Stuart Brooks wrote:
Ken Cook wrote:
How do these stand compared with record daily extremes for this
country? I think Rickmansworth had 28.3C back in the 1930s, but did
Tulloch Bridge record -5C to 25C (30degC) sometime in the 1970s? There
must be ranges approaching these records during this current spell. I
wonder what Redhill's figures are - I assume it is still open, just
not used by Met O any more.

Copley Lead Mill had 25.6degC yesterday (1.9C min 27.5C max) and
Copley Met O site had 24.2degC (from 3.7C ,grass -3.3C, to 27.9C)

Stuart Brooks
Think it was Tummel Bridge, -7C to 22C May 1978

Yes, I believe the Tummel Bridge value is the highest 'natural' diurnal
range (although I don't have a record of the exact values).

The highest official daily range at any UK site, i.e. 09-09h period,
known to me occurred at Altnaharra in the thaw immediately following
the equal-record low min on 30 Dec 1995. The min that morning was
-27.2°C; as the wind began to pick up it cleared the pools of cold air
nestling in the valleys and caused the temp at Altnaharra to rise a
remarkable 20.2 degC in 3 hours 1200-1500 GMT (-21.2°C to -1.0°C). By
next morning the screen temp had crept up to +2.1°C, making the daily
range 29.3 degC.

Ken - let me suggest you pen a note to COL and/or Weather on your
ranges at both your sites, which are probably within the top few
highest on record in UK. If you have a thermograph or AWS record too,
even better - I'm not aware of the Tummel Bridge value being so
documented.

Regards -- Stephen