Subtropical Storm Karen (2025)

Storm Active: October 9-

Around October 8, a non-tropical low pressure system formed well to the northwest of the Azores. The low quickly separated from the surrounding fronts and developed a tiny warm core, embedded in a larger upper-level trough. These characteristics, along with gale force winds, led to the designation of Subtropical Storm Karen late on October 9. This was the northernmost formation by an Atlantic tropical or subtropical cyclone on record, at 44.5°N.

As of 11:00am EDT on October 10, 2025, Subtropical Storm Karen had sustained winds of 45 mph, a central pressure of 998 mb, and was moving northeast at 13 mph.