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The center of the storm continued to drift to the east-southeast into the early hours of August 29, but never strayed more than 70 mi (110 km) away from the Texan coast. Convection blossomed again later that day, with the center jumping northwards into the convection as Harvey began moving to the northeast.
All thunderstorms, regardless of type, go through three stages: the developing stage, the mature stage, and the dissipation stage. [11] [better source needed] The average thunderstorm has a 24 km (15 mi) diameter. Depending on the conditions present in the atmosphere, these three stages take an average of 30 minutes to go through. [12]
A polar low is a small-scale, symmetric, short-lived atmospheric low-pressure system (depression) that is found over the ocean areas poleward of the main polar front in both the Northern and Southern Hemispheres. The systems usually have a horizontal length scale of less than 1,000 kilometres (620 mi) and exist for no more than a couple of days.
One source of the brown ocean effect has been identified as the large amount of latent heat that can be released from extremely wet soils. [1] [3] [4] A 2013 NASA study found that, from 1979-2008, 45 of 227 tropical storms either gained or maintained strength after making landfall. [5]
The polar cell is a simple system with strong convection drivers. Though cool and dry relative to equatorial air, the air masses at the 60th parallel are still sufficiently warm and moist to undergo convection and drive a thermal loop. At the 60th parallel, the air rises to the tropopause (about 8 km at this latitude) and moves poleward.
Convection is also seen in the rising plume of hot air from fire, plate tectonics, oceanic currents (thermohaline circulation) and sea-wind formation (where upward convection is also modified by Coriolis forces). In engineering applications, convection is commonly visualized in the formation of microstructures during the cooling of molten ...
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A good example of convective instability can be found in our own atmosphere. If dry mid-level air is drawn over very warm, moist air in the lower troposphere, a hydrolapse (an area of rapidly decreasing dew point temperatures with height) results in the region where the moist boundary layer and mid-level air meet. As daytime heating increases ...