What exactly causes this cutoff signal shown on the GEFS?

That's what I'm worried about. The soil is already massively saturated. The associated wind with the AR next week is going to cause even more problems. As cool as it is to witness the crazy power of nature, the negative impacts on people's lives are absolutely not cool.

That's the perfect track for my area.

In all fairness the fact that the 0z isn't completely caving to it's gin soaked afternoon counterpart seems pretty positive to me.

They're just screwing with the PNW. They know it's going to cave.