Graupel

Graupel pellets in morning, having fallen the previous day

Graupel (/ˈɡrpəl/; 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 both formation and appearance. However, both hail and graupel are common in thunderstorms with cumulonimbus clouds, though graupel also falls in winter storms, and at higher elevations as well. [3] The METAR code for graupel is GS.

  1. ^ "Graupel - Definition". Merriam-Webster Dictionary. Merriam-Webster. Retrieved 15 Jan 2012.
  2. ^ "Glossary". International Cloud Atlas. World Meteorological Organization. 2017. Retrieved 2019-09-03.
  3. ^ "What in the world is graupel?". KUSA.com. April 30, 2019. Retrieved 2022-05-16.