The northern lights might be seen as far south as Toronto (and beyond) tonight as a major geomagnetic storm has crashed into the earth. The KP Index, a measure of geomagnetic activity could run as high as 7 tonight in sub auroral regions. That makes it very likely that you'll be able to see auroras if you get away from the light pollution of the city.

Add to the stormy geomagnetic activity a forecast for clear skies around the Toronto region, and this is a very rare opportunity indeed. Use this light pollution map to chart the best place to head to so as to maximize your chances of seeing the northern lights. Remember to look north near the horizon as at our latitude they will not appear very high in the sky. No binoculars are necessary.

Photo by Andrew Morse on Flickr