when was it formed?
Puerto Rico
1900 Galveston hurricane
Puerto Rico 
how does the galveston hurricane of 1900 rank among all hurricanes to hit the u.s It is the fourth-deadliest Atlantic hurricane overall. where did it hit? United States
wiki:4762265
1900 Galveston hurricane [SEP] Meteorological history
On September 1, Father Lorenzo Gangoite, the director of the Belen College Observatory in Havana, Cuba, noted that the storm was in its formative stages, with only vague indications of a small tropical cyclone to the southwest of Saint Croix. During that day, the system passed to the south of Puerto Rico before it made landfall near Baní, Dominican Republic, early on September 2. Moving west-northwestward, the storm crossed the island of Hispaniola and entered into the Windward Passage near Saint-Marc, Haiti, several hours later. The system made landfall on Cuba near Santiago de Cuba during September 3, before it moved slowly west-northwestward across the island and emerged into Straits of Florida as a tropical storm on September 5.