"Dick" schreef
"I have always assumed that the maximum temperatures that Colin lists
are for the 24 hours ending at 1800 GMT."
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Actually for the 12 hours ending 18.00 GMT - as reported in the 18.00 synop.
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"On this basis ... the High
Wycombe value is wrong. It should be 9.0C and not the quoted 7.4C. The
value of 7.4C looks to be either the 2100-2100 or 0900-2100 GMT
maximum."
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7.4°C reported as the 12-hour maximum at High Wycombe in the 18.00 synop.

Colin Youngs
Brussels