"Martin Rowley" wrote in
message

Very crudely, if you assume 2C per thousand feet, this
implies a surface maximum temperature of around zero in the coldest
spots - but with lots of caveats which I will let others drool over (the
sun is very powerful at this time of year).


True, one of my dodgy solar garden lights was still going strong well
after 22Z last night.

Jon.


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