On 17/03/2012 11:10, John Hall wrote:
Thanks. Presumably the High Wycombe maximum is since 9am only, as I
imagine that it would have been warmer than 7.4C at 6pm the previous
evening.

.... just to answer John's query, from the SYNOP reports, the highest
hourly in the period 15/1800 to 16/1800Z was 9.0°C at 15/18Z. I don't
know how WeatherOnline sort their maxima out so can't comment on that
aspect.

As a general remark (not for Dick, because I know he knows!), 'High
Wycombe' is not really a very 'representative' name for the observing
location. It is station number 03660, which unless it's been
significantly moved since my time, is sitting on top of the bunker at
the facility which has as it's nearest village Walter's Ash. This is
some 7 km/4 miles NNW of the centre of High Wycombe, and the observing
point is listed as 204 m amsl, c.f., a figure of around 100-120 m for
the middle of High Wycombe (and 5 m for St. James' Park).

Martin.



--
Martin Rowley
West Moors/East Dorset UK