 Hurricane Janet was the most powerful tropical cyclone of the season and one of the strongest Atlantic hurricanes on record . The hurricane formed from a tropical wave east of the Lesser Antilles on September 21 . Moving toward the west across the Caribbean Sea , Janet fluctuated in intensity , but generally strengthened before reaching its peak intensity as a Category 5 hurricane on the Saffir – Simpson hurricane scale with winds of 175 mph ( 280 km / h ) . The intense hurricane made landfall at that intensity near Chetumal , Mexico on September 28 . Janet 's landfall as a Category 5 hurricane on the Yucatán Peninsula marked the first recorded instance that a storm of such intensity in the Atlantic basin made on a continental mainland , with all previous storms making landfall as Category 5 hurricanes on islands . After weakening over the Yucatán Peninsula , it moved into the Bay of Campeche , where it slightly strengthened before making its final landfall near Veracruz on September 29 . Janet quickly weakened over Mexico 's mountainous terrain before dissipating on September 30 . 
 Hurricane Janet was the most powerful tropical cyclone of the season and one of the strongest Atlantic hurricanes on record . The hurricane formed from a tropical wave east of the Lesser Antilles on September 21 . Moving toward the west across the Caribbean Sea , Janet fluctuated in intensity , but generally strengthened before reaching its peak intensity as a Category 5 hurricane on the Saffir – Simpson hurricane scale with winds of 175 mph ( 280 km / h ) . The intense hurricane made landfall at that intensity near Chetumal , Mexico on September 28 . Janet <a href='null_genetive' title='1'><mark>'s</mark></a>landfall as a Category 5 hurricane on the Yucatán Peninsula marked the first recorded instance that a storm of such intensity in the Atlantic basin made on a continental mainland , with all previous storms making landfall as Category 5 hurricanes on islands . After weakening over the Yucatán Peninsula , it moved into the Bay of Campeche , where it slightly strengthened before making its final landfall near Veracruz on September 29 . Janet quickly weakened over Mexico <a href='null_genetive' title='2'><mark>'s</mark></a>mountainous terrain before dissipating on September 30 . 
Hurricane Janet was da most powerful tropical cyclone of tdaseason and one of thdatrongest Atlantic hurricanes on record . The hurricane formed from a tropical wave east of thedasser Antilles on September 21 . movin toward the dat across the Cdabbean Sea , Janet fluctuated in intensity , but generally strengthened before reachin its peak intensity as a Category 5 hurricane on the Saffir – Simpson hurricane scale with winds of 175 mph ( 280 km / h ) . The indase hurricane made landfall at that intensity near Chetumal , Mexico on September 28 . Janet  landfall as a Category 5 hurricane on the Yucdan Peninsula marked the firsdaecorded instance dat a storm of such intensity in the Atlantic basin made on a continental mainland , witt all previous storms making landfall as Category 5 hurricanes on islands . After weakening over the YucatdaPeninsula , it moved into the Bay ofdampeche , where it slightly strengthened b4 makin its final landfall near Veracruz on September 29 . Janet quickly weakened ova Mexico  mountainous terrain before dissipating on September 30 .