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.
September 1921 San Antonio floods
Shortly after, the hurricane made landfall south of Tampico, Mexico near La Leja at 0300 UTC on September 27. At the time, the cyclone had maximum sustained winds of 80 mph (130 km/h), making it a Category 1 on the modern-day Saffir–Simpson hurricane wind scale. The storm's minimum barometric pressure at landfall was 985 mbar (hPa; 29.10 inHg); this would be the lowest pressure estimated in association with the storm, though it was not included in HURDAT. Just prior to landfall at 0100 UTC, a ship had reported winds of 80 mph (130 km/h) from the southeast and a pressure of 996 mbar (hPa; 29.42 inHg). Upon landfall, a barometer in Tampico reported a minimum pressure of 1003 mbar (hPa; 29.62 inHg). The Signal Corps map of the cyclone for September 7 indicated a pressure of at least 1007.5 mbar (hPa; 29.75 inHg) for the storm's outermost closed isobar, with a storm of similar nature positioned a short distance west of Jalisco, Mexico in the eastern Pacific Ocean. Once inland, the hurricane weakened, and made a northward curve before degenerating into a remnant low after 0600 UTC on September 8. The remnant low progressed northward, and moved into Texas from the state border with Mexico near Webb County. In Texas, moisture associated with the system and other contributing forces produced excessive rainfall over Central Texas, causing numerous rivers to overflow.
Despite making landfall on Tamaulipas, its impact in Mexico, if any, remains unknown. However, the decaying remnants of the hurricane moved northward as the result of a retrograding high-pressure area over East Texas, helping to produce torrential precipitation across South and Central Texas. The area of high-pressure was a westward extension of the Bermuda High, which is typically centered in the Central Atlantic. The pressure anomaly provided an abundant moisture supply to the region, increasing convergence. In addition, a separate tropical cyclone located near Barbados was able to alter the positioning of isobars over the area, such that heavy rainfall would result. Precipitation was further aided by the Balcones Escarpment and Edwards Plateau, which provided orographic lift. The rains caused severe flooding, particularly to low-lying areas.