Convection became better organized over the center , and it is estimated the system developed into Subtropical Storm Ana early on April NUMBER@1 while located about NUMBER@2 miles -LRB- NUMBER@3 km -RRB- west of LOCATION@1 .

The storm was named Subtropical Storm Ana on April NUMBER@1 , while located about NUMBER@2 miles -LRB- NUMBER@3 km -RRB- west of LOCATION@1 .
