Air min this morning 8.0°C - grass min 4.7°C
Today's max was 32.2°C

Daily range an exceptional 24.2 degC

Stevenson screen, open site, Vaisala HMP45C T/RH sensor, confirmed by
co-located MiG thermometers.

Adjacent Davis AWS showed 8.0° to 31.7° and precision thermistor in
Campbell Scientific radiation screen 8.1° to 32.5°C.

Second-highest daily range on my (35 year) personal record - the only
higher was 16 April 2003, which attained 25.0 degC (2.4°C to 27.4°C).

Exceptionally low RH - min 19% at 1615. This is the equal-lowest on my
personal records, with 18 June 2000. Several days this month have
already seen below 30%.

Stephen Burt
Stratfield Mortimer, Berkshire

"Stephen Burt" wrote in message
oups.com...
Air min this morning 8.0°C - grass min 4.7°C
Today's max was 32.2°C

Daily range an exceptional 24.2 degC

Stevenson screen, open site, Vaisala HMP45C T/RH sensor, confirmed by
co-located MiG thermometers.

Adjacent Davis AWS showed 8.0° to 31.7° and precision thermistor in
Campbell Scientific radiation screen 8.1° to 32.5°C.

Second-highest daily range on my (35 year) personal record - the only
higher was 16 April 2003, which attained 25.0 degC (2.4°C to 27.4°C).

Exceptionally low RH - min 19% at 1615. This is the equal-lowest on my
personal records, with 18 June 2000. Several days this month have
already seen below 30%.

Stephen Burt
Stratfield Mortimer, Berkshire

================================================== ===
Good Evening Stephen,

My 0900hrs Air Min this morning was 10.7'C
My 0900hrs Grass Min was 10.7'C (Concrete Min was 11.8'C)
At 1600z Air Temp was 33'C and RH was 24%
My Daily Range being 22.3'C

The joys of an AWS !

Best Wishes

Richard
COL - Horsham,West Sussex

Stephen Burt wrote:
Air min this morning 8.0°C - grass min 4.7°C
Today's max was 32.2°C

Daily range an exceptional 24.2 degC

Hi, Stephen,

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)

These large ranges remind me of the 1976 summer.

Ken
http://copley.mysite.orange.co.uk

Ken Cook wrote:
Stephen Burt wrote:
Air min this morning 8.0°C - grass min 4.7°C
Today's max was 32.2°C

Daily range an exceptional 24.2 degC

Hi, Stephen,

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)

These large ranges remind me of the 1976 summer.

Ken
http://copley.mysite.orange.co.uk

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

I've never recorded more than a 19C daily range at my plateau site

--
Stuart Brooks
Carluke
South Lanarkshire 223m amsl

webcams at
www.brooks22.plus.com/index.htm
INC new high res webcam

Stuart Brooks wrote:
Ken Cook wrote:
Stephen Burt wrote:
Air min this morning 8.0°C - grass min 4.7°C
Today's max was 32.2°C

Daily range an exceptional 24.2 degC

Hi, Stephen,

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?


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

I've never recorded more than a 19C daily range at my plateau site


Thanks, Stuart,

It's all coming back to me now! Spent many a holiday in the area,
wonderful!

Best wishes,
Ken

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

"Stephen Burt" wrote in message
oups.com...
Air min this morning 8.0°C - grass min 4.7°C
Today's max was 32.2°C

Daily range an exceptional 24.2 degC

snip
Daily range of 21.4 degC up here at Whipsnade, from 9.1 to 30.5,
which for what is essentially a hilltop site is quite remarkable. I've been
surprised at how cool the nights here have been during both hot
spells since I moved in last month. At the moment the only
instrumentation is in the garden which is located in a shallow dell
some 15m or so below the crest of the escarpment. I suspect that
may be sufficient to produce some big differences under radiation
conditions between this site and the intended observatory site on
the crest.

Philip

For Wokingham, the daily range on 17th was 21.0C, (10.5 to 31.5). This is
the second highest for July here in 31 years of record, the highest being
21.7C on 15th July 1990. The absolute highest daily range was 22.7C on 30th
June 1995.
My Rh did not fall below 20%, min 23% at 1411z.

--
Bernard Burton
Wokingham, Berkshire, UK.

Satellite images at:
www.btinternet.com/~wokingham.weather/wwp.html
"Stephen Burt" wrote in message
oups.com...
Air min this morning 8.0°C - grass min 4.7°C
Today's max was 32.2°C

Daily range an exceptional 24.2 degC

Stevenson screen, open site, Vaisala HMP45C T/RH sensor, confirmed by
co-located MiG thermometers.

Adjacent Davis AWS showed 8.0° to 31.7° and precision thermistor in
Campbell Scientific radiation screen 8.1° to 32.5°C.

Second-highest daily range on my (35 year) personal record - the only
higher was 16 April 2003, which attained 25.0 degC (2.4°C to 27.4°C).

Exceptionally low RH - min 19% at 1615. This is the equal-lowest on my
personal records, with 18 June 2000. Several days this month have
already seen below 30%.

Stephen Burt
Stratfield Mortimer, Berkshire

In message , Bernard Burton
writes

For Wokingham, the daily range on 17th was 21.0C, (10.5 to 31.5). This is
the second highest for July here in 31 years of record, the highest being
21.7C on 15th July 1990. The absolute highest daily range was 22.7C on 30th
June 1995.
My Rh did not fall below 20%, min 23% at 1411z.

I'm only getting 15-16C ranges here.
--
Paul Hyett, Cheltenham (change 'invalid83261' to 'blueyonder' to email me)

Stephen Burt wrote:
Air min this morning 8.0°C - grass min 4.7°C
Today's max was 32.2°C

Daily range an exceptional 24.2 degC

Stevenson screen, open site, Vaisala HMP45C T/RH sensor, confirmed by
co-located MiG thermometers.

Adjacent Davis AWS showed 8.0° to 31.7° and precision thermistor in
Campbell Scientific radiation screen 8.1° to 32.5°C.

Second-highest daily range on my (35 year) personal record - the only
higher was 16 April 2003, which attained 25.0 degC (2.4°C to 27.4°C).

Exceptionally low RH - min 19% at 1615. This is the equal-lowest on my
personal records, with 18 June 2000. Several days this month have
already seen below 30%.

Stephen Burt
Stratfield Mortimer, Berkshire

My figures for my Davis AWS on the 18th of July are 32.8°C maximum and an
11.7°C minimum with a minimum RH of 21%.
The maximum here today is 33.7°C so far but the minimum last nightwas 13.5°C
so the range is unlikely to be greater today.

Since my station is in a sheltered back garden the temperatures are probably
slightly higher than would be seen from a more open location required for an
official site.

Alan