Complex sentence: The intense hurricane made landfall at that intensity near Chetumal, Mexico on September 28, weakening over the Yucatán Peninsula before moving into the Bay of Campeche, where it slightly strengthened before making its final landfall near Veracruz on September 29.
Split into simpler sentences: The intense hurricane made landfall at that intensity near Chetumal, Mexico on September 28. 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.