On Thu, 8 Apr 2004 19:46:01 +0100, "Martin Rowley"
wrote:


"Przemek" wrote in message
...
Hi!

I wonder since when have we used SYNOP FM-12 data format? And what was
before it? Does anybody know that? Maybe there're any websites where I
can
read about it? I would be greatful for any links.


... can't give 'chapter and verse' on exact dates etc., but just to
start the ball rolling, I can remember taking part in the International
trials of plotting the code (it was all manual with double-coloured pens
then) in the late 1960's (I *think* 1969, but not absolutely sure), and
the code as we now know it came into use early 1970's. It replaced what
we used to know as the 'Washington' code, which was agreed sometime in
the late 1940's (?1949) when WMO was up and running. Others may be able
to come in with better information etc.

1969 was about right - I plotted both and also took part in the
trials. Best part of the new code was the temps in tenths of a
degree.

Martin


Martin.