Rare wave clouds taken at midday on December 16, 2011... looking south toward Red Mountain. Though spotter-dudes won’t have to cross the world to see this formation, those in search of the perfect Kelvin-Helmholtz will have to wait a while. Science Spotlight: Kelvin-Helmholtz Wave Clouds. Close to a wave trough (or a “valley”), air flows more slowly than in the environment, and therefore the ambient pressure is locally higher. AccuWeather. Can appear as breaking waves and as braided patterns in radar images and cloud photos. 800 x 600 jpeg 47kB. Cloud waves break in the same way: when their crests are pushed ahead of their troughs by the difference in air currents. Rare cloud phenomena called Kelvin-Helmholtz waves spotted above Virginia mountain resembling the Van Gogh painting Starry Night. The mesmerizing cloud formation, known as Kevin-Helmholtz clouds, looks like waves breaking in the ocean. Weather Underground provides local & long-range weather forecasts, weather reports, maps & tropical weather conditions for locations worldwide Skip Navigation. Kelvin-Helmholtz Waves Vertical waves in the air associated with wind shear across statically-stable regions. Top 22 Fascinating, Unusual Cloud Formations. Kelvin-Helmholtz Wave Clouds Over B’ham James Spann | December 16, 2011 @ 1:45 pm These images were sent in by a number of our readers/viewers at midday… the first shot below is from the Alabama Air National Guard facility at the Birmingham-Shuttlesworth International Airport… Rare wave clouds rolled through the sky over Smith Mountain Lake in Virginia on Tuesday: ‘It was so amazing’ Kelvin-Helmholtz wave clouds seen at Smith Mountain Lake in Virginia on Tuesday. Kelvin-Helmholtz wave clouds explained. The Kelvin–Helmholtz instability (after Lord Kelvin and Hermann von Helmholtz) typically occurs when there is velocity shear in a single continuous fluid, or additionally where there is a velocity difference across the interface between two fluids.A common example is seen with wind blowing over water, the instability constant is able to manifest itself through waves on a water surface. Pic of the week: Remarkable wave clouds paint the sky over Utah - The Washington Post. Science is all around you — but sometimes it goes unnoticed. Photos taken on Thursday, July 18, 2019. Here’s what caused those rare wave clouds over Denver on Sunday night Kelvin-Helmholtz clouds were spotted over parts of the Denver metro area on Sunday night, an extremely rare cloud … www.washingtonpost.com. When there is a difference of air densities, and the upper air is moving at a higher speed, the clouds will whip up into wave-like shapes. Kelvin-Helmholtz clouds look like breaking waves in the ocean. See more ideas about clouds, kelvin, waves. The development of Kelvin–Helmholtz waves in time is further illustrated by Figure 2.7. Kelvin-Helmholtz clouds in Portland, Oregon. How are they formed? Kelvin-Helmholtz Instability (KHI) (Helmoltz 1868, Kelvin 1871) is a hydrodynamic instability in which immiscible, incompressible, and inviscid fluids are in relative and irrotational motion.In KHI, the velocity and density profiles are uniform in each fluid layer, but they are discontinuous at the (plane) interface between the two fluids. ‘Kelvin-Helmholtz’ wave clouds rippled over the District on Monday evening - The Washington Post. These clouds resemble waves breaking on an ocean surface, but … Virus numbers by state How Biden got to 270 If … Kelvin-Helmholtz wave clouds explained. 8 months ago | 4 views. Follow. "A Kelvin-Helmholtz instability forms where there's a velocity difference across the interface between two fluids: for example, wind blowing over water.You’ll often see the characteristic wave structure in this type of cloud when two different layers of air in our atmosphere are moving at different speeds. This area will be pressed in the opposite direction. An example of Kelvin–Helmholtz waves on the top edge of a cloud is shown in Figure 2.8. A spectacular cloud formation delighted those staring into the blue skies in Central Otago yesterday afternoon. In the blog “Roll Call: Kelvin Helmholtz Clouds Make Weather Wave,” author Steve explains that Kelvin-Helmholtz clouds are likely to form when air masses move at contrasting speeds, especially if the layers of air differ greatly in temperature … Link: “Roll Call: Kelvin Helmholtz Clouds Make Weather Wave,” by Steve … Kelvin-helmholtz Wave Clouds is a photograph by Science Source which was uploaded on March 7th, 2013. These clouds resemble waves breaking on an ocean surface, but what exactly are they? Complex evaporation and condensation patterns create the capped tops and cloudless troughs of the waves. Surely many of us recall spending lazy summer afternoons staring up at big puffy clouds of varying shapes, letting one’s imagination run wild with interpretations of … thepopularlist.com. You can either type in the word you are looking for in the box below or browse by letter. Kelvin-Helmholtz wave clouds ☁️ These clouds, which resemble rolling ocean waves, were spotted by NIWA New Zealand atmospheric technician Dr Penny Smale over Central Otago on Sunday After wind blows up and over a barrier, like a mountain, the air continues flowing through the atmosphere in a wavelike pattern. The upper layers of air are moving at higher speeds and will often scoop the top of the cloud layer into these wave-like rolling structures. Kelvin-Helmholtz wave clouds, as they are known scientifically, occur when "there's a velocity difference across the interface between two fluids," according to EarthSky.org. 1484 x 991 jpeg 95kB. These clouds seen over Colorado’s Front Range are called Kelvin-Helmholtz wave clouds, named after the scientists that discovered the instability that causes them. Photos of Kelvin-Helmholtz clouds: 9 PHOTOS. The clouds are known scientifically as Kelvin-Helmholtz clouds, named after the two scientists who studied them in the 1800s. Download this stock image: Kelvin-Helmholtz Wave Clouds - HRJ214 from Alamy's library of millions of high resolution stock photos, illustrations and vectors. In order for us to see this shear layer, there must be enough water vapor in the air for a cloud to form. All products are produced on-demand and shipped worldwide within 2 - 3 business days. The upper layer of air usually moves faster than the lower layer because there is less friction. The Kelvin-Helmholtz instability is rarely observed in large air masses. Our goal is to create a safe and engaging place for users to connect over interests and passions. Popularly known as Kelvin-Helmholtz instability or KH wave clouds, the ‘fluctus’ cloud feature can be found amongst five cloud types: cirrus, altocumulus, cumulus, stratus, and stratocumulus. January 8, 2016. It is not uncommon to observe Kelvin–Helmholtz waves on the borders of clouds, where there is often a discontinuity in density and wind. A relatively short-lived wave formation, usually on the top surface of the cloud, in the form of curls or breaking waves (Kelvin-Helmholtz waves). Mar 4, 2014 - Explore Tim Brice's board "Kelvin-Helmholtz Clouds", followed by 111 people on Pinterest. Amy Hunter witnessed the Kelvin-Helmholtz waves… Definition: A cloud feature with an ocean wave appearance widely known as Kelvin-Helmholtz clouds Description & Characteristics. 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