Term: Ice needle Class:  
 vernacular   (0%)
Created 6 June 2017
Last modified 6 June 2017
Contributed by GCW Glossary


Definition: A long, thin ice crystal, axis coincident with the c axis of ice and with the cross section perpendicular to its long dimension being, at least in part, hexagonal. Ice needles grow in a narrow range of temperature near -4C and also at much lower temperatures, below -25 to -50C depending on ice supersaturation.  AMSglossary 

Ice crystals with a long, slender, prism-like shape, forming at a temperature between -4 and -6C.  WMOMeteoterm