Norman Lynagh wrote:

I'm a bit surprised at the minimum temperatures forecast on BBC1 at
6.30 p.m. this evening. Single figure mins were predicted for
Scotland but elsewhere double figure mins were predicted. I haven't
looked into it in much detail but for this part of the country the
McKenzie method predicts a min of around 7-8C, assuming light winds
and only small amounts of cloud. This would be quite a bit colder
than the TV forecast suggested.
Norman.
(delete "thisbit" twice to e-mail)
snip...

I agree -- a rough calc using Tmax of 17 and Td of 8 with very light wind
and little cloud produces a min of around 8C. (this is for the Finningley
area)..
The discontinuity of 11.5 is not too far from present temp of around 12C
with patches of decaying CU.
John
--
York,
North Yorkshire.
(c.20 metre AMSL)