Final answer:
The supplied text does not provide a specific metaphor describing old Okeechobee in 'Their Eyes Were Watching God.' However, Hurston's use of natural metaphors typically underscores the inner journey of her characters.
Step-by-step explanation:
In Zora Neale Hurston's critically acclaimed novel Their Eyes Were Watching God, the metaphor used to describe old Okeechobee is not explicitly provided in the text excerpts supplied. However, based on Hurston's literary style, metaphors in the novel often relate to nature and convey the characters' internal experiences and transformations. For instance, Janie Crawford, the protagonist, experiences self-actualization and empowerment through her connections with the natural world around her. Hurston's portrayal of the inner strength of her characters and their discovery of self-love are significant themes throughout her works.