Here the two cells are still clearly separated, beginning to merge on the next slide. Martin Setvák

Here the two cells begin to merge, this feature might even be a trace of hook echo of the northern storm. Of course, this is Z-Max, so it can even be an artifact from higher levels, I simply can’t tell from these images. Martin Setvák

Until now the southern storm moved north, from now on it “turns” east (in next images which follow). In Z-Max there still is a “gap” between these. Martin Setvák

Here they seem to be more or less merged, but it could be the Z-Max artifact. The individual PPIs from the radar should tell us more. In the next slide the two cells are apart again. Martin Setvák

Here the two cells are distinctly separated Here the two cells are distinctly separated. I’m not sure if they indeed merged and split later on, or if this was just a “close encounter” without real merge of the two cells. If they indeed merged, perhaps the merge has intensified the circulation of the new (super)cell, resulting in cell-splitting ... Martin Setvák

Only here the northern cell begins to weaken, dissipating shortly afterwards. Martin Setvák

Here the northern cell is almost gone Here the northern cell is almost gone. Most likely, the southern storm has blocked the feeder of the northern storm. Martin Setvák