The northern lights aren't going anywhere
EXCEPT TO BEING BACK OVERHEAD OF YELLOWKNIFE MORE CONSISTENTLY
Here's what all these brand new space weather expects, who also bake delicious cupcakes, are leaving out. The sun goes through roughly 11 year sunspot cycles, and at the height of this cycle - solar maximum - the sun's surface is peppered with sometimes hundreds of sunspots, which can cause solar flares, and if we're lucky, coronal mass ejections along with them. Coronal mass ejections are often responsible for increased geomagnetic activity on earth, which is, very often, what brings the aurora down to southern latitudes. But more on this in a second.
During solar minimum, the sun has very few sunspots, and sometimes none at all, as we have seen a few times in the last year even. Without sunspots, the sun cannot release any solar flares or coronal mass ejections - which actually keeps the northern lights more closely around the polar regions, which helps explain why during solar minimum, people at southern latitudes would take notice of seeing the northern lights much less. Yellowknife, however, at 68°N geomagnetically is within a single degree of sitting directly underneath the centre of the auroral oval on nights of the most average auroral activity.
WITH STRONG GEOMAGNETIC STORMING, THE AURORAL OVAL PUSHES SOUTH
While a lot of the time this means the auroral oval merely expands over Yellowknife, it can in more extreme circumstances, leave Yellowknife (very temporarily) altogether.
What you're seeing in the image at the right (or below on mobile, thank you very much, responsive web design) is our view from Yellowknife looking south during a night of intense geomagnetic storming. Much, much further south, the aurora in these moments would be appearing as right overhead or much higher on the northern horizon - which makes the northern lights, in these circumstances, visible from places like Calgary, like Vancouver, the states of Minnesota, North Dakota etc.