Invest #98L SW of the Azores is also developing, and has the appearance of a tiny subtropical or tropical cyclone embedded within a large upper-level trough.
— Dr. Levi Cowan (@TropicalTidbits) October 25, 2019
Key observation from sat imagery is the banded convective core and small radius of maximum wind. Tropical-like structure. pic.twitter.com/oWurQOYX34