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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] Ice pellets generally fall in cold weather, while hail growth is greatly inhibited during low surface temperatures.
The updraft dissipates and the hailstones fall down, back into the updraft, and are lifted up again. Hail has a diameter of 5 millimetres (0.20 in) or more. [ 77 ] Within METAR code, GR is used to indicate larger hail, of a diameter of at least 6.4 millimetres (0.25 in) and GS for smaller. [ 78 ]
Graupel (/ ˈ ɡ r aʊ p əl /; German: [ˈɡʁaʊpl̩] ⓘ), also called soft hail or snow pellets, [1] is precipitation that forms when supercooled water droplets in air are collected and freeze on falling snowflakes, forming 2–5 mm (0.08–0.20 in) balls of crisp, opaque rime. [2] Graupel is distinct from hail and ice pellets in
Before hailstones become too heavy to fall to the ground, the updraft pushes them up repeatedly, freezing more ice around them. The stronger the storm, the more powerful the updraft, resulting in ...
Hail: How it forms and why it's destructive How big could hailstones get? “That’s the million-dollar question,” Kumjian said. So far, the world-record hailstone was found in Bangladesh in ...
Research suggests climate change will make hailstones larger. Already, hail has caused higher damage costs in the U.S. this year than hurricanes and floods put together.
Slush is a mixture of both liquid and solid precipitation. Frozen forms of precipitation include snow, ice crystals, ice pellets (sleet), hail, and graupel. Their respective intensities are classified either by rate of precipitation, or by visibility restriction.
The storms produced hail about the size of softballs. [8] [9] [10] 24 July 1996 Calgary, Alberta, and Winnipeg, Manitoba, Canada Orange-sized hailstones caused almost $300 million worth of damage in Calgary and Winnipeg, as well as serious flooding. Notably, one-third of cars damaged by the storm were irreparable. [11] 29 March 2000