On September 20, 2022, the National Hurricane Center (NHC) began monitoring a tropical wave over West Africa for possible tropical cyclogenesis. Traveling west, the wave eventually emerged over the far eastern Atlantic Ocean on September 22. With favorable environmental conditions, including high sea surface temperatures, sufficient atmospheric moisture and instability, steady development was anticipated. Scattered convection, some of it intense, accompanied the system. A broad area of low pressure consolidated within this wave early on September 23. The low moved north-northwest in response to a break in the eastern Atlantic subtropical ridge created by an upper-level trough. Throughout the day, convection organized into banding patterns and the low's center became more defined. In light of the increased organization, the NHC classified the system as Tropical Depression Ten at 12:00 UTC with the cyclone centered east-northeast of the Cabo Verde Islands. A burst of convection on the cyclone's eastern side signaled the depression's intensification into a tropical storm late on September 23. Upon attaining gale-force winds, the NHC assigned it the name Hermine. Its maximum sustained winds peaked at and pressure bottomed out at Aircraft reconnaissance from NASA's Convective Processes Experiment-Cabo Verde recorded a central pressure of several hours later just outside the center, providing evidence for this estimation.
