ZCZC MIATCDAT4 ALL TTAA00 KNHC DDHHMM HURRICANE IVAN DISCUSSION NUMBER 18 NATIONAL WEATHER SERVICE MIAMI FL 5 PM EDT THU SEP 24 1998 THE EYE HAS APPEARED OCCASIONALLY TODAY AND THERE HAS BEEN LITTLE OVERALL STRUCTURE CHANGE. IVAN REMAINS SMALL BUT INTACT...WITH WINDS NEAR 70 KT. THE MOTION IS NOW 350/12 KT AND THE GRADUAL CURVATURE TOWARD THE NORTH AND NORTHEAST SHOULD CONTINUE...AS SHOWN BY ALL AVAILABLE MODEL GUIDANCE. THE SYSTEM COULD BRING TROPICAL STORM OR HURRICANE FORCE WINDS TO THE WESTERN AZORES ON SATURDAY. RAPPAPORT FORECAST POSITIONS AND MAX WINDS INITIAL 24/2100Z 34.0N 42.4W 70 KTS 12HR VT 25/0600Z 36.0N 41.8W 70 KTS 24HR VT 25/1800Z 37.8N 40.0W 70 KTS 36HR VT 26/0600Z 39.2N 36.6W 65 KTS 48HR VT 26/1800Z 40.1N 30.5W 55 KTS...EXTRATROPICAL 72HR VT 27/1800Z 40.0N 15.0W 50 KTS...EXTRATROPICAL NNNN