 A low pressure area of non @-@ tropical origins developed into Subtropical Storm Ana at 00 : 00 UTC on May 8 , while situated about 175 miles ( 280 km ) southeast of Myrtle Beach , South Carolina . The system was classified as subtropical due to its involvement with an upper trough , as well as its large wind field . Throughout the day , convection progressively increased as Ana moved north @-@ northwestward across the warm sea surface temperatures associated with the Gulf Stream . At 00 : 00 UTC on May 9 , the cyclone attained its peak intensity with maximum sustained winds of 60 miles per hour ( 95 km / h ) and a minimum barometric pressure of 998 millibars ( 29 @.@ 5 inHg ) . Six hours later , Ana transitioned into a fully tropical system . However , the storm soon began weakening after moving away from the warm waters of the Gulf Stream and increasing wind shear also contributed to the deterioration of Ana . Around 10 : 00 UTC on May 10 , the system made landfall near North Myrtle Beach , South Carolina , with winds of 45 mph ( 75 km / h ) . Ana weakened to a tropical depression just eight hours later and transitioned into a remnant low near the Delmarva Peninsula at 00 : 00 UTC on May 12 . The remnant low merged with a frontal system about 24 hours later . 
