MU774 over E Finland
 

... doing some pretty interesting weather avoidance patterns:
https://www.flightradar24.com/CES774/e73bf6c


There is a solid wall of thunderstorms stretching from RIX to HEL causing many deviations...

Since no one else is doing this pattern, one would not expect it to be weather avoidance, but an enroute hold.

It'a twister, Auntie Em !

SK963 now doing same:
https://www.flightradar24.com/SAS963/e74480f

Edit1: Nope, looks like it's heading back to ARN. Eventful day in these parts...
Edit2: Now in hold about 50km East or ARN at FL120, probably dumping fuel

Huge squall line stretching from Southern Finland all the way down to Belarus this evening. Perhaps they had problems getting an entry clearance to mother Russia after such a large diversion from their original FPL route...