AM radio is a handy thing to have on any trip. At my workplace lightning is the enemy. I figured out a way to track lightning storms using the AM band.
I plotted where the transmitter locations for AM stations in a wide radius around my work. I live in Niagara Falls, as such I plotted stations from Toronto (North), Hamilton and St.Catherines (West) Niagara Falls, Buffalo NY (south) and Lockport NY, (East).
The radio at work is left on a empty frequency (sound turned low). The empty frequency will be your warning that there is lightning in the area. Electrical storms from any direction will be detected.
Once detected, I flip to the different perimeter stations to determine where it is coming from.
Here is a common scenario I deal with at work.
Wind from the west, lightning detected on an empty frequency.
I first put the radio on 1150am Hamilton hear crackling.
I then put the radio to 610AM St. Catherines, no crackling yet.
I leave the radio tuned to 610AM until the storm progresses to 610's transmitter.
When I begin to hear crackling on 610AM I know it is time for me to seek shelter.
After the storm passes I tune to 1340 AM Lockport NY.
Once the crackling has ceased on that frequency I quickly tune to my perimeter stations to make sure there is nothing else coming my way.
For information on the location of radio transmitters in Canada follow this link.
http://www.broadcasting-history.ca/index.html