CI is not influenced by LFs, itīs the other way around. Just talking of LF bares no information for others, only percentage of transportated demand with or without competition. PAX decide to take your offer according CI,RI,fare and other factors weighing it against competition offer. If overall demand isnīt big enough to fill your aircraft in the first place, you just can do anything and wonīt fill it.....bad weather influences your CI ; as long delays continue, it will drop further, and only thing you can do is more marketing to buffer effects.Then again, pure numbers tell us nothing, marketing effects rely on the percentage of income you use for it, for whatever kind of marketing (campaign descriptions are purely cosmetic.)
If weather comes back to normal, your CI will climb again with every week without much delay anyway, be patient, there will be a spring every year !