WEBF, I think you're correct - The CDG has had a number of down days due to technical faults during the campaign. I think the only sorties lost due to sea state have been AH off OCEA.
However, while we're on the subject, where are people getting their figures for CDG from? This figure of 30-40 sorties per day and 30% of the air power in no way stacks up with what we're putting on the ATO each day. Try about a sixth of each figure.