Choosing words to clearly describe data
blog.arria.com
blog.arria.com
Put the following into increasing order of likelihood: High, Slight, Moderate, Enhanced, Marginal
When surveyed, members of the general public most commonly sorted them: Slight, Marginal, Moderate, Enhanced, High.
Whereas the NWS intends: Marginal, Slight, Enhanced, Moderate, High.
The WaPo has an article about it from a few weeks ago.
https://www.washingtonpost.com/weather/2020/06/10/storm-pred...
1-10% chance of a nasty side-effect is high. So yeah, I'd say "common" is appropriate.