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The rear flank downdraft can arise owing to negative buoyancy, which can be generated by cold anomalies produced at the rear of the supercell thunderstorm by evaporative cooling of precipitation or hail melting, or injection of dry and cooler air in the cloud, and by vertical perturbation pressure gradients that can arise from vertical gradients of vertical vorticity, stagnation of ...
Hail is a form of solid precipitation. [1] It is distinct from ice pellets (American English "sleet"), though the two are often confused. [ 2 ] It consists of balls or irregular lumps of ice, each of which is called a hailstone . [ 3 ]
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.
These new storms come in the heels of the weather events North Texas saw the past couple of days. Just last week, parts of the region was pummeled by baseball-size hail and even a tornado.
Later at night, these storms formed into an intense squall line that slid through much of Oklahoma, bringing large hail and destructive winds along with it.
This may include tornadoes, damaging straight-line winds, large hail and heavy rainfall. This comes right on the heels of multiple tornadoes that struck Texas and Louisiana on Thursday; a reminder ...
Cumulonimbus storm cells can produce torrential rain of a convective nature (often in the form of a rain shaft) and flash flooding, as well as straight-line winds. Most storm cells die after about 20 minutes, when the precipitation causes more downdraft than updraft, causing the energy to dissipate.
“As the dryline and cold front move into the area Thursday afternoon, storms will increase in coverage and intensity with a threat for large hail, damaging winds, and perhaps a few tornadoes ...