Subscriber Login

  • This account has no valid subscription for this site.

Forgotten your password?

More on this Topic

A Dictionary of Weather

Storm Dunlop


The state in which a substance (particularly water) exists as a liquid at a temperature below its normal freezing point. This often occurs in clouds that extend above the 0 °C isotherm, being particularly common in altocumulus. In the absence of freezing nuclei, supercooled droplets may exist at temperatures as low as −40 °C.

Was This Useful?