Last night I was updating my daily weather statistics for this month
and I came across what I thought must be an error. The stats showed
that the maximum and minimum temperature for the 14th were both 8.7°.
On checking, I found that this was, in fact, correct and was due to the
somewhat unusual behaviour of the temperature during the period
13th-15th. On 13th Oct the max was 19.5° at 1440z. From then, there was
a gradual temperature fall right through into the morning of the 14th
reaching 8.7° at 0900z on the 14th. This was the lowest temperature in
the 24 hours to 0900z on the 14th and therefore counts as the min for
the 14th. After 0900z on the 14th, the temperature continued to fall
gradually throughout daytime on the 14th then became steady on about 7°
during the night of 14th/15th. By 0900z on the 15th it had risen to
only 7.4°. The max temp for the 14th is the highest temp between 0900z
on the 14th and 0900z on the 15th which was 8.7° at 0900z on the 14th.
It is therefore correct that the min and max for the 14th were both
8.7°. I can't recall recording a similar occurrence previously.

--
Norman Lynagh
Tideswell, Derbyshire
303m a.s.l.