Last year we mentioned the terms cinarra, freezing rain and cellisca. Let’s look at their definitions today.
The cinarra, as indicated in the International Cloud Atlas online, is a “precipitation of very small opaque white particles falling from a cloud”. They are flattened or elongated particles; its diameter is usually less than 1 millimeter.
It is a frozen precipitation that occurs at temperatures between 0 and -10 degrees Celsius approx. The cinarra can come from strata or from fog. It never falls as a shower.
The freezing rain or subcooled, on the other hand, is rain whose drops have a temperature below 0 degrees Celsius. These droplets freeze when they come into contact with the ground, aircraft or other objects.
The cellisca It is a precipitation of translucent ice particles (they are spherical or have conical tips) that occurs in showers that come from a cumulonimbus. It is an intermediate stage, according to the Atlas, between granulated snow and hail.