Tropical Storm Keith struck the Continental United States later in the calendar year than any tropical cyclone since the 1925 Atlantic hurricane season. The nineteenth tropical depression and eleventh named storm of the 1988 Atlantic hurricane season, Keith developed out of a tropical wave in the Caribbean Sea on November 17. It tracked northwestward, and under generally favorable conditions, Keith reached a peak intensity of  shortly before striking the northeastern tip of the Yucatán Peninsula.
Tropical Storm Keith was the last to hit the United States during the 1988 Atlantic hurricane season, occurring later than any other tropical cyclone since the 1925 season. The nineteenth tropical depression and eleventh named storm of that year, Keith formed from a wave in the Caribbean Sea on November 17. It moved northwestward under favorable conditions and reached its peak intensity shortly before striking the northeastern tip of the Yucatán Peninsula.