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This movement of large volumes of air, especially when regions of hot, wet air rise, can create large clouds, and is the central source of thunderstorms. Drafts can also be caused by low or high pressure regions. A low pressure region will attract air from the surrounding area, which will move towards the center and then rise, creating an updraft.
The resulting thunderstorms are “very dangerous” for air travel, Struckmann said. This is due to the “severe turbulence caused by updrafts, downdrafts, winds and hail.”
The formation of multicellular thunderstorms imply that the updraft in the mother thunderstorm is offset from its downdraft. New cells usually form in the upwind (usually western or southwestern) part of the storm where the downdrafts of the mature cells meet the environmental wind, lifting air parcels and triggering new convection.
This area is precipitation-free and the site of widespread updrafts. The updrafts under a cumulonimbus can be extremely laminar, extensive, and uniform, this is particularly true during the buildup of the thunderstorm. [8] They can last more than one hour and correspond to a steady state of the cumulonimbus. [9]
“Slicing through the eyeball of a hurricane, buffeted by howling winds, blinding rain and violent updrafts and downdrafts before entering the relative calm of the storm’s eye, NOAA’s two ...
For tornadoes to form, we need thunderstorms, which have very strong updrafts and downdrafts, said Bill Gallus, a professor in the department of Geological and atmospheric sciences at Iowa State ...
Rear-flank downdrafts have a well-established association with hook echoes. [3] [4] Firstly, the initial rear flank downdraft is air from aloft transported down to the surface by colliding and mixing with the storm. [2] Secondly, hook echoes form through advection of precipitation from the rear of the main echo around the region of strong ...
Most turbulence occurs in cloud with up- and downdrafts of wind, says BBC Weather's Simon King.
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