When jumping from Verasi L15 to ... uhm somewhere I got stormed in sector D4. Everything was as usual (glowy balls, message in mission tab, mean bots...) _except_ there was no exit point neither in the radar nor the HUD.
I could leave the Sector as if it was a normal sector (3km from a large object).

I jumped in soon after you mentioned this mr_spuck, and there was no storm in sector D4. My guess is that the storm died just after you entered the sector, but the "glowy balls" animation remained until you jumped out. Perhaps it's a lag issue, or just a graphical oversight?

Hmm ... possible. My load times were pretty long at the time. The storm might even have disappeared while it was still loading. I should have gone back again.