Re: Heathrow Metars

"Phil Layton" <t3pdl@xxxxxxxxxxx> wrote in message
news:3sjnr4Fodc7dU1@xxxxxxxxxxxxxxxxx
>
> One possible theory is that the 'raw' metar now has the trend added by
> Exeter after ATC has produced the initial observation. This, I believe, is
> then producing a 'COR' Metar, which may not be acceptable to some
> collectives. I know that there was an issue with the data being absorbed
by
> a big airline for the first few days which prevented this trend being
added
> in the first place. Just a theory.

Yes, following the recent code changes METARs that are retransmitted with a
Trend added remotely (Heathrow, Norwich and Manchester) are sent as a COR.
This is seemingly causing the missing web data as Phil suggests. However,
some do 'escape'
http://weather.uwyo.edu/cgi-bin/wyowx.fcgi?TYPE=metar&DATE=current&HOUR=current&UNITS=M&STATION=EGLL
possible reasons for this are the Trend being added late (i.e. the original
METAR makes it onto the broadcast) or the Trend wasn't added at all (as is
the case with the 3 AUTO METARs overnight) - although I'm sure fairly sure
the Trend was added to the 0320Z, 0420Z and 0550Z last night, hmmm.

The COR METARs are being ingested correctly into the MetO aviation site and
Avbrief.

IIRC Heathrow Met Office officially closes on Tuesday morning and the SYNOPs
then become automatic.


>
> The lack of high cloud ( above 5,000ft ) has already been mentioned in
this
> newsgroup, and is part of CAA/ICAO changes that came in on the 5th Oct. I
am
> afraid that all stations will eventually only report cloud below 5000ft
> unless its CB.

Yep, however there's still a large number of stations who are still
reporting cloud at 5000ft or above..

Jon.


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