Auroras are amazing sites because they are, of course, impossible. When Amanda and I got married a year or so ago in northern Minnesota, there was an amazing Aurora, surpassing what anyone at the wedding had ever seen in the state. Big colored curtains of light.
Tonight, and over the weekend, the northern lights will be majorly large and extensive, and visible from very far away. The the graph above (from here) gives you an indication of where you might see them. Anywhere north of the solid green line has a chance, depending on local conditions.