Sorry to everybody, I checked my information,
and according to it the accident happened in the night
27/28th "shortly after changing the summer to winter time",
so shortly after 28th 02 ZULU
I corrected the METARS in my earlier posts.
Sorry again for the confusion.
You have trotted out the half-hourly METARS as your "evidence". The lowest RVR quoted on the METARS is 700 metres. The normal RVR minima for a CAT1 approach is 550 metres but I seem to remember that Katowice was nearer to 700 metres.
My mistake, but RVR from 02 ZULU are 027/0500, so 500m
Let's wait for the official report, maybe in a year or two...
EOT