Sounds like a sinus trigger to me. This is one of my worst triggers. Changes in temperature and storms brings them on for me. Both causes my sinuses to swell and triggers migraines. I've had sinus surgery. My sinus problems are bad. For me, I have to stay on Nasacort twice a day. If a migraine is starting, sometimes I can use Afrin to ward it off... If I'm quick enough it doesn't deteriorate to the full blown naseous, sick all day migraines. Just don't use Afrin for more than three days in a row. It can have a rebound effect.