▁n ortheast ▁and ▁the ▁circul ation ▁occasionally ▁becoming ▁poor ly ▁defined . ▁Despite ▁continued ▁predictions ▁of ▁intens ification ▁into ▁a ▁powerful ▁h urr icane , ▁Karl ▁instead ▁succ um bed ▁to ▁the ▁host ile ▁conditions ▁and ▁weak ened ▁to ▁a ▁tropical ▁de pression ▁around ▁ 0 6 : 0 0   UTC ▁on ▁September   2 1 ▁as ▁it ▁passed ▁close ▁to ▁an ▁upper - level ▁low . ▁However , ▁by ▁the ▁following ▁day , ▁the ▁upper - level ▁low ▁moved ▁away ▁to ▁the ▁south , ▁causing ▁a ▁reduction ▁in ▁she ar ▁that ▁allowed ▁the ▁system ▁to ▁re att ain ▁tropical ▁storm ▁intensity ▁as ▁it ▁cur ved ▁near ▁B erm uda . ▁Acc eler ating ▁east - n ortheast wards , ▁Karl ▁continued ▁to ▁strength en ▁and ▁it ▁att ained ▁peak ▁wind s ▁of ▁ 7 0   m ph ▁( 1 1 0   km / h ) ▁early ▁on ▁September   2 5 . ▁However , ▁cold ▁air ▁enc ro ached ▁on ▁the ▁low - level ▁circul ation ▁by ▁ 1 2 : 0 0   UTC ▁that ▁day , ▁mark ing ▁Karl ' s ▁transition ▁to ▁an ▁extr at rop ical ▁cy clone . ▁Karl ' s ▁rem nant ▁low ▁continued ▁n ortheast ▁over ▁the ▁North ▁Atlantic ▁and ▁was ▁absor bed ▁by ▁another ▁extr at rop ical ▁system ▁early ▁on ▁September   2 6 . ▁ ▁In ▁B erm uda , ▁about ▁ 8 0 0   people ▁lost ▁power ▁indirect ly ▁from ▁the ▁storm ▁due ▁to ▁a ▁main line