In uk.sci.weather on Thu, 25 Aug 2005 at 20:30:27, David Mitchell wrote
:
I recall that when the graphics were first introduced one of the presenters
saying that the mins were for towns and cities. I assume that as the
majority live there that the mins indicated are more relevant to them than
us rural dwellers.

But how large does a town have to be to generate a significant heat
island?

I'm only about 1.5 miles from the centre of Cheltenham (in a suburban
area), and their forecast night temperatures are almost inevitably above
what I record.
--
Paul Hyett, Cheltenham