in addition to the seven tropical storms, four tropical depressions developed and remained below tropical storm intensity. the first formed from an extratropical cyclone well to the southwest of the azores on april 4. the depression moved southwestward until being by a frontal boundary on april 6. by september 25, another tropical depression developed from a formerly extratropical cyclone about halfway between bermuda and the azores. however, on september 27, the depression lost tropical characteristics again. the next tropical depression formed on october 17 to the southeast of bermuda. moving generally northwestward, the depression transitioned into an extratropical cyclone by october 21. the final non-developing depression formed from an extratropical cyclone to the west of the canary islands on november 7. the depression tracked generally westward before being absorbed by a frontal system on november 11.