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ZCZC MIATWOAT ALL TTAA00 KNHC DDHHMM TROPICAL WEATHER OUTLOOK NWS NATIONAL HURRICANE CENTER MIAMI FL 200 PM EDT SUN OCT 21 2012 FOR THE NORTH ATLANTIC...CARIBBEAN SEA AND THE GULF OF MEXICO... 1. A BROAD AREA OF LOW PRESSURE...ASSOCIATED WITH A TROPICAL WAVE...IS PRODUCING A LARGE AREA OF SHOWERS AND THUNDERSTORMS OVER THE CENTRAL CARIBBEAN SEA. ENVIRONMENTAL CONDITIONS ARE EXPECTED TO BE CONDUCIVE FOR THE FORMATION OF A TROPICAL DEPRESSION DURING THE NEXT COUPLE OF DAYS...AND THIS SYSTEM HAS A HIGH CHANCE...70 PERCENT...OF BECOMING A TROPICAL CYCLONE DURING THE NEXT 48 HOURS AS IT MOVES SLOWLY WESTWARD AND BECOMES NEARLY STATIONARY WELL SOUTH OF JAMAICA. HEAVY RAINS FROM THIS DISTURBANCE ARE LIKELY TO SPREAD OVER JAMAICA...HISPANIOLA...AND EASTERN CUBA OVER THE NEXT SEVERAL DAYS. THESE RAINS COULD PRODUCE LIFE-THREATENING FLASH FLOODS AND MUD SLIDES...ESPECIALLY IN AREAS OF HIGH TERRAIN. 2. A TROPICAL WAVE INTERACTING WITH AN UPPER-LEVEL LOW IS PRODUCING A SMALL AREA OF SHOWERS AND A FEW THUNDERSTORMS OVER THE CENTRAL ATLANTIC ABOUT 850 MILES EAST-NORTHEAST OF THE LEEWARD ISLANDS. ENVIRONMENTAL CONDITIONS ARE EXPECTED TO BE CONDUCIVE FOR SOME DEVELOPMENT BEFORE UPPER-LEVEL WINDS STRENGTHEN ON TUESDAY. THIS SYSTEM HAS A MEDIUM CHANCE...30 PERCENT...OF BECOMING A TROPICAL CYCLONE DURING THE NEXT 48 HOURS AS IT MOVES NORTHWESTWARD TO NORTH- NORTHWESTWARD AT ABOUT 10 MPH. ELSEWHERE...TROPICAL STORM FORMATION IS NOT EXPECTED DURING THE NEXT 48 HOURS. $$ FORECASTER BERG NNNN
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