I don't think super storm is a bad term to use. We call the most severest of storms hurricanes/cyclones. We don't normally call them "super storms". I think

I don't think super storm is a bad term to use. We call the most severest of storms hurricanes/cyclones. We don't normally call them "super storms". I think super storm suggests a storm that is stronger than the typical storm you'd expect, but doesn't meet the normal definition of a hurricane. Yes you could potentially call a hurricane a "super storm", but not many people do. You could also call them "extreme storms" or "serious storms". Just calling this thing a "storm" I don't think does it justice, and might lull people into thinking that it's not as bad as it could be.