Diamond dust

From Glossary of Meteorology
Revision as of 15:03, 20 February 2012 by imported>Perlwikibot
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

diamond dust

Small ice crystals falling from an apparently cloudless sky, (often, but not always, at night).

Crystals originate from air having a higher moisture content above a thermal inversion aloft, where mixing leads to nucleation and growth of crystals at temperatures near -40°C.