Cloud base in meteogram does not correspond to cloud base in map
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Why is there a difference for the cloud base depicted in the bottom line of the meteogram and the map? Both are labeled with "Cloud base", but don't match. In the city of Salzburg the meteogram shows 200m or less starting at 7:00 a.m. for friday and the map just shows "Data not available for this location". Why is the map not colored accordingly, because the data seems to be there? See screenshot.
The map often shows that there is no data available for cloud base. Because this corresponds with no coloring on the map (and good weather), I always assumed that "Data not available for this location" in the context of cloud base just means that the model says there is no cloud base. Similarly to visibility in aviation weather reports, where "visibility > 10km" is used for superb visibilities greater than 10km, where the precise value does not matter and is not given. On the other hand taken "Data not available for this location" literally the cloud base could be anything. How does this work and should be interpreted?
I would be greatful for some help in understanding this issues and probable limitations of the models etc. that cause this confusion.
best regards
Peter