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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 ]
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.
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 ...
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.
“The main things we’re looking at are our large hail and damaging winds with the storms, but it is springtime, so all of these tornadic storms can and do occur.” ... Right now it looks like ...
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.
Such storms are rarely severe and are a result of local atmospheric instability; hence the term "air mass thunderstorm". When such storms have a brief period of severe weather associated with them, it is known as a pulse severe storm. Pulse severe storms are poorly organized and occur randomly in time and space, making them difficult to forecast.
A line of storms in the central U.S. could unleash tornadoes and a barrage of dangerous conditions on Wednesday, meteorologists warn. Tornadoes, hail, torrential rain threaten central US states as ...