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.
1899 San Ciriaco hurricane
Thereafter, the storm strengthened and reached winds of 70 mph (110 km/h) early on August 4. Intensification halted until late on the following day, at which time the storm reached hurricane status. Around 18:00 UTC on August 6, it became a Category 2 hurricane. Early the next day, the system deepened to a Category 3. While approaching the Lesser Antilles, it continued to strengthen, reaching Category 4 status around midday on August 7. Shortly thereafter, the hurricane passed through the Lesser Antilles and made landfall on Guadeloupe. At 18:00 UTC on August 7, the system attained its peak intensity with a maximum sustained wind speed of 150 mph (240 km/h) and a minimum barometric pressure of , observed by a weather station on Montserrat.