000 ABNT20 KNHC 281155 TWOAT TROPICAL WEATHER OUTLOOK NWS NATIONAL HURRICANE CENTER MIAMI FL 700 AM EST THU NOV 28 2013 FOR THE NORTH ATLANTIC...CARIBBEAN SEA AND THE GULF OF MEXICO... SHOWER AND THUNDERSTORM ACTIVITY IN ASSOCIATION WITH A SURFACE TROUGH LOCATED OVER THE EASTERN ATLANTIC HAS BEEN INCREASING OVER THE PAST SEVERAL HOURS. A NON-TROPICAL LOW PRESSURE SYSTEM IS FORECAST TO DEVELOP IN THIS AREA DURING THE NEXT COUPLE OF DAYS... AND THE LOW COULD GRADUALLY ACQUIRE SUBTROPICAL CHARACTERISTICS OVER THE WEEKEND AS IT MOVES GENERALLY NORTHEASTWARD. THIS SYSTEM HAS A LOW CHANCE...20 PERCENT...OF BECOMING A SUBTROPICAL CYCLONE DURING THE 48 HOURS...AND A MEDIUM CHANCE...30 PERCENT...OF BECOMING A SUBTROPICAL OR TROPICAL CYCLONE DURING THE NEXT 5 DAYS. && FIVE-DAY FORMATION PROBABILITIES ARE EXPERIMENTAL IN 2013. COMMENTS ON THE EXPERIMENTAL FORECASTS CAN BE PROVIDED AT... HTTP://WWW.NWS.NOAA.GOV/SURVEY/NWS-SURVEY.PHP?CODE=ETWO $$ FORECASTER STEWART