No luck
I have looked diligently for the story behind these photos but have thus far been unsuccessful. Any information of the sort is probably censored due to concerns of national security.
You are correct, this is a funnel cloudski and not a twisterski, but the more I look at it I wonder if it is really just a landspoutski. I am not familiar with extreme weather in that part of the world, other than blizzards, and I wonder just how rare a phenomenon this is. High latitudes for this sort of thing, and St. Petersburg is hardly an Oklahoma City.
Heh - maybe that is why the photographer appears to have been so close; he didn't know what this was or could soon become.