 A tropical wave moved through the Lesser Antilles on September 30. It moved westward through the Caribbean, developing a broad circulation by October 3 as it approached Jamaica. The weak circulation gradually became better organized, developing into a tropical depression near the Cayman Islands on October 4. The system quickly intensified into Tropical Storm Janice as it moved toward the coast of Cuba. An eastward-moving cold front turned the storm to the north and northeast, and Janice crossed central Cuba early on October 6. The storm intensified while moving through the Bahamas, becoming a hurricane on October 7. Janice slowed that day and reached peak winds of 100 mph (155 km / h). On October 9, the hurricane turned to the east-northeast, and by that time had weakened slightly; however, the next day it re-attained its previous peak intensity while passing northwest of Bermuda, reaching a minimum pressure of 968 mbar (28.6 inHg). On October 12, Janice became extratropical in the northern Atlantic Ocean, and the next day merged with a stronger non-tropical low offshore Atlantic Canada.
