a normal la nina pattern would have this precipitation event rush through the detroit-quebec city corridor, up the st lawerence seaway, but the jet stream is pushed north here so that it's happening across lake superior and up into james bay instead.
that's the shift here. ymmv.
it would mean more water into the ottawa river and increased flooding in ottawa and montreal, but whether the rain falls into lake superior or lake erie is likely trivial, from where i am.