Rain Coming ashore SF still heading for Saskatchewan, Canada

So, there's this atmospheric river now coming ashore in Northern California from about Santa Cruz north to maybe Marin county that is now stretched out all the way up into Saskatchewan, Canada which I think is pretty strange (even though it did this last weekend too). But, here's the thing "is it going to keep going north until it melts out the North pole or start drifting east like the last one?