning.

      I am getting spoiled over here. After my former asperitas event even two times yesterday. Too much to share at once. The second appearance of asperias made me think of he rather lenticular situation I posted above. To test the statement by Michael about hardly recognizing asperitas overhead versus asperitas seen at a lower angle, I made these two shots (among others).

      2018-07 Wolken_0356-4

      Overhead

       

    • #287814
      Hans Stocker avatarHans Stocker
      Participant

      At the same time

      2018-07 Wolken_0357-2

      Somewhere else in the sky as seen at a lower angle

    • #287929
      Michael Lerch avatarMichael
      Participant

      Heres a shot of Asperitas getting shredded by the winds.,,blown apart!

      Arizona Asperitas #107

      jan1317b9904

    • #287974
      Hans Stocker avatarHans Stocker
      Participant

      Yes very typical cambers Michael. Love them.

      Here is just a patch of asperitas in al ower layer of clouds and..

      2018-07 Wolken_0270-2

      And somewhat later already dissipating

      2018-07 Wolken_0273-2

    • #288126
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#108

      mar0616b3626

    • #288154
      Hans Stocker avatarHans Stocker
      Participant

      2018-07 Wolken_0342-3

      This was also part of Lenticularscape ( Cloudscapes Volume II).

    • #288325
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#109

      mar0616b3640

    • #288386
      Hans Stocker avatarHans Stocker
      Participant

      2018-07 Wolken_0361-2

      A different kind of appearance

    • #288486
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#110

      dec0517b8943

    • #288543
      Hans Stocker avatarHans Stocker
      Participant

      2018-07 Wolken_0349-2

      Asperitas on a lenticular day. Love these lines.

    • #288680
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#111

      jan2217b0335

    • #288718
      Hans Stocker avatarHans Stocker
      Participant

      From the archives. I remember to have posted some of the same series in the B&W threads.

      2017-07-19 Cum_0006 asr klein

      Any opinions on this one?

    • #288833
      Michael Lerch avatarMichael
      Participant

      Hans,,Looks like the winds are shredding the clouds but, Asperitas? sure why not?

      Below is a dawn shot of Asperitas as it literally split in two!.Winds!

      Arizona Asperitas#112

      may0616b5139

    • #288838
      Patricia L Keelin avatarKeelin
      Participant

      Such beautifully dramatic shots, Michael and Hans! Especially welcome to see as skies have been fairly cloudless here these past few days.

    • #288906
      Hans Stocker avatarHans Stocker
      Participant

      Nice streets on #112 Michael. Too much boring blue skies over here too Keelin.

      Next one is one of my first encounters from the archives. It was a nice summer day with a lot of people going to the beach. At the moment I took this picture a lot were already gone or busy fleeing, while I was enjoying this dramatic sky with a hint of asperitas in it coming from the sea foreboding a change of weather.

      2015-07-05 Asperatus_0085 ns30-222 klein

    • #289207
      Hans Stocker avatarHans Stocker
      Participant

      2017-08-22 Parhelic_0053 B&W asr klein

      Vista

    • #289353
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#113

      jan3116a2784

    • #289567
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#114

      jan1917b0139

    • #290087
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#115

      aug2716b6781

    • #290536
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#116

      aug0715b8045

    • #291147
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#117

      nov1717b8517Asp

    • #291165
      Patricia L Keelin avatarKeelin
      Participant

      Thank you, Hans and Michael, for all the above. Such beautifully captured cloud formations, each one with its own personality, each one deserving applause. I’d like to be one of those birds on the wire!

    • #291456
      Michael Lerch avatarMichael
      Participant

      Ha!, Keelin I don’t know which was more amazing , the cloud show  or that there were so many different types of birds watching it.

      Arizona Asperitas#118

      nov1717b8600Asp

       

    • #291699
      Hans Stocker avatarHans Stocker
      Participant

      Love the birds on the wire Michael. Great capture (and also others by the way).

      2018-03-03 Asperitas_0095-2

      Slightly Transparent

    • #291968
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#119

      mar0616b3715

    • #292026
      Hans Stocker avatarHans Stocker
      Participant

      Haarlem Asperitas

      2018-07 Wolken_0308-2

    • #292945
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#120

      dec0517b8924

    • #293013
      Hans Stocker avatarHans Stocker
      Participant

      2018-06 Wolken_0220-3

      This one was for free

    • #293577
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#121

      dec2215b1672Asp

    • #293668
      Hans Stocker avatarHans Stocker
      Participant

      I keep going back to the blues of #120 Michael. Very nice.

      2018-06 Wolken_0196-4

    • #294141
      Michael Lerch avatarMichael
      Participant

      I like that shot Hans. Nice composition

      Arizona Asperitas#122

      jan0918a0243

    • #294248
      Hans Stocker avatarHans Stocker
      Participant

      Thanks Michael. Love the lightness in #122. Here is one that is the opposite.

      2018-03-03 Asperitas_0093 s1h55c23 c klein

      Beware…

    • #294874
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#123  an example of asperitas lacunosus

      july3018b4200

    • #295322
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#124

      Cumulus forming around Red Mountain is pulled up by the overhead passing of Asperitas.

      jan2017b0219

    • #296211
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas# 125

      dec0517b9244

    • #296827
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#126

      dec3016b9576

    • #298540
      Hans Stocker avatarHans Stocker
      Participant

      Michael, your cumulus over Red Mountain is very peculiar. It really looks pulled up as you wrote.

      Here’s a very recent one in black and white.

      2018-09 Charigny_0171-2

    • #298760
      Hans Stocker avatarHans Stocker
      Participant

      And next a recent one in color. I must say I am rather fond of this one. Can’t wait to share it.

      2018-09 Charigny_0182-3

    • #298842
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas #127

      april1016a4463

    • #299140
      Hans Stocker avatarHans Stocker
      Participant

      2018-09 Charigny_0181-2

      French Asperitas

    • #299462
      Hans Stocker avatarHans Stocker
      Participant

      2018-09 Charigny_0177-2

      French Again

    • #300343
      Hans Stocker avatarHans Stocker
      Participant

      Another French asperitas, showing undulatus between the larger asperitas waves. The appearence of these undulating smaller parts in between the larger lines struck me. Ever seen that way?

      2018-09 Charigny_0193-2

      Squared Undulatus

    • #301165
      Michael Lerch avatarMichael
      Participant

      Looks like you had a great time in France, Hans. I think if you look closely you’ll  see undulations within undulations in a lot of Asperitas shots.

      Heres an easy going Asperitas shot.

      Arizona Asperitas# 128

      jan2217b0360

    • #301211
      Hans Stocker avatarHans Stocker
      Participant

      Yes I had Michael. Particularly the day that started with asperitas and gradually became lenticular with exploding Holmboe and all kinds of strange lenticular-like shapes like a Chicken Abductee or a Talking Sorting Hat. It took from 9:00 until 11:15.  On the gallery I posted two pics of the same scenery taken with an hour in between on which you can see the two different phases.

      2018-09 Charigny_0203-2

      Asperitas Phase

    • #302085
      Michael Lerch avatarMichael
      Participant

      Fronts either coming in or  retreating sometimes provide for the multi-layers of wind not all going in the same direction..which produces great displays as the orientation of wind direction changes over the day. You captured a pretty neat day Hans!

      Another shot showing the physics  that produce Asperitas, existing over two sets of cloud.

      Arizona Asperitas #129

      mar1418a1662Asp

    • #302170
      Hans Stocker avatarHans Stocker
      Participant

      Yes, you are right Michael, it was a pretty neat day. The show lasted three or four hours. The asperitas was followed in that timeframe by lenticular formation with seemingly some asperitas characteristics leftover. I posted some of those in the Color Thread, for example my favorite ‘Cloudshow’, ‘Soft Clouds’ and the ones with Holmboe. Ever seen something like Cloudshow?

      Nice to see two sets of clouds with asperitas on your Arizona Asperitas #129.

      2018-09 Charigny_0158-2

      Asperitas Phase #2

       

    • #302217
      Patricia L Keelin avatarKeelin
      Participant

      Love the photos of Asperitas being collected here, Michael and Hans. Layered emotions, subtle mood shifts – poetry in motion! – all captured with keen eyes for composition. Kudos to you both! Send some of those wavy winds my way, if you can?

    • #302558
      Hans Stocker avatarHans Stocker
      Participant

      Thank you Keelin. I know for sure they will come your way too to audition for your camera. The wind already picked up your wish to spread it among the weather gods.

      2018-09 Charigny_0184-2

      What Will It Bring

       

    • #303127
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#130

      dec0517b9119asp

    • #303657
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#131

      april1016a4531

    • #304955
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#132

      april1016a4533

    • #305967
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas #133

      april2817b2724

    • #306049
      Hans Stocker avatarHans Stocker
      Participant

      Love these wild waves on #133 that seem to got wrinkled a bit Michael.

      2018-09 Charigny_0167-2

      Thin Waves

    • #306227
      Hans Stocker avatarHans Stocker
      Participant

      2018-09 Charigny_0168-2

    • #306369
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas #134

      dec0517b8927

    • #306467
      Hans Stocker avatarHans Stocker
      Participant

      Neat soft and smooth blues in #134 Michael.

      2018-07 Wolken_0361-2
      French Asperitas Unnumbered

    • #307041
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas# 135

      april0916a4196

    • #307114
      Hans Stocker avatarHans Stocker
      Participant

      2018-06 Wolken_0071-2

      When People Don’t Look-up They Don’t Know What They Miss

    • #309198
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#136

      nov0417b7843b

    • #309330
      Hans Stocker avatarHans Stocker
      Participant

      Very smooth Michael.

      2018-06 Wolken_0072-3

      Is The Moustache Back En Vogue?

    • #309390
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#137

      nov0417b7859

    • #309786
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#138

      nov0417b7972

    • #310014
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#139

      nov0417b7833

    • #311120
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#140

      nov0417b7714

    • #311747
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas #141

      nov0417b746

    • #313993
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#142

      nov0417a7795

    • #314140
      Hans Stocker avatarHans Stocker
      Participant

      2017-08-02 Aspritas_0050 B&W ac uitsnede klein

      Last Year August

    • #316369
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#143

      jan1317b9870Asp

    • #318203
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas# 144

      jan1917b0171Asp

    • #318342
      Hans Stocker avatarHans Stocker
      Participant

      Great view on Asperitas #143 Michael. I noticed that this thread rapidly approaches a new volume (but not yet).

      Another B&W one from me spotted in July.

      2018-07 Wolken_0348-3

    • #320518
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas #145

      jan2017b0177Asp

    • #320585
      Hans Stocker avatarHans Stocker
      Participant

      No troubles anymore with the login going wonkers Michael?

    • #320690
      Michael Lerch avatarMichael
      Participant

      Hans..Problem went away for a few days but today its back to the ” refresh”  to stay logged in from screen to screen..

      Arizona Asperitas#146

      jan2217b0348Asp

    • #321197
      Hans Stocker avatarHans Stocker
      Participant

      It seems to be rather unpredictable Michael. Fortunately no problem to post replies so far.

      A nice play of light in this one.

      2018-04-01 Charigny_0149 s1ho klein

    • #322558
      Hans Stocker avatarHans Stocker
      Participant

      2018-06 Wolken_0200-2

      The Asperitas Vault

    • #323041
      Michael Lerch avatarMichael
      Participant

      Nice Simplicity Hans!

      Arizona Aperitas#147

      nov0417b7726

       

    • #323602
      Hans Stocker avatarHans Stocker
      Participant

      Thanks Michael.

      By the way: I still have to refresh the page content regularly after seemingly getting logged out, but not always.

      2018-03-03 Asperitas_0043 asr klein

      Like A Cavity

    • #324837
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#148

      nov1717b8582

    • #325278
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#149

      jan1917b0174Asp

    • #325569
      Hans Stocker avatarHans Stocker
      Participant

      Iphone Hans 074 B&W uitsnede ns100-220

      Windmills Nowadays

    • #327066
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#150nov0417b7923

    • #327179
      Hans Stocker avatarHans Stocker
      Participant

      The same event as taken with Nowadays Windmills, but now with a windmill from old times.

      2015-08-16 Asperitas_0048 lucht ns klein

    • #327550
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#151

      nov0417b7847

    • #328175
      Michael Lerch avatarMichael
      Participant

      Arizona Asperitas#152nov0417b7916b

    • #328322
      Hans Stocker avatarHans Stocker
      Participant

      Just a tip of the old-time Dutch windmill is visible.

      2018-06 Wolken_0220-3

    • #328341
      Patricia L Keelin avatarKeelin
      Participant

      Congratulations, Michael and Hans! Asperitas Volume I is a completely stunning collection. May the rock and roll ride continue. ~~~

      PS: Hans, might you have a spare windmill? I still yearn to see “the CAS Cloud” here in Napa, but so far, no go…

    • #329361
      DAVID DOWNS avatarShiprock45
      Participant

      Great thread.

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