Hail

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  • Massive Hail In Oklahoma City

    cnn.com 37 minutes ago

    I had a front row seat to 3" hail hitting my front porch. The hail lasted for over 10 minutes.

  • Video: Severe Hail Storm Hits Oklahoma City

    cbs.com 2 hours, 34 minutes ago

    A damaging hail storm coupled with heavy wind gusts caused property damage, injuries and knocked out power for nearly thousands of customers.

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via Wikipedia
Hail is a form of solid precipitation. It consists of balls or irregular lumps of ice, each of which is referred to as a hail stone. Unlike graupel, which is made of rime, and ice pellets, which are smaller and translucent, hail stones – on Earth – consist mostly of water ice and measure between 5 and 200 millimetres in diameter. The METAR reporting code for hail 5 mm or greater is GR, while smaller hailstones and graupel are coded GS. Hail is possible within most thunderstorms as it is produced by cumulonimbi, and within 2 nautical miles of the parent storm. Hail formation requires environments of strong, upward motion of air with the parent thunderstorm and lowered heights of the freezing level. In the mid-latitudes, hail forms near the interiors of continents, while in the tropics, it tends to be confined to high elevations.
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