ice needle

From Glossary of Meteorology
(Redirected from Ice needles)
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 -4°C and also at much lower temperatures, below -25° to -50°C depending on ice supersaturation.

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