Graybeard,
the tilt should have been pointed down into the wet part of the storm, moving the tilt up and down to see maximum return
I commented on this simple and effective procedure in a post some weeks ago.
In most of cases doing that you will be able to fully "characterize" the WX pattern ahead for an adequate "decision making/risk taking" by scanning from sea level to your FL.
And this possibility certainly they had in advance.