ESS5
Prof. Jin-Yi Yu
–Graupel are ice crystals that undergo extensive riming
•Lose six sided shape and smooth
out
•Either falls to the ground or
provides a nucleus for hail
–Hail are concentric layers
of ice around graupel
•Up and downdraft interactions in
thunderstorms
•Great Plains = highest frequency of
hail events
Graupel and Hail