ZCZC MIATCDEP4 ALL TTAA00 KNHC DDHHMM HURRICANE ILEANA DISCUSSION NUMBER 15 NWS NATIONAL HURRICANE CENTER MIAMI FL EP092012 200 AM PDT FRI AUG 31 2012 A LARGE PORTION OF THE NORTHERN SEMICIRCLE OF ILEANA IS ALREADY OVER COOLER WATERS...AND CONSEQUENTLY MOST OF THE CONVECTION IS OCCURRING IN THE SOUTHERN SEMICIRCLE. DVORAK T-NUMBERS ARE DECREASING...AND THE INITIAL INTENSITY HAS BEEN LOWERED TO 65 KNOTS. GIVEN THAT ILEANA WILL CONTINUE TO MOVE TOWARD LOWER SEA SURFACE TEMPERATURES AND BECOME INVOLVED WITH STABLE AIR...THE NHC FORECAST CALLS FOR WEAKENING. ILEANA IS MOVING TOWARD THE NORTHWEST OR 320 DEGREES AT 10 KNOTS. TRACK MODELS ARE NOT IN AGREEMENT AT ALL...WITH SOME MOVING ILEANA NORTHWARD AND OTHERS KEEPING THE CYCLONE WESTWARD. SINCE ILEANA IS FORECAST TO WEAKEN AND BECOME A SHALLOW CYCLONE...THERE IS A STRONG LIKELIHOOD THAT IT WILL TURN WESTWARD STEERED BY THE LOW-LEVEL FLOW UNTIL DISSIPATION. FORECAST POSITIONS AND MAX WINDS INIT 31/0900Z 21.8N 114.8W 65 KT 75 MPH 12H 31/1800Z 22.5N 115.5W 60 KT 70 MPH 24H 01/0600Z 23.1N 116.6W 50 KT 60 MPH 36H 01/1800Z 23.5N 118.0W 40 KT 45 MPH 48H 02/0600Z 24.0N 119.5W 30 KT 35 MPH 72H 03/0600Z 24.5N 122.0W 25 KT 30 MPH...POST-TROP/REMNT LOW 96H 04/0600Z 24.5N 124.0W 20 KT 25 MPH...POST-TROP/REMNT LOW 120H 05/0600Z 24.5N 126.5W 20 KT 25 MPH...POST-TROP/REMNT LOW $$ FORECASTER AVILA NNNN
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Page last modified: Monday, 31-Dec-2012 12:10:28 UTC