https://www.cnn.com/2020/12/09/us/no...scn/index.html
Sadly, it's not going to get to southern California, nor is that ever likely to happen.
People in the areas north of the red line above might be able to see the northern lights from December 9-11. This means cities such as Chicago, Detroit, Boston, Seattle, and perhaps Occupied Portland might get an unusual show.
It's possible GPS devices will malfunction during this time. Almost all of Alaska should get to see some really nice lights, provided it's clear. Parts of Alaska, such as Anchorage, don't get as many northern lights displays as you'd think. One of the best areas to view them is Fairbanks -- now and any time such lights are predicted.