https://bugs.kde.org/show_bug.cgi?id=522179

Tobias Burnus <[email protected]> changed:

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--- Comment #5 from Tobias Burnus <[email protected]> ---
> For DWD there is a weird situation: some stations provide current conditions 
> (temperature, wind, etc) while some others  don't.

On the DWD side, it is rather clear:

For the measured current weather conditions: Different stations provide
different data – like cloud coverage currently still needs a human, i.e. this
data is only available if someone is around to look at the sky and automatic
stations do not have it. Thus, depending on the station, some data is missing.

On the forecast side: DWD offers forecasts for certain locations using MOSMIX –
model-output statistics (MOS) and mixing models, i.e. mixing the DWD's ICON
model and the ECMWF's IFS model output – and mixing them and correcting them
based on statistics (i.e. past measurements). For instance, for a certain
weather condition, the temperature is always 2 degrees warmer than forecast,
i.e. it is increased by that amount.

For Berlin Alexanderplatz, the problem seems to be that live measure data is
not feed into the DWD such that it cannot show this temperature – however,
there must be a weather station because otherwise they wouldn't able to provide
MOSMIX data for it.  I also do not see anything at
https://wind-berlin.de/messwerte/berlinmap – thus, I assume that no hourly
weather station exists. (There might be one which records the data on paper and
someone takes out the roll every week or so.)

In the DWD app, there is a vertical bar at the current temperature, left of it
it shows only measured values (and is blank, e.g. for Alexanderplatz) and on
the right the calculated ones.

[Actually, I stand corrected: There is a climate / weather measurement system
at Alexanderplatz; but why it doesn't count as station, I don't know:
https://www.berlin.de/wetter/fotos/3959965-3959918.gallery.html?page=1 – it is
not listed at
https://www.dwd.de/DE/fachnutzer/landwirtschaft/appl/stationskarte/_node.html
which is consistent but does not help.)

Talking of which: If you go to that page – or to
https://www.dwd.de/DE/leistungen/klimadatendeutschland/stationsuebersicht.html
– you see the list of stations that should have provide hourly measured data.

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