The origins of Hurricane Olga were from the interaction of a cold front and a small weather disturbance in the north Atlantic Ocean, producing an extratropical low east of Bermuda on November 22. The low gradually intensified and acquired subtropical characteristics, developing an area of convection east of the center and accompanied by a large area of gale-force winds. By 0000 UTC on November 24, the system organized enough to be classified as Subtropical Storm Two, while located about 900 mi (1450 km) east-southeast of Bermuda. Subsequently, the convection markedly increased and became more concentrated, with hints of an eye feature. Within 12 hours of becoming a subtropical, it is estimated the cyclone transitioned into Tropical Storm Olga; however, it was not purely tropical, due to being positioned beneath an upper-level low. Operationally, the National Hurricane Center (NHC) did not initiate advisories until nine hours later, referring to it as Subtropical Storm Two for two more days.