ZCZC MIATCDAT5 ALL TTAA00 KNHC DDHHMM HURRICANE JEANNE DISCUSSION NUMBER 22 NATIONAL WEATHER SERVICE MIAMI FL 11 PM EDT SAT SEP 26 1998 THE CENTER IS NOT WELL DEFINED IN GEOSTATIONARY SATELLITE IMAGERY BUT THE LOW-LEVEL CENTER APPEARS TO BE EMBEDDED WITHIN THE CENTRAL DENSE OVERCAST. AN SSM/I PASS FROM 26/2215Z CAUGHT ABOUT HALF OF THE CIRCULATION...AND HELPS A LITTLE WITH THE LOCATION. INITIAL INTENSITY IS INCREASED TO 70 KNOTS WHICH IS A COMPROMISE BETWEEN VARIOUS SATELLITE ESTIMATES. THE ENVIRONMENT IS NOT PARTICULARLY HOSTILE...SO SOME ADDITIONAL STRENGTHENING IS FORECAST UNTIL THE SYSTEM MOVES OVER COOLER WATER. INITIAL MOTION ESTIMATE IS 340/10. JEANNE IS BEING STEERED AROUND THE WESTERN PERIPHERY OF A MID-LEVEL ANTICYCLONE...AND IS ABOUT TO BE INFLUENCED BY A BROAD MID- TO UPPER-LEVEL TROUGH TO THE WEST. RECURVATURE WITH ACCELERATION IS FORECAST. THE CURRENT TRACK IS BASICALLY AN UPDATE OF THE PREVIOUS PACKAGE AND IS A REASONABLE BLEND OF THE GUIDANCE. MAYFIELD FORECAST POSITIONS AND MAX WINDS INITIAL 27/0300Z 23.8N 41.7W 70 KTS 12HR VT 27/1200Z 25.2N 42.0W 75 KTS 24HR VT 28/0000Z 28.0N 41.0W 75 KTS 36HR VT 28/1200Z 32.0N 39.0W 75 KTS 48HR VT 29/0000Z 36.0N 35.0W 70 KTS 72HR VT 30/0000Z 40.0N 23.0W 55 KTS NNNN