BROAD UPPER LEVEL TROUGHING IS NOTED ON WATER VAPOR IMAGERY ACROSS THE WESTERN NORTH ATLC THIS MORNING THAT SUPPORTS A 1005 MB GALE FORCE SURFACE LOW CENTERED NEAR 36N63W. THIS SLIGHTLY OCCLUDED LOW EXTENDS A COLD FRONT FROM 37N61W TO 34N60W TO 31N61W WITH SCATTERED SHOWERS AND ISOLATED TSTMS OCCURRING WITHIN 240 NM EAST OF THE COLD FRONT AND ISOLATED SHOWERS AND TSTMS CLOSER TO THE LOW CENTER OCCURRING WITHIN 90 NM OF CENTER. THIS LOW IS EXPECTED TO DRIFT NORTHEASTWARD OVER THE NEXT FEW DAYS AND HAS THE POSSIBILITY TO ACQUIRE SUBTROPICAL CYCLONE CHARACTERISTICS. THIS SYSTEM HAS A MEDIUM CHANCE...30 PERCENT... OF BECOMING A SUBTROPICAL OR TROPICAL CYCLONE DURING THE NEXT 48 HOURS.