"Editorial: Of cats, dogs and convection", The Independent, 2/3/2013:
One of the more widespread urban myths whose veracity is disputed is that the Inuit peoples have scores, even hundreds, of different words for snow. Whatever the precise truth, it is certainly the case that those who live in the Far North have more snow-words than those in the temperate latitudes, with the implication, of course, of many different kinds of snow.
Where the Inuits lead, we may be about to follow. The chairman of the Environment Agency is warning of a new kind of rain. Convective rain, says Lord Smith of Finsbury, does not sweep across the country as a curtain, but dumps a deluge in just one place. This altogether alarming, climate-change-related phenomenon may not only add to the problem of flooding; it may also add to the language. “What’s it like outside?” could soon be followed by: “It’s coming down convective”. A useful, if worrying, addition to cats and dogs.
"Convective rain" events may be becoming more common in Britain, but most of us already have ways of referring to them — we call them thunderstorms. And among meteorologists, the term "convective rain" has been around for a while, even in the British Isles…
V. A. Bell & R. J. Moore, "The sensitivity of catchment runoff models to rainfall data at different spatial scales", Hydrology and Earth System Sciences,, 2000:
The sensitivity of the distributed rainfall-runoff model to the spatial resolution of rainfall data was investigated for periods of predominantly stratiform and convective rain from 20 January to 1 March 1995 and 20-29 May 1994 respectively. [...]
The period from 20 to 29 May 1994 experienced episodes of convective activity. An anticyclone was located over Iceland until 27 May with low pressure over southern Britain bringing predominantly easterly winds, cloudy conditions and heavy rain at times with some thunderstorms.
F.A. Huff and G.E. Stout, "Distribution of Radioactive Rainout in Convective Rainfall", Journal of Applied Meteorology, 1964.
Luna B. Leopold, "Diurnal Weather Patterns on Oahu and Lanai, Hawaii", Pacific Science, 1948:
The importance of convective rain in the Territory has not been sufficiently emphasized.
R. S. A. Beauchamp, "Hydrology of Lake Tanganyika", Internationale Revue der gesamten Hydrobiologie und Hydrographie, 1939:
Lake Tanganyika is situated in the tropical belt. For the greater part of the year the midday sun is near the vertical. Most of the rain is convective rain.