Posts Tagged asperatus
Just popping on as I found an interesting series of photos in between the subject I finished on last time and that I was going start on next time…my trip to Germany a while back. Now, I’ll say in the very early stages, this may or may not interest you so I won’t take offence if I don’t get any feedback! However, I find this kind of thing very interesting and, in a way, beautiful when it comes to the shapes in the clouds. If it is one thing I’d encourage you all to do, it is to look up once in a while, clouds aren’t all flat and grey.
One afternoon, just wandering around the house minding my own business I expect, the day got a little heavy cloud-wise and the first clue that something was swirling around appeared…
Now, without being able to point in directions and add annotations (I haven’t worked that out yet) you can see that a shelf of cloud is developing and is moving in from the upper part of the sky from right to left. In the distance, you can see the yellow colour displayed when there is rain in the air too and even a bit of virga. The thing is, when you looked to the left, the same was happening….
In this image, you can see in the upper part and the lower part there is some compact and elongated mammatus and some distinct curves in the cloud where more is developing. A sure sign that rain is coming! However, seeing one big lump is coming one way and one the other, this is where is got interesting as they met in the middle and created this kind of melee of tumbling clouds at low-level…
This continued on for quite a while and things got very dark and distinct lines of where the air is pulled in and pushed out became apparent in the form of asperatus-like curves and shapes…
Sadly, all things come to an end and the lovely show came to messy finish where everything was jumbled up all over. I was hoping for a rain shower, a clap of thunder or maybe I read things entirely wrong!
Mind you, not being one to give up easily when it comes to clouds (I often wonder what the residents of the houses backing on to the fields where I take my sunset pictures think of me) I saw that following this was a very distinctly shaped cloud which I have looked around for on the webby net. It seems that it ticks all the boxes for part of a flanking line for a storm cloud, so I think I was right! It was a storm close by but not over us..
In the words or Mr Wikipedia “a flanking line is an area of small clouds that mark an area of widespread updrafts in front of strong thunderstorms. These flanking lines generally occur in the vicinity of supercells or large multicell thunderstorms. The bases of the clouds making the flanking line are merged (like in the picture). The forefront area usually has no rain” (this accounts for the fact there was no rain the whole time.
“These feeder clouds will merge with the main cumulonimbus and will regenerate the storm.” That I can’t vouch for but “the feeder clouds are located at the west or southwest of the main cloud” I can vouch for as the large town that pretty much always has these big rain storms is located in that direction.
Just call me John Kettley.
Well, this concludes an overly scientific and speculative diagnosis of weather in my area of Wales. Next time, we embark upon a road trip to Germany! Thanks for dropping by and sticking with me in this post.
Back again! Within a month. Well, nearly.
Greetings anyway and thanks for dropping by. It’s a bit of a hotch-potch this post, I went through the pictures I have lodged chronologically and they were all over the place (or rather I was all over the county taking them) but I hope that you find them to your liking. I did think I was going to be able to go on to a water based theme, then this moved to clouds and then to beaches so…woops.
Anyway, how about the weather in Wales then? For those who aren’t fortunate enough to live in this area, it has been humid. Phew. I work in an office that has air conditioning but this is essentially for show, as it broke down in the first year or so of me being there and has never been fixed…we have Japanese tourist buses call in on occasion wondering quite how we retain such ancient cooling systems without spontaneously contracting Legionnaires. However, I’m more of an open window guy but even that hasn’t helped, as wind has been in short supply. However, this are changing, a little fresher and drier to come the weather people say. Mind you, weren’t they the ones who failed to predict the famous 1987 storm?! Anyway, cynicism aside, onwards to the pictures and associated nuggets of information…
Firstly, on the partial water theme and following on from my images of the boats last week, I ventured once again down to Port Lion and was fortunate to see evidence of one of the highest tidal ranges in the UK (upwards of 25 feet in the highest tide). In this instance, just a wet mark was left but, bear in mind that as you continue down the slip, there is usually a considerable stretch of beach to stand on which is underwater, that’s a whole heap of H2O….
Quite what possessed the owner of the house down at the bottom of the lane to think it was a good idea to build there confuses me, but build they did. Of late, the property has been revamped as well and it has a pretty awesome view but what does he say to his insurance company in the event of a disaster? I imagine the conversation would go something like this….
“So, how did the property flood?”…”Erm, it was a particularly sticky tap when I was running a bath upstairs….for a day…with mud in it”…”So, how do you account for the seaweed?”….”I like Japanese food and was hosting a sushi party?”. Hmm.
Moving to less ridiculous things and away from my twisted sense of humour, the next images are from one of my favourite beaches, Newgale. This place is packed during the Summer but, if you are a resident you get to see it at the best times, during Winter and Spring when it is quiet and sunny. As well as being a blue flag beach, which is one of the cleanest going, it is very beautiful in pretty much all weathers off season. Some of you may remember that this beach featured in my blog earlier when I posted some images of the ancient forest that had been uncovered by recent storms. In this incarnation though, I need the sand to give the effect I wanted….
Also, it appears that (unofficially) this beach marks the marks the boundary between English and Welsh-speaking Pembrokeshire, with the next beach north of Newgale being called Pen-y-Cwm. It also made an appearance in a music video (Delerium – Silence)…yes, you can see it here …Pembrokeshire on the tinterweb. Who’d have thought?
It wasn’t going to be long before I moved onto weather was it? Lenticular clouds. What? Yes, quite a rare occurrence around here, but there was a little rash of them not so long ago, only small, but they were there. Let me explain…..as air flows along the ground, it encounters obstructions like water in a flood would. These are every day objects, such as buildings and bridges, as well as natural features, like hills…in my case, the Preseli Hills. All of theses things disrupt the flow of air into eddies. The strength of the eddies depends on the size of the object and the speed of the wind. It results in turbulence, of a sort. Where stable moist air flows over a hill, a series of waves form. If the temperature at the crest of the wave drops to the dew point, moisture in the air may condense to form lenticular clouds. I admit, the ones I saw were not as dramatic as the link….
Here, you can see that the clouds have degraded into the waves I spoke of earlier…probably due to a change in the wind speed or direction. Not quite as pretty, but it demonstrates the principal.
In some circles, these clouds are referred to as UFOs (or “visual cover” for UFOs), particularly the round “flying saucer” type in the link pictures, because these clouds have a characteristic lens appearance and smooth saucer shape. Also, because lenticular clouds generally do not form over low-lying or flat terrain, many people have never seen one and are not aware clouds with that shape can exist. Bright colours are sometimes seen along the edge of lenticular clouds making people think they are other-worldly. However, they can form where a mountain does not exist, usually as the result of shear winds which are, again, not so common.
As an aside, the term flying saucer was created by an early documented sighting of “vehicles” over Mount Rainier by an amateur pilot, Kenneth Arnold. He described flying shapes moving “like a saucer if you skip it across water”. However, I’m sceptical…as per the description above, where are you most likely to see these clouds? Yes. Near mountains. It is quite a regular sight in the area, as per this picture by NASA.
Anyway, I took some further pictures later on of the further degradation and now that the wind had dropped and the moisture had increased, so had the cloud cover and there was a nice blanket of clouds with a slight asperitas feel….
I love the folds and lines in these types of clouds and you can pick up the shapes of the lenticular clouds in places if you look carefully. Nice. I admit, I should probably have smoothed this image of noise as it was dark, but the PC was protesting at this point, so you’ll have to forgive me!
Well, here endeth the prattle. If you have stayed on this long without just scrolling down the pictures, well done! No, thanks for that, all criticism and requests gladly taken but remember, don’t nick the pictures for your wallpaper! Ask me. I am happy to email full resolution copies upon request. All my details are in the blog, I don’t bite and won’t charge unless you ask me to print one, that’s a whole different kettle of fish…
Thanks again, see you all soon for more Pembrokeshire based picture based nuggets!
I return. Been a bit busy of late and with the weather getting better by the day, they has been quite a lot of riding of my new bike to be done. Also, when I had it serviced recently I opted to fit gel inner-tubes to protect against punctures, so I am now more confident riding the paths around here that seem to be strewn with thorns for some reason.
Also, my work colleagues have decided that being single is a source of lunch hour amusement for them and have put me on a site called Plenty of Fish…probably to take the mickey even further, but it’s quite time-consuming! I was also persuaded to attend a singles night locally the other day; little did I know that I would be the only person there. No, not the only man, the only person. I even got let down by people who promised to come with me! The barmaid was very apologetic, but it was super embarrassing…
Anyway, what a difference an hour makes in South West Wales weather? When I got up the wind was blowing and the rain was horizontal but now, I’m squinting against the sun as I type! Mind you, there has been a lot more of interest in “space weather” of late as you may have seen on the news lately? If not, there was a “supermoon” (which saw some amazingly low tides around the beaches near here), the partial eclipse and a sighting of the Northern Lights over Pembrokeshire. Should you want to see the local cover, please refer to the local paper…
Read about the eclipse over Pembrokeshire here
See some pretty awesome (although not as you see them in Norway, unfortunately) Aurora pictures here
Anyway, I shall start popping my own pictures on now! As I said, this is a bit of a random collection of mainly weather, as it appears that my travels were somewhat curtailed and these were more local wanderings. Firstly, a spider that caught my eye in the garden, wrapping up his next big meal it appears..
That is a pretty funky spider tattoo down his back, isn’t it?! I fully admit that I am no fan of spiders, but will concede that they are amazing little creatures. I am quite thankful that I live in a country that just has small ones though, not like the tropics. Eeek!
Moving on to the skies, as I quite often do, a nice dusk that I took a few pictures of. I have included these as I noticed on review of the images that there was a little aberration in the latter picture…not sure whether I noticed this at the time though…
In the latter image below, just above and to the left of the trees, you will notice a line of Kelvin Helmholtz instability. Now, I don’t know whether this is some optical illusion or something as the earlier pictures shows some “waves” in the high cloud. I can’t say for sure, but I’d like to think I caught the creation of the waves over time 🙂
Next, a common occurrence over Pembrokeshire, some mild asperatus. This is the only place I have ever seen the regular appearance of this cloud, that is similar in age to me. In that, I mean that it wasn’t really officially recognised as a type of cloud until 30 or so years ago; I’m sure it has been around for donkeys years. In the textbooks and such, this is a precursor to rain or is on the rear edge of a front that was just carrying rain (this I can testify to). So, if you see clouds like this, get a coat….
As the sky got a bit dimmer, there was a nice watery orange sunset so I snapped a quick image of that with a little of the asperatus in…
A few days later, things had turned a bit squally again. This again seems to be a theme here, there are times where we have weeks of squally heavy showers and because of the position of the house and the hills in the distance, we get a pretty good grandstand view. In the first instance there was this little cell struggling to make itself into an anvil shape over the estuary to our north, bless it…
Alas, wind blew this little cell apart and it died away to be replaced by three of four layers of “scud” which were whipping along in the wind at quite amazing speeds. I took a picture of these as they passed, as the colours and contrasts of the different levels were pretty cool, I thought…
For every cell that falls apart there are a few that succeed in dropping their rain. This one and the following picture are from a day where things were a little less “lumpy” so they are much more streamlined and pleasing to the eye, even though in looking at them you would have got wet! From this angle, you can see what I mean in me getting a good view as the weather moves from left to right (from the Irish Sea inland)…
And to finish, a rainbow! Everyone loves a rainbow. No particular structure to this one as this was a fleeting one that passed by in the clouds as the rain flew around in the air. Again, this is something which happens quite a lot in the Spring around here, very pretty…
Well, there we have it, I hope that the fact that the sun is (trying to come) out and the flowers are blooming has cheered you up and these picture may have raised a grin too. Don’t forget the clocks go forward this weekend too!
Next week, I see that I was out and about when there was fantastic display of cirrus “mares tails”, basically windblown cirrus clouds very high up in the atmosphere that also seem to show themselves in advance of heavy weather which I also manage to capture, so I shall be posting those images. I have others from my wanders that week too so if you are good, I might post some more moving water…
Well, that’s the lot for this post, cheers for dropping in and taking a peek, see you soon. I will also update you on any decent single life news in the next entry 🙂
Firstly, thanks to the comments I have received of late from a certain few regulars. Small but encouraging. Thanks. Also, much appreciate those recent new followers. I now have 39. Does anyone looking fancy making it a nice round 40?!
Additionally, I have now found the need to create a Photobox account as I was approached by a colleague for a print of a photograph I was displaying at work (thanks to my bosses for that). So, again…it’s now nice and easy to digitally send an image to them and create it in whichever format you want; I shan’t ask too much over the cost of the item (alas, I am not made of money and need to eat) but I will charge a percentage as I did in this last case. What not browse the archives and see what you like or ask me for a theme?
Have a think about it. Which is more than I can do at the moment as we have had a rash of Eurofighters flying over us of late using the target range near Castlemartin. They might be very high, but when they climb on full power under the cloud and rain we have here now it sounds like they’re idling in the garden!
Oooh, I have just realised that there is a tenuous link to the first images I am posting. Super! The link is that the phenomena are both from contrails. Firstly, a contrail shadow. I made the image a bit obvious as to how these are caused..in this instance it is simply that the sun is at such a height from the horizon that the contrail is above and is casting a shadow on the higher cloud…
Secondly, another form of contrail shadow in a way. In this case the sun was right “on the nose” of the contrail, neither above or below and cast a shadow which, essentially, goes as far as the eye can see until the curvature of the earth eradicates it. The short way to describe it is the exact opposite point to the sun. Alas, my lens is not wide enough to capture a decent image but you get the idea…
Can you feel your brains expanding with useless pub quiz knowledge? Eeeeexcellent. Next is something that you may have experienced through polarized sunglasses when glancing at clouds covering the sun or even seen in the same instance as this. Iridescence. Mr Wikipedia says that the explanation for this occasion is the presence of microscopic structures interfering with the light moving through this (frankly messy) spiders web….
Next, an older image that some of my Ceredigion readers may appreciate from a day when I was out in the hills from a blue sky filled with fair weather cloud to a weird, gloopy sunset I can’t really explain.
It’s nice to drive up into the hills now and again and you don’t have to travel too far off the road to experience a beautiful view of a classic shallow glacial gouge (I think) that has existed for many decades.
Upon my return, things had got a bit dull and dreary but once I had got in, I was noticing that there was a bit Asperatus around. Remember this? Although they can make the sky look dark and threatening, but they don’t always appear with or near rain, although I would say I have experienced that this is the case in about 3/4 of the time I have seen these clouds….
During the evening, things got a little darker and I had to lighten this image to make it viewable. For some reason I had fiddled with the exposure setting on my camera that meant it wasn’t easy to view on the PC.
However, after a few hours, things inexplicably cleared and presented me with a long-range view of a very strange sunset. Bear in mind it wasn’t quite this orange when I saw it (this is at full zoom and cropped) but what is that cloud?? Looks for all the world to be the son of Pileus, Asperatus and Lenticular. However, to the west I am fairly sure there’s nothing for Lenticular clouds to form over….unless this was just a freak?
Let me know what you think if you fancy throwing your hat in the ring.
Ah yes, I nearly forgot. It’s that time again with regards the Weathernet calendar and the competition is open to hobby photographers such as myself. I have managed to put together around 20 images I think that are half decent. I believe that my father is going to view them with his independent eye and say whether they are worth submitting so…wish me luck!
Thanks for stopping by, see you all soon. We are on to images of Belgium next, I promise. However, I will freely admit I will be splicing in some sunsets from before I went for colour as it rained a lot when I was there! Taa-raa.
Due to be a busy weekend here for a number of reasons, so I thought I’d take the opportunity to finish off this post. It’s also raining too…well, a mix of mist and rain, so there seemed little point in venturing out at the moment. I even cleaned the fish tank this morning too. I think they were grateful but there were many panicked splashes from fish trying to escape the nets and such!
Anyway, on to the second part of this asperatus I promised you. By the time I had taken these images, things were well and truly cleared ( no evil eye shapes in the clouds as one comment I received said) but there were a few showers flying, which you can see here….
As I said last week, these pictures were all taken on the one day and I had plenty of time to wander around to different spots I use (although judging by the distance covered, I suspect I used my bike). On the way up to one, I was quite surprised to be engaged by a horse in a field on the way; it seemed a touch shy and wouldn’t let me stroke its nose, maybe because it still hurt from bashing out the bits of wood in the gate! Horses like to see what’s going on!
Along from there, there was a field that time had forgotten it seemed. As you can see, the little trees were all gnarled and stunted and surrounded in places by abandoned farm machinery. Looked quite nice though and I will bear this place in mind for more detailed pictures come the Summer. I can only presume these bits of machinery are useless now….
However, from the gate, there was a nice view of the shower I spotted earlier over Haverfordwest that still appeared to be there. There were some really nice oranges in the clouds now but as you can see, things were starting to clear after the solid cloud of the past few hours. I believe the saying my Nan used was that “there is just enough blue to make a pair of sailors trousers”….
Wandering (or riding…I now think this is most likely as the next set of pictures were taken a fair distance away) my way back to one of my usual haunts, there had a been a teeny bit of drizzle and this had woken up a small snail who was running (!) for cover along a bramble leaf in the hedge in front of me…..
To finish the day, a nice sunset. I’m sure most people who see sunsets like this don’t describe them as nice but I though the orange and pink glow on the clouds was lovely and I got a nice glow from the crops in the field too, which I find incredibly difficult to do most times I try, so it was a victory for me!
Well that’s the lot from this day…the 4.00 pm until 9.30 pm all day weather shoot. Okay, so it’s nothing on storm chasing in the US or Australia, but it’s fairly unusual to see such vivid clouds in Wales. I wonder how many people even noticed that this was happening? Such a shame if it passed them by.
Thanks for dropping in and I’m very much appreciating those likes from people…please keep them coming. There are a load of sunsets coming up at a quick glance into the new folder so, if you like colourful evening light, keep tuned in!
See you soon, I hope.
I hope that everyone is well. It’s all hectic here as ever with issues with my car (don’t ask) and such going on, so apologies if this post is a little later than you expected but there is a need to be here, there and everywhere at the moment!
Our weather is warming up as we speak; although it was raining steadily (but lightly) this morning, there is an increase in the brightness by the minute so I’m hopeful for another colourful sunset this evening or tomorrow. With the warming weather comes the jobs to be doing outside as well…the lawnmower sits eagerly awaiting the first lawn cut of the season as we speak!
There have been some heavy showers flying around of late and there were a few anvil clouds silhouetted last night that I managed to snap. Unfortunately they were way, way, away over the West towards Ireland so it’s not the best picture. Maybe Summer will bring some dramatic skies again?
Speaking of dramatic skies brings me nicely onto this post. I realised as I was going through all the images I wanted to post that there were way too many to put up in one tranche….if I did I could almost imagine heads hitting keyboards! So, I have popped a few of the images together and chosen a natural break in the day that I took them to stop before posting the colourful conclusion….intriguing. Probably not, but I hope you like it it all the same.
As an aside, this is one of those posts that all the images were taken in one day, just so you can get an idea of quite how massive the changes were in the cloud deck. Anyway, the day started with a run out to Fishguard where, on the return journey, there is one of my usual haunts near Wolfscastle that I pop into for a quick watery portrait…..
As you can see, although there isn’t a lack of water in the river due to the drought (this is direct from the Preseli Hills which are never all that dry for long as they are mainly boggy) but having been there a few times the drop in level was quite noticeable. Here there has been talk of the sighting of a family of otters; I bumped into a fisherman a while back who told me that once that he was growled at by one! I guess that was a warning to stay away from the fish!
Nothing doing on this occasion and I’m probably far too noisy as I walk although if you are lucky, you might scare a kingfisher away and see a flash of blue as they shoot up onto the bank to hide. As I travelled home, the sky became more overcast (those who visit often know that I spend quite a lot of time looking up) and the air grew heavier, so it appeared that the weather forecast for rain was right. However, the cloud was looking pretty evil by later afternoon…..
I took a quick snap of a nicely formed tailing cloud from a storm and thought that was that. I was wrong. This turned out to be an attack of Asperatus, one of the best looking sets of Asperatus I have seen. To find out more about this gorgeous type of cloud, I recommend using this link if you like pictures (http://cloudappreciationsociety.org/cloud-tags/asperatus/#p=1&t=cloud118&i=0) or this one (http://en.wikipedia.org/wiki/Undulatus_asperatus) if you wish to read about the decisions that need to be made to classify the cloud as a new type and how they come to be formed.
I have seen these quite a few time since living in Pembrokeshire and they always seem to either precede or follow a long period of dry weather which is going to be “broken” by rain. Or at least that’s my experience. However, in my eyes the most important bit is the fact they look pretty awesome.
As I said, I took looooooads of pictures. I think I counted about 50 or 60 when i was going through the archive folder (all different shapes and shades so I had to choose a few good examples and hope these are OK).
By the time I had taken these last images, I thought that the clouds had passed us by and things would settle down to be a bit boring, flat and grey. Mischief was nearby, so he caught my attention instead…..
It’s hardly a flattering picture and I’m sure he wouldn’t thank me for posting images of his chunky little tummy for you all to see but he can’t argue!
Wandering back indoors, I considered that the photogenic nature of these clouds had dried up but it appeared that I was wrong, I was out down the road taking pictures until dark! Part 2 will come along shortly….those who like a bit more colour will enjoy it I’m sure.
In the meantime, thanks for bearing with me and hope you’ll pop back in a week or so for the finishing images. Tatty bye for now!