1899 San Ciriaco hurricane
The hurricane weakened slightly while moving west-northward across the Caribbean Sea and made landfall in Guayama, Puerto Rico late on August 8 with winds of 140 mph (220 km/h). August 8 was the namesday of Saint Cyriacus, hence the hurricane's nickname. Several weather stations across the island reported low barometric pressures, with a reading as low as in Guayama. Wind shifts were also experienced across the island, primarily in the south and the west. The storm crossed Puerto Rico in approximately six hours and emerged into the Atlantic Ocean late on August 8, while weakening to a Category 3 hurricane, with winds decreasing to 120 mph (195 km/h). The hurricane would maintain this intensity for more than nine days. Continuing west-northward, the hurricane brushed the north coast of Dominican Republic on August 9. Thereafter, the system moved slowly northwestward through the Bahamas, striking Inagua on August 10 and Andros Island on August 12. According to telephone and telegraph reports from the Weather Bureau, the storm was predicted to make landfall in Florida.
1979 Atlantic hurricane season
Around midday on September 4, Frederic made landfall in Humacao, Puerto Rico with winds of 50 mph (85 km/h). Flooding on the island forced over 6,000 people to flee their homes in search of shelter. Numerous roads were closed due to landslides and inundation. At least nine cities experienced flooding. After crossing Puerto Rico, Frederic briefly re-emerged into the Caribbean Sea, before making landfall near Santo Domingo, Dominican Republic with winds of 45 mph (75 km/h) at 00:00 UTC on September 6. Minimal impact was reported in that country, though heavy rainfall, exceeding in some places, compounded damage inflicted by Hurricane David. Frederic weakened further while crossing Hispaniola. Later on September 6, the system briefly re-emerged into the Atlantic Ocean, but land interaction with the island weakened it to a tropical depression. The storm crossed the Windward Passage and then made landfall in southeastern Guantánamo Province of Cuba early on September 7. Due to the weak nature of Frederic, minimal impact was reported. It then moved along, or just offshore the southern coast of Cuba. While situated south of Matanzas Province early on September 9, the system re-strengthened into a tropical storm. Despite land interaction with Cuba, Frederic continued to intensify.