"David Buttery" wrote in message
...
On Sun, 13 Dec 2009 22:55:03 +0000, Keith(Southend) wrote:

Some different look about the 18z run :-) Battleground moves to the
29th
Dec ?
Sub 528DAM in SE from Tues 15th to Mon 28th Dec 09

http://www.wzkarten.de/pics/Rtavn2881.png

Excuse my ignorance here (especially if it's already been
explained!) but
what does "DT" stand for in your subject line?

--
Bewdley, Worcs. ~90m asl.


..... 'data time', i.e. the nominal time of initialisation (or
analysis) of the particular forecast run: however, these days, it's
much more complicated as models ingest/assimilate data either side of
the nominal (chart) time - and of course they are 'fed' by
update/background runs from the previous 6 to 12 hours.

Martin.


--
Martin Rowley
West Moors, East Dorset (UK): 17m (56ft) amsl
Lat: 50.82N Long: 01.88W
NGR: SU 082 023