Urban Heat Island this morning
 

Quite impressive. Below freezing widely in SE and Central Southern England (eg -2 in Wokingham) but + 6.7 deg as I arrived at work on Fleet Street just after 0800.

Urban Heat Island this morning
 

wrote in message
...
Quite impressive. Below freezing widely in SE and Central Southern England
(eg -2 in Wokingham) but + 6.7 deg as I arrived at work on Fleet Street
just after 0800.

When I was forecasting at London Weather Centre in the late 70s/early 80s
the default minimum for central London in winter was 7C. i.e. if you were
unsure, just go for 7C and you would not be far out on a radiation night. As
you observe it can be -4C in the sticks and 7C in central London. I suspect
the heat island has spread a bit too?

Will
--
http://www.lyneside.demon.co.uk/Hayt...antage_Pro.htm
Will Hand (Haytor, Devon, 1017 feet asl)
---------------------------------------------

Urban Heat Island this morning
 

"Eskimo Will" wrote in message
...

wrote in message
...
Quite impressive. Below freezing widely in SE and Central Southern
England (eg -2 in Wokingham) but + 6.7 deg as I arrived at work on Fleet
Street just after 0800.

When I was forecasting at London Weather Centre in the late 70s/early 80s
the default minimum for central London in winter was 7C. i.e. if you were
unsure, just go for 7C and you would not be far out on a radiation night.
As you observe it can be -4C in the sticks and 7C in central London. I
suspect the heat island has spread a bit too?


That was weekdays of course, you had to go for a default 4C at weekends!
Only exception was with a strong wind advecting colder air in, one day the
temperature flat-lined day/night at -1C in a cold easterly.

Will
--
http://www.lyneside.demon.co.uk/Hayt...antage_Pro.htm
Will Hand (Haytor, Devon, 1017 feet asl)
---------------------------------------------

Urban Heat Island this morning
 

On Thursday, November 6, 2014 9:16:16 AM UTC, wrote:
Quite impressive. Below freezing widely in SE and Central Southern England (eg -2 in Wokingham) but + 6.7 deg as I arrived at work on Fleet Street just after 0800.

It depends where you are in central London. St James's Park, for example, was only 1.9C at 0800, after a minimum of 1.4C.

Dick Lovett

Urban Heat Island this morning
 

"Dick" wrote in message
...
On Thursday, November 6, 2014 9:16:16 AM UTC,
wrote:
Quite impressive. Below freezing widely in SE and Central Southern
England (eg -2 in Wokingham) but + 6.7 deg as I arrived at work on Fleet
Street just after 0800.

It depends where you are in central London. St James's Park, for example,
was only 1.9C at 0800, after a minimum of 1.4C.


Yes when I worked in London, it was amazing how chilly the parks got,
sometimes ground frosty but with nearby streets 5 degrees higher. My
experience was around High Holborn.

Will
--
http://www.lyneside.demon.co.uk/Hayt...antage_Pro.htm
Will Hand (Haytor, Devon, 1017 feet asl)
---------------------------------------------

Urban Heat Island this morning
 

On Thursday, November 6, 2014 10:13:21 AM UTC, wrote:


Yes when I worked in London, it was amazing how chilly the parks got,
sometimes ground frosty but with nearby streets 5 degrees higher. My
experience was around High Holborn.

=======

And Lincoln's Inn Fields would be a tad chillier. But St James's Park, indeed, more so. Which reminds me of the occasional very pleasant hour out of the office on a Sunday morning cycling or walking down there to make the observation.

Stephen.

Urban Heat Island this morning
 

On Thu, 6 Nov 2014 01:16:15 -0800 (PST),
wrote:

Quite impressive. Below freezing widely in SE and Central Southern England (eg -2 in Wokingham) but + 6.7 deg as I arrived at work on Fleet Street just after 0800.

There's the lesser suburban heat island too where I live. There is
nothing truly urban near me (halfway between Portsmouth and
Southampton, and well outside Fareham town) but plenty of suburban
sprawl.

So, my back garden minumim was +0.2C but the much more exposed
Southampton airport (also Hurn) reported -2C for a while, similar to
my grass minimum of -2.2.

--
Dave
Fareham (W)
http://www.wunderground.com/personal...ID=IENGLAND600

Urban Heat Island this morning
 

On Thursday, 6 November 2014 09:16:16 UTC, wrote:
Quite impressive. Below freezing widely in SE and Central Southern England (eg -2 in Wokingham) but + 6.7 deg as I arrived at work on Fleet Street just after 0800.

I'm 7.2 miles as the crow flies east from Fleet Street and it was -1.3C before the temp began rising at 0658z. I ride in most days and it always amazes me the difference in just a few miles.

--

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Urban Heat Island this morning
 

On Thursday, November 6, 2014 5:52:19 PM UTC, Scott W wrote:
On Thursday, 6 November 2014 09:16:16 UTC, wrote:
Quite impressive. Below freezing widely in SE and Central Southern England (eg -2 in Wokingham) but + 6.7 deg as I arrived at work on Fleet Street just after 0800.

I'm 7.2 miles as the crow flies east from Fleet Street and it was -1.3C before the temp began rising at 0658z. I ride in most days and it always amazes me the difference in just a few miles.

--

------------------------------
This email was sent by a company owned by Pearson plc, registered office at
80 Strand, London WC2R 0RL. Registered in England and Wales with company
number 53723.

-----------------------------------------------------------------------------
There's an awful lot of underground passages and sewers under the streets of London.

These unquestionably contribute to the UHI.
May be accounting for 3 Degrees according to Will's weekday/weekend figures.

A good PhD (Piled high and Deep) topic for some geographer if you ask me.

Len

-----------------------------------------------------------------------------

Urban Heat Island this morning
 

"Len Wood" wrote in message
...
On Thursday, November 6, 2014 5:52:19 PM UTC, Scott W wrote:
On Thursday, 6 November 2014 09:16:16 UTC,
wrote:
Quite impressive. Below freezing widely in SE and Central Southern
England (eg -2 in Wokingham) but + 6.7 deg as I arrived at work on
Fleet Street just after 0800.

I'm 7.2 miles as the crow flies east from Fleet Street and it was -1.3C
before the temp began rising at 0658z. I ride in most days and it always
amazes me the difference in just a few miles.

--

------------------------------
This email was sent by a company owned by Pearson plc, registered office
at
80 Strand, London WC2R 0RL. Registered in England and Wales with company
number 53723.

-----------------------------------------------------------------------------
There's an awful lot of underground passages and sewers under the streets
of London.

These unquestionably contribute to the UHI.
May be accounting for 3 Degrees according to Will's weekday/weekend
figures.

A good PhD (Piled high and Deep) topic for some geographer if you ask me.

Len

-----------------------------------------------------------------------------

Are the sewers colder at the weekends Len ?
Altitude also has a factor with calm nights,I live just a couple of miles
from Scott,but around 250ft,so on calm clear nights my mins are several
degrees above the lower lying places around here like Wanstead.
Indeed when I lived in the middle of industrial Stratford during the '63
winter which was very built up and heated by many coal fires (no central
heating in those days !),I clocked a minimum of minus 13C on the morning of
January 23rd..
Yes my clogs were too cold to wear without wrapping my feet with newspaper
first.......

RonB