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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.
Downbursts are created within thunderstorms by significantly rain-cooled air, which, upon reaching ground level, spreads out in all directions and produce strong winds. Unlike winds in a tornado , winds in a downburst are not rotational but are directed outwards from the point where they strike land or water.
Intensity and duration of rainfall are usually inversely related, i.e., high intensity storms are likely to be of short duration and low intensity storms can have a long duration. [32] [33] Rain drops associated with melting hail tend to be larger than other rain drops. [34] The METAR code for rain is RA, while the coding for rain showers is ...
Precipitation is measured using a rain gauge, and more recently remote sensing techniques such as a weather radar. When classified according to the rate of precipitation, rain can be divided into categories. Light rain describes rainfall which falls at a rate of between a trace and 2.5 millimetres (0.098 in) per hour. Moderate rain describes ...
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 ...
Finally, storm cells can form on the outflow of previous cells leading to multicellular thunderstorms or mesoscale convective systems. Slow motion of these more intense storm cells or groups of cells can produce large precipitation accumulations and flash flood, or other dangerous phenomena like hail and tornadoes. [3]
The same storm system that began producing severe weather and torrential rain in the southern United States Monday will pivot northeastward and is poised to set off severe thunderstorms from the ...
Severe storms are battering parts of the South with torrential rain and damaging winds, threatening tornadoes and creating “life-threatening” flooding.