Well the temperature rose to the dizzy hieghts of 2.2°C for me at
Southend-on-Sea. Looking back at my records the last max lower than this
value was 0.7°C on 11th March 2013. I wonder if this will be my lowest
of the winter, wouldn't surprise me?
--
Keith (Southend)
"Weather Home & Abroad"
http://www.southendweather.net
Twitter:@LawnscienceEssx

On Sunday, 4 January 2015 18:26:35 UTC, Keith (Southend)G wrote:
Well the temperature rose to the dizzy hieghts of 2.2°C for me at
Southend-on-Sea. Looking back at my records the last max lower than this
value was 0.7°C on 11th March 2013. I wonder if this will be my lowest
of the winter, wouldn't surprise me?
--

It is set to rise later in the night, thus masking this event in the 24hr record

--

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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.

Scott W wrote:
On Sunday, 4 January 2015 18:26:35 UTC, Keith (Southend)G wrote:
Well the temperature rose to the dizzy hieghts of 2.2°C for me at
Southend-on-Sea. Looking back at my records the last max lower than this
value was 0.7°C on 11th March 2013. I wonder if this will be my lowest
of the winter, wouldn't surprise me?
--

It is set to rise later in the night, thus masking this event in the 24hr record

-------------------------------------------------
Still only 2C here so will be coldest since March 26th 2013 here.
Dave, S.Essex

On Sunday, 4 January 2015 23:09:00 UTC, Dave Cornwell wrote:
Scott W wrote:
On Sunday, 4 January 2015 18:26:35 UTC, Keith (Southend)G wrote:
Well the temperature rose to the dizzy hieghts of 2.2°C for me at
Southend-on-Sea. Looking back at my records the last max lower than this
value was 0.7°C on 11th March 2013. I wonder if this will be my lowest
of the winter, wouldn't surprise me?
--

It is set to rise later in the night, thus masking this event in the 24hr record

-------------------------------------------------
Still only 2C here so will be coldest since March 26th 2013 here.
Dave, S.Essex

Does the Met Office and WMO record their days in the same way? ie the max for the day is recorded 06Z to 18Z.

Looking at forecast my own 24hr max will probably be at 0859 tomorrow - so will not appear that significant.

Temp here has been almost stationary since 4pm: 2.5C

--

------------------------------
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.

Scott W wrote:

On Sunday, 4 January 2015 23:09:00 UTC, Dave Cornwell wrote:
Scott W wrote:
On Sunday, 4 January 2015 18:26:35 UTC, Keith (Southend)G wrote:
Well the temperature rose to the dizzy hieghts of 2.2°C for me at
Southend-on-Sea. Looking back at my records the last max lower than this
value was 0.7°C on 11th March 2013. I wonder if this will be my lowest
of the winter, wouldn't surprise me?
--

It is set to rise later in the night, thus masking this event in the 24hr
record

-------------------------------------------------
Still only 2C here so will be coldest since March 26th 2013 here.
Dave, S.Essex

Does the Met Office and WMO record their days in the same way? ie the max for
the day is recorded 06Z to 18Z.

Looking at forecast my own 24hr max will probably be at 0859 tomorrow - so
will not appear that significant.

Temp here has been almost stationary since 4pm: 2.5C

In the UK the standard meteorological day is 0900 GMT to 0900 GMT. The minimum
temperature within that period is assigned to the day at the end of the period
whereas the maximum temperature is assigned to the day at the start of the
period. This does throw up some anomalies, particularly with minimum
temperature in winter. Similarly rain is measured for the 24 hours ending 0900
GMT with the total being assigned to the day at the start of the 24-hour
measuring period. Therefore the 24-hour rain measured at 0900 GMT on, say, the
10th of the month is entered in the records as the rainfall for the 9th.

Other countries have different conventions, depending on the difference between
GMT and local time.

--
Norman Lynagh
Tideswell, Derbyshire
303m a.s.l.
http://peakdistrictweather.org

Scott W wrote:
On Sunday, 4 January 2015 23:09:00 UTC, Dave Cornwell wrote:
Scott W wrote:
On Sunday, 4 January 2015 18:26:35 UTC, Keith (Southend)G wrote:
Well the temperature rose to the dizzy hieghts of 2.2°C for me at
Southend-on-Sea. Looking back at my records the last max lower than this
value was 0.7°C on 11th March 2013. I wonder if this will be my lowest
of the winter, wouldn't surprise me?
--
It is set to rise later in the night, thus masking this event in the 24hr record

-------------------------------------------------
Still only 2C here so will be coldest since March 26th 2013 here.
Dave, S.Essex

Does the Met Office and WMO record their days in the same way? ie the max for the day is recorded 06Z to 18Z.

Looking at forecast my own 24hr max will probably be at 0859 tomorrow - so will not appear that significant.

Temp here has been almost stationary since 4pm: 2.5C

-------------------------------------------------------------
I imagine the convention of 9-9 was originally used so that readings
could be taken at a more sensible time of day. It would be difficult to
change thereafter for consistency. I get the impression that since the
instigation of AWS's to the market the majority of Amateurs use midnight
to midnight with all the data being for that day. Not that that doesn't
cause problems with things like maxima at 11.00 pm and so on.
Yours is an excellent example of why weather statistics shouldn't be
taken in isolation over short time periods because they can
retrospectively give a very false impression of what the weather was
like on a particular day, as in this case.
Dave.

Dave Cornwell wrote:

Scott W wrote:
On Sunday, 4 January 2015 23:09:00 UTC, Dave Cornwell wrote:
Scott W wrote:
On Sunday, 4 January 2015 18:26:35 UTC, Keith (Southend)G wrote:
Well the temperature rose to the dizzy hieghts of 2.2°C for me at
Southend-on-Sea. Looking back at my records the last max lower than
this value was 0.7°C on 11th March 2013. I wonder if this will be my
lowest of the winter, wouldn't surprise me?
--
It is set to rise later in the night, thus masking this event in the
24hr record

-------------------------------------------------
Still only 2C here so will be coldest since March 26th 2013 here.
Dave, S.Essex

Does the Met Office and WMO record their days in the same way? ie the max
for the day is recorded 06Z to 18Z.

Looking at forecast my own 24hr max will probably be at 0859 tomorrow - so
will not appear that significant.

Temp here has been almost stationary since 4pm: 2.5C

-------------------------------------------------------------
I imagine the convention of 9-9 was originally used so that readings could be
taken at a more sensible time of day. It would be difficult to change
thereafter for consistency. I get the impression that since the instigation
of AWS's to the market the majority of Amateurs use midnight to midnight with
all the data being for that day. Not that that doesn't cause problems with
things like maxima at 11.00 pm and so on. Yours is an excellent example of
why weather statistics shouldn't be taken in isolation over short time
periods because they can retrospectively give a very false impression of what
the weather was like on a particular day, as in this case. Dave.

Although a bit out of date now the following gives the full chapter and verse:

http://www.metoffice.gov.uk/media/pd..._Chapter_1.pdf

--
Norman Lynagh
Tideswell, Derbyshire
303m a.s.l.
http://peakdistrictweather.org

On Monday, 5 January 2015 10:05:47 UTC, Dave Cornwell wrote:
Scott W wrote:
On Sunday, 4 January 2015 23:09:00 UTC, Dave Cornwell wrote:
Scott W wrote:
On Sunday, 4 January 2015 18:26:35 UTC, Keith (Southend)G wrote:
Well the temperature rose to the dizzy hieghts of 2.2°C for me at
Southend-on-Sea. Looking back at my records the last max lower than this
value was 0.7°C on 11th March 2013. I wonder if this will be my lowest
of the winter, wouldn't surprise me?
--
It is set to rise later in the night, thus masking this event in the 24hr record

-------------------------------------------------
Still only 2C here so will be coldest since March 26th 2013 here.
Dave, S.Essex

Does the Met Office and WMO record their days in the same way? ie the max for the day is recorded 06Z to 18Z.

Looking at forecast my own 24hr max will probably be at 0859 tomorrow - so will not appear that significant.

Temp here has been almost stationary since 4pm: 2.5C

-------------------------------------------------------------
I imagine the convention of 9-9 was originally used so that readings
could be taken at a more sensible time of day. It would be difficult to
change thereafter for consistency. I get the impression that since the
instigation of AWS's to the market the majority of Amateurs use midnight
to midnight with all the data being for that day. Not that that doesn't
cause problems with things like maxima at 11.00 pm and so on.
Yours is an excellent example of why weather statistics shouldn't be
taken in isolation over short time periods because they can
retrospectively give a very false impression of what the weather was
like on a particular day, as in this case.
Dave.

TO be honest Dave I use the 09-09 out of habit, back to when I first started taking readings as a lad in the 1980s. The historic records I use were also 09-09 and it is the simple reason Cumulus gives you the 09 option that I decided to continue. I remember reading an article years ago about a retired observer continuing his profession in his garden because the 09 observation "gets me out of bed in the mornings".

--

------------------------------
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.

On Monday, 5 January 2015 14:05:32 UTC, Norman wrote:
Dave Cornwell wrote:

Scott W wrote:
On Sunday, 4 January 2015 23:09:00 UTC, Dave Cornwell wrote:
Scott W wrote:
On Sunday, 4 January 2015 18:26:35 UTC, Keith (Southend)G wrote:
Well the temperature rose to the dizzy hieghts of 2.2°C for me at
Southend-on-Sea. Looking back at my records the last max lower than
this value was 0.7°C on 11th March 2013. I wonder if this will be my
lowest of the winter, wouldn't surprise me?
--
It is set to rise later in the night, thus masking this event in the
24hr record

-------------------------------------------------
Still only 2C here so will be coldest since March 26th 2013 here.
Dave, S.Essex

Does the Met Office and WMO record their days in the same way? ie the max
for the day is recorded 06Z to 18Z.

Looking at forecast my own 24hr max will probably be at 0859 tomorrow - so
will not appear that significant.

Temp here has been almost stationary since 4pm: 2.5C

-------------------------------------------------------------
I imagine the convention of 9-9 was originally used so that readings could be
taken at a more sensible time of day. It would be difficult to change
thereafter for consistency. I get the impression that since the instigation
of AWS's to the market the majority of Amateurs use midnight to midnight with
all the data being for that day. Not that that doesn't cause problems with
things like maxima at 11.00 pm and so on. Yours is an excellent example of
why weather statistics shouldn't be taken in isolation over short time
periods because they can retrospectively give a very false impression of what
the weather was like on a particular day, as in this case. Dave.

Although a bit out of date now the following gives the full chapter and verse:

http://www.metoffice.gov.uk/media/pd..._Chapter_1.pdf

--
Norman Lynagh
Tideswell, Derbyshire
303m a.s.l.
http://peakdistrictweather.org

Thanks Norman. It's easy to see that it is a full time job using the old methods and instruments.

--

------------------------------
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.