Who is Shorty from My Louisiana Sky and what is their importance?

Shorty worked with Lonnie at Thompson's Nursery. He is described as an unkind man who regularly mocks Lonnie. When Lonnie tells Mrs. Thompson that a storm is imminent, Shorty is appalled that Mrs. Thompson actually believes him. Over time, Mrs. Thompson grows tired of Shorty's disrespect and orders him to leave the property.