Question: Meteorologist Robert case is best known for naming the fourth hurricane and final tropical cyclone is the 1991 hurricane season in what ocean?
Sentence (from "1991 Perfect Storm"): On November 1 the system evolved into a full-fledged hurricane with peak winds of 75 miles per hour (120 km/h), although the National Hurricane Center left it unnamed to avoid confusion amid media interest in the predecessor extratropical storm.
Relevant evidence: No