View allAll Photos Tagged convection
We were on a vacation trip through California, Nevada, Utah and Arizona. We saw the fires on August 10, 2012, when we were at the shores of Mono Lake in California (near Lee Vining). All the days before we were continuously accompanied by thunderstorms that broke out regularly during the afternoon. The photo was taken before the daily thunderstorm, however, the large convective system already hinted to the next storm to come. It was not clear if this convective cloud system was generated by the uplift of heated air initiated by the fire, or if the convection was just one of the regular thunderstorm events we observed every day, and the related convection sucked up and transported the air and smoke from the fire upwards. Or if a combination of both occurred. In any case, the cumulus cloud was quite isolated, with clear sky surrounded, but you can already see a small developing anvil (the area where ice is formed in the cloud) above the cauliflower-like cumulus cloud. This is a hint towards a developing thunderstorm.
The wild fire was started through lightning ignition on August 8 by a thunderstorm coming from the Sierra Nevada, and it burned for several days (until August 14 at least) on open grassland and far away from human infrastructures.
Late afternoon thunderstorms are quite normal for Singapore lying so close to the Equator. Precious rain water is diverted down a series of canals to one of 17 water catchment reservoirs. More than 80% of the population of this small Country live in high-rise flats/apartments.
pixelswaggersl.blogspot.com/2023/08/i-come-in-peace.html
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Ormai vicino al confine con il Laos, il fiume Mekong appare gonfio e limaccioso per le piogge torrenziali delle montagne del nord. Sopra di esso, sospese, si innalzano delle nubi convettive grandiose, come pinnacoli verso il cielo
#convective #clouds #mekong #river #water #mud #wave #fiume #laos #thailandia #boat #barca #sky #cielo
Afternoon thunderstorms create the best conditions in Bodie! This one was a real gully-washer, leaving deep puddles all over town. Fortunately afternoon convection shuts down when the sun sets, and any remaining clouds tend to drift away while they also disperse, so we get perfectly clear skies at night, in spite of a little smoke (that is actually helping the visibility of the sun rays).
We couldn't notice the smoke in daylight after the big rain, but the light of the setting sun filtering through the remaining clouds and peaks of the Bodie Hills cast beams of golden light over the town.
I stuck around to shoot in the area on the night after the workshop, but without rain, there was a lot more smoke in the air. I pulled the plug on the night shoot, and headed home to get some much-needed sleep. With reports of new fires across the West (and record drought in progress and record year-to-date acres already burned), it seems that the 2022 fire season is well underway and set to be a bad one.
A few fires are normal, but the air quality was so bad and unhealthy last year, we didn't plan any workshops from mid-July through September. We'll spend more time in Death Valley December through April instead.
A beautiful cloudy sky above the Netherlands.
This type of clouds are called Cumulus congestus. Cumulus congestus clouds are characteristic in unstable areas of the atmosphere which are undergoing convection. They are often characterized by sharp outlines and great vertical development. Because they are produced by strong updrafts, they are typically taller than they are wide. Yesterday the weather was really unstable: sun and rain with heavy winds were alternating. A perfect moment for Cumulus congestus!
Below the clouds the windmill Bonrepas in the community of Vlist, really close to my hometown Schoonhoven, is visible.
Di questi tempi, alzare gli occhi al cielo e vedere un'enorme nuvola a forma di fungo, mette sempre una certa apprensione... sembrava quasi un fungo atomico per una esplosione atmosferica!
Per fortuna in questo caso si trattava di un semplice fenomeno di convezione dovuto alla forte umidità dell'aria... ma un brivido viene comunque
#fungo #mushroom #cloud #nuvola #convective #convettiva #virgas #rain #pioggia #cielo #sky #atomic #nuke #bomb #padova
One of the unexpected benefits of Saharan dust is that it makes sunsets and sunrises even more vibrant, as the sun’s rays are amplified through the atmosphere’s thick layer. It can even cause the sunlight to burst into an impressive array of purples, pinks, oranges, and yellows. The dust is lifted up by convection and travels thousands of kilometres in just a week, reaching as far as the western Caribbean.
This thunderstorm fizzled as it approached resulting on only a sprinkle. With temperature only in the mid-50's, I was surprised that there was any convection possible. Still, all in all a photogenic moment. My Nikon (at right) captured a very nice short time lapse: www.flickr.com/photos/79387036@N07/51275078808/.
From the flight deck of a DHC-100.
Crepuscular rays
Crepuscular rays /krɪˈpʌskjʊlər/ (more commonly known as sunbeams, sun rays, or god rays), in atmospheric optics, are rays of sunlight that appear to radiate from the point in the sky where the sun is located. These rays, which stream through gaps in clouds (particularly stratocumulus) or between other objects, are columns of sunlit air separated by darker cloud-shadowed regions. Despite seeming to converge at a point, the rays are in fact near-parallel shafts of sunlight. Their apparent convergence is a perspective effect, similar, for example, to the way that parallel railway lines seem to converge at a point in the distance. The sun rays do converge to the sun, but the sun is much further away than the rays might make it look like.[2]
The name comes from their frequent occurrences during twilight hours (those around dawn and dusk), when the contrasts between light and dark are the most obvious. Crepuscular comes from the Latin word "crepusculum", meaning twilight.[3]
Source: en.wikipedia.org/wiki/Crepuscular_rays
Thunderstorms
What is a thunderstorm?
A thunderstorm is a rain shower during which you hear thunder. Since thunder comes from lightning, all thunderstorms have lightning.
Why do I sometimes hear meteorologists use the word “convection” when talking about thunderstorms?
Usually created by surface heating, convection is upward atmospheric motion that transports whatever is in the air along with it—especially any moisture available in the air. A thunderstorm is the result of convection.
What is a severe thunderstorm?
A thunderstorm is classified as “severe” when it contains one or more of the following: hail one inch or greater, winds gusting in excess of 50 knots (57.5 mph), or a tornado.
How many thunderstorms are there?
Worldwide, there are an estimated 16 million thunderstorms each year, and at any given moment, there are roughly 2,000 thunderstorms in progress. There are about 100,000 thunderstorms each year in the U.S. alone. About 10% of these reach severe levels.
The last of the day's convective clouds trying their best to overpower the huge anticyclone stubbornly parked over middle Europe. Though they barely amounted to something, points definitely go for trying - and posing for a swell photograph!
Jackson Township, Ohio
Mammatus (mamma or mammatocumulus), meaning "mammary cloud", is a cellular pattern of pouches hanging underneath the base of a cloud, typically cumulonimbus rainclouds, although they may be attached to other classes of parent clouds. The name mammatus is derived from the Latin mamma (meaning "udder" or "breast"). According to the WMO International Cloud Atlas, mamma is a cloud supplementary feature rather than a genus, species or variety of cloud. They are formed by cold air sinking down to form the pockets contrary to the puffs of clouds rising through the convection of warm air.
It's not the most photogenic location but it is one of my favourite spots to watch the skies. Some more convection, taken yesterday lunchtime.
Shelf cloud at Burrow Beach and Baldoyle Bay earlier this afternoon associated with the passage of a heavy hail shower. It was nice to see some convection at last after all the teasing of cells dying as they came close to Dublin in past 2 weeks!
The Sutton Golf Club is a bit off on the right if you zoom in due to a mis-alignment in the panorama but doesn’t make much a difference to the overall image.
Shenandoah National Park, VA
Thick fog lying in Virginia's Piedmont at sunrise. Dense fog is formed by a total cloud inversion, which occurs when cold air is trapped below and topped by a layer of warm air. An inversion acts like a lid, keeping normal convective overturning of the atmosphere from penetrating through the inversion.
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... take eight overlapping portrait format frames and stitch them together. A scene looking northward over part of Newcastle city, Australia during a brief sunny interlude this afternoon. The atmosphere is extremely humid, and the Tasman Sea is warmer than usual, as La Niña lingers. Yet more intense rain is forecast for the NSW Coast, with the prospect of another East Coast Low forming off Sydney in the next day or so, dumping even more rain on already saturated coastal catchments.
A day of strong southerly winds, humidity, high temperatures and a fast approaching cold front in the Twin Cities led to fast development of thunderstorms across the area.
These storms formed right over the Twin Cities metro area before pushing off to the east into Wisconsin.
I was near MSP Airport awaiting the arrival of Air France but after an hour of holding they diverted to Chicago. To make up for that loss I decided to get a photo of the storms right above my head.
Some of these linear, non-supercell options get really pretty. Last night west of Saint Francis, Kansas, as a trailing clump of convection poured it on. I dialed the saturation down a bit to get closer to the visual colors seen. Blue, turquoise, purple, yellow depending on where the flashes were occurring. My daughter and I were talking about how the constant, varied flashes of color were reminiscent of Close Encounters of the Third Kind. Haunting. Makes me want to watch that again soon.
It's raining sideways, but the CG lightning bolts are coming straight on down from this tornado warned cell between Osage City and Burlingame. Wall clouds and a possible funnel cloud out of this storm, which was part of a Quasi-Linear Convective System, better known as a QLCS, but this portion of the line moved straight east and produced numerous tornadoes once it arrived into the Kansas City area.
Quite an early start to the chase season this year.
3-6-17
Osage City, KS
Mardi 16 aout, 18h13
Après 4 jours de fiesta et de fortes chaleurs lors du teknival du Larzac, ( yihaaaaa! ) un beau système convectif se met en place et prend toute son ampleur en fin d'après-midi lorsque toutes les petites cellules fusionnèrent pour ne former plus qu'une énorme masse nuageuse menaçante, m'offrant un spectacle saisissant avec une très belle structure en constante évolution et quelques éclairs proches peu rassurants.
Cela faisait un bon moment que je n'avais pas vécu un orage aussi riche et aussi majestueux, un vrai kif!
Le pano ( pas parfait ) donne une forte impression de recule mais la bête était déjà quasiment au dessus de moi et continuait son inévitable progression.
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Tuesday, August 16, 18:13
After 4 days of fiesta and high temperatures at the teknival of Larzac, (yeaaah!) a good convective system is being set up and comes into its own in the late afternoon when all the small cells merged to form more than a huge cloud threatening mass, offering me a show entering with a beautiful structure evolving and some chilling near flashes.
It's been a while that I had not lived a storm as rich and as majestic, a true kif!
The pano (not perfect) gives a strong impression of backing down but the beast was already almost above me and continued his inevitable progression.
Recette:
Cut the Brussels sprouts in half lengthwise leaving the base intact. Pull off any wilted leaves. Preheat oven on Convection/Roast to 450º with your sheet pan in the oven to heat. In a bowl, season with sea salt and freshly ground black pepper. Drizzle extra virgin olive oil, balsamic vinegar and a small amount of honey. Toss well to coat.
Once the oven has heated, remove the sheet pan and place alll the sprouts on the pan cut side facing down. Reduce oven temp to 400º and place the pan in oven. Roast for 15-20 minutes, turning the sprouts over about 1/2 way through cooking. Finished when there is nice even caramelization of the sprouts. Serve immediately while still hot.
Lunch time clouds still allow peeks through to paradise below. Dreamliner landing approach to Honolulu, Hawai'i.
Actually, this is a singular example of a cloud street: earthsky.org/earth/what-are-cloud-streets/. Dissipating stratocumulus at sunset takes on a severe storm persona. However, winter convection is the hint that these types of clouds pose no threat.
Looking from northwest to east-southeast.
Picture of the Day
[ a trona terniō ]
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# music: bauhaus, the silent hedges
"Following the silent hedges
Needing some other kind of madness
Burning the private paradise of dreams
Going to hell again ..."
[ not necessarily a rational choice, it just popped into my chaotic head as i was working with something. ]
Another panoramic image of the thunderstorms hanging out over, Morris, IL. This one is made up of somewhere between 7-11 images (I forget exactly how many), all shot vertically. With the sun setting fast, it didn't take hardly any tweaking to really to bring out the golden light. Yes, that bright spot in the upper right is the moon, and on July 4, 2020 it would become a "Thunder Moon" full moon, and with a penumbral lunar eclipse to boot! And why not? It's 2020 afterall...
Hot, humid, & stagnant daytime air was ripe to cause convective activity in the early evening, resulting in these three cells to pop alongside each other. They continued to grow until eventually and essentially blowing themselves apart. Looking east out over Plainfield, Channahon, and Morris, Illinois.
There has been no shortage of pop up thunderstorms throughout the area over the last week. These pop up thunderstorm cells that have formed have been quite impressive! Here is one thunderstorm cell that formed within a matter of minutes just south of our place in Savage, MN.
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Orage d'air froid au dessus de la côte de Nacre, avec de nombreux coups de foudre positives.
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Cold air mass storm over the Côte de Nacre, with positive lightning strike.
2016 - Calvados / Normandie / France.
This from the web:
Cumulus clouds are part of the larger category of free-convective cumuliform clouds, which include cumulonimbus clouds. The latter genus-type is sometimes categorized separately as cumulonimbiform due to its more complex structure that often includes a cirriform or anvil top.
Abbreviation: Cu
Altitude: 200–2,000 m, (1,000–6,600 ft)
Appearance: Low-altitude, fluffy heaps of clouds with cotton-like appearance.
Genus: Cumulus (heap)
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# solar imagery from THE TRONA LO-FI SCIENCE OBSERVATORY
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# TRONA.INFRARED.MIX [623nm]
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# MUSIC" [temporarily]: DR. BENWAY'S HOUSE, SONIC YOUTH
Yellowstone National Park
Wyoming
USA
Hot springs are the most common hydrothermal features in Yellowstone. Beginning as precipitation, the water of a hot spring seeps through the bedrock underlying Yellowstone and becomes superheated at depth. An open plumbing system allows the hot water to rise back to the surface unimpeded. Convection currents constantly circulate the water, preventing it from getting hot enough to trigger an eruption.
At times, fierce, boiling waters within a hot spring can explode, shooting water into the air, acting much like a geyser.
Many of the bright colors found in Yellowstone's hydrothermal basins come from "thermophiles" — microorganisms that thrive in hot temperatures. So many individual microorganisms are grouped together—trillions! — that they appear as masses of color.
Different types of thermophiles live at different temperatures within a hot spring and cannot tolerate much cooler or warmer conditions. Yellowstone's hot water systems often show distinct gradations of living, vibrant colors where the temperature limit of one group of microbes is reached, only to be replaced by a different set of thermophiles.
A colorful westbound stack train wastes no time getting through the west end of Rice and away from the convection to the southeast. I was hoping to better scope out this spot, but the timing was tight and I had no chance.