Hurricane Dora
Later on September 7, Dora re-strengthened into a Category 3 hurricane. Approaching the east coast of Florida, Dora's motion became erratic, making a few cyclonic loops. Around 04:00 UTC on September 10, the hurricane made landfall near St. Augustine, Florida, with winds of 115 mph (185 km/h). Two hours later, Dora weakened to a Category 2 hurricane. However, deterioration then slowed, with the hurricane falling to tropical storm intensity over Jefferson County on September 11. Dora then briefly drifted over southwestern Georgia, until turned east-northeastward late the next day. Early on September 14, the storm re-emerged into the Atlantic Ocean near Cape Hatteras, North Carolina, and transitioned into an extratropical cyclone several hours later. The remnants of Dora moved rapidly northeastward and dissipated offshore Newfoundland early on September 16.
Hurricane Donna
On August 29, a tropical wave exited the west coast of Africa near Dakar. That day, it is estimated a tropical depression developed along the wave southeast of Cape Verde. There was a lack of data for several days, but it is estimated that the system gradually intensified. On September 2, ships in the region suggested there was a tropical storm after reporting winds of over 50 mph (80 km/h). That day, the Hurricane Hunters flew into the system and observed a well-defined eye, along with winds of . Based on the data, the United States Weather Bureau office in San Juan, Puerto Rico, initiated advisories on Hurricane Donna at 22:00 UTC on September 2, about east of the Lesser Antilles. It is estimated that the storm attained hurricane status a day prior. The Azores High to the north was unusually powerful, which caused Donna to move to the west-northwest. When advisories began, Donna was intensifying into a major hurricane, which is the equivalent of a Category 3 or higher on the Saffir-Simpson hurricane wind scale; it would ultimately maintain this status for nearly eight days.