Natural phenomena8/18/2023 ![]() Brightly colored circumhorizontal arcs occur mostly during the summer and between particular latitudes. The halo is so large that the arc appears parallel to the horizon, hence the name. Technically they are known as a circumhorizontal arc, an ice halo formed by hexagonal, plate-shaped ice crystals in high-level cirrus clouds. Fire rainbows are neither fire, nor rainbows, but are so-called because of their brilliant pastel colors and flame-like appearance. Fire Rainbowįire rainbows can only be seen in locations north of 55°N or south of 55°S. What’s more, lightning activity is highest during the beginning stages of an eruption, making it all the more challenging to capture on film. The same thing is thought to happen in regular thunderstorms. Smaller eruptions tend to be accompanied by more diminutive storms, which can be difficult to spot through thick clouds of ash. As positively charged ejecta makes it’s way skyward, regions of opposite but separated electrical charges take shape.Ī lightning bolt is nature’s way of balancing the charge distribution. ![]() Volcanic lightning, researchers hypothesize, is the result of charge-separation. Other instances have been reported above Alaska’s Mount Augustine volcano, and Iceland’s Eyjafjallajökull volcano. This can happen during volcanic eruptions. A dirty thunderstorm (also known as volcanic lightning) is a weather phenomenon that is related to the production of lightning in a volcanic plume. A famous image of the phenomenon was photographed by Carlos Gutierrez and occurred in Chile above the Chaiten Volcano. This is because-much like tornadoes-supercells have the tendency to spin around a lot, but also-and more importantly-because supercells can actually create tornadoes. Supercells are one of the few types of clouds that typically spawn tornadoes within the mesocyclone, although only 30% or fewer do so.Ī supercell is basically a stronger, more tornado-enabled version of a regular storm cell. They usually produce copious amounts of hail, torrential rainfall, strong winds, and substantial downbursts. Supercells can be any size – large or small, low or high topped. Supercells are often isolated from other thunderstorms and can dominate the local weather up to 32 kilometers (20 mi) away. For this reason, these storms are sometimes referred to as rotating thunderstorms. The most threatening and deadliest of all thunderstorms, a supercell is characterized by the presence of a mesocyclone: a deep, persistently rotating updraft. Supercells can occur anywhere in the world under the right pre-existing weather conditions, but they are most common in the Great Plains of the United States in an area known as Tornado Alley and in the Tornado Corridor of Argentina, Uruguay and southern Brazil. In this manner, the amazing ‘petals’ that you see in these pictures are formed. This new water reaches the cracks and it too freezes, pushing the previous slither of ice away from the stem. ![]() It travels up the plants’ external stem and reaches the split or splits.Īs it does so, it oozes slowly out and it freezes. Water is continuously being drawn up the plant’s stem while the ground remains unfrozen. ![]() These will finally give way under the pressure of the sap and split open. As it does so, the outer layer of the stem comes under increasing pressure and microscopically thin cracks, known as linear fissures, begin to form. As the temperature gets to freezing or below, the sap in the stem of the plants will expand. This extrusion creates wonderful patterns that curl and fold into gorgeous frozen petioles giving this phenomenon both its name and its appearance. As beautiful as it is rare, a frost flower is created in autumn or early winter mornings when ice in extremely thin layers is pushed out from the stems of plants or occasionally wood. It can be found anywhere on a cold morning provided the conditions are right. This flower is one of the most beautiful of its kind. Imagine having the chance to get a glimpse of this amazing cloud formation. They don’t usually form and only happen under rare conditions. Lenticular clouds have been mistaken for UFOs (or “visual cover” for UFOs) because these clouds have a characteristic lens appearance and smooth saucer-like shape. See my Affiliate Disclosure for more details. If you click on one and buy something, I may earn from qualifying purchases. Note: This post may contain affiliate links which will take you to online retailers that sell products and services.
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