Seems like I have found the answer myself. Windy had, again, changed the API Key and further, even after I started to use the new API key, the station data were screwed up at Windy, so I had to add a new Station 1 with same parameters, change my script to specify station 1 in the URL and NOW it seems to work again.
Best posts made by Rolandoz
RE: Reporting from PWS works but Windy does not show it online
RE: Weather Radar not showing full country
Yes, I agree now. But they have been missing for a period. There was a very sharp edge at the right side of my red circle. It was a vertical line of 200 km or so. I will keep an eye on it next time we have a "rain carpet" covering that whole area.