Sounds pretty severe. I've been suffering from migraines since I was a teenager. Moving to Calgary made them worse; Chinooks are horrible. In fact, any changing atmospheric pressure (up or down) makes things worse for me. There is no cure from migraines yet, as you probably know by now. Painkillers are somewhat effective but they also weaken your brain's ability to tolerate pain and have multiple side effects. Short of real drugs, you are on the strongest stuff already, so I don't even know what to suggest other than changing climate to something more stable. I know this advice could be useless based on your personal situation but at some point you've got to choose; how much decrease in your quality and enjoyment of life you are prepared to tolerate. Sorry about your loss.
P.S. I check this site regularly:
http://www.accuweather.com/en/ca/cal...-weather/52479