This storm is an example for tropical transition; A extratropical cyclone has acquired warm core and become in Subtropical and successively in a tropical cyclone (for example tropica cyclone Karl, Grace, Vince it derived from tropical transition).
It Probably a Tropical Storm intensity.

Mediterranean Sea:

   DATE/TIME     LAT      LON      CLASSIFICATION       STORM
  07/1200 UTC   40.6N      5.9E        ST1.5           INVEST 

Latest satellite data reveals a gradually better organized depression in the western Mediterranean. The center is at least partially covered by a central dense overcast feature with strong pulsating cells especially along the northern/eastern part. It still ingests a somewhat more stable/dry air mass from the south with a diminishing trend, so conditions look promising for further organization. Latest ASCAT data indicates a broad and asymmetric wind field with maxima still displaced from the center, which is typical for an organizing subtropical cyclone (in the range of 30-35 kt). Phase diagrams also support that this depression continued to structure its shallow warm core during the past 12 h and indicates further organization for the upcoming 24 h. Using the Hebert Poteat technique and keeping in mind the better organized structre of the main band and deeper/somewhat more persisting DMC along the center, a classification of ST 2.5 would be a reasonable, although probably quite an optimistic guess, given still transientness of the convection ( ST 2.5 represents an intensity of 35-40 kt). It has to be stressed out that no real time surface data is present to support that intensification rating.