![]() |
HOME |
ACTIVE CYCLONES |
FORECASTS | IMAGERY | ABOUT TPC | RECONNAISSANCE |
---|
ZCZC MIATCDEP2 ALL TTAA00 KNHC DDHHMM HURRICANE BEATRIZ DISCUSSION NUMBER 14 NATIONAL WEATHER SERVICE MIAMI FL 8 AM PDT MON JUL 12 1999 INFRARED SATELLITE IMAGERY SINCE 10Z INDICATES THAT THE EYE OF BEATRIZ HAS BECOME A LITTLE LESS DISTINCT...AND THE SURROUNDING DEEP CONVECTION HAS BECOME ASYMMETRIC. IT IS UNCLEAR WHETHER THIS IS DUE TO A CONCENTRIC EYEWALL CYCLE OR A PEAKING OF THE CYCLONE DUE TO INTERACTION WITH COLDER WATER. DVORAK INTENSITY ESTIMATES ARE T5.5 FROM SAB AND T5.0 FROM TAFB AND AFWA. BASED ON THE ABOVE...THE INITIAL INTENSITY REMAINS AT 90 KT. THE INTENSITY FORECAST IS SLIGHTLY CHANGED FROM THE PREVIOUS PACKAGE...WITH LITTLE CHANGE IN STRENGTH THROUGH 36 HOURS FOLLOWED BY GRADUAL WEAKENING DUE TO COLDER WATER AND POSSIBLE SHEAR. ANY MOTION NORTH OF THE CURRENT FORECAST TRACK WOULD LIKELY CAUSE A FASTER WEAKENING OVER COLDER WATER. THE INITIAL MOTION IS 275/10. TRACK FORECAST GUIDANCE IS SCATTERED AROUND A GENERAL WEST-NORTHWEST TRACK...WITH THE BAMS...BAMM...AND P91E MORE TO THE WEST AND THE NOGAPS AND GFDL OFF TO THE NORTHWEST. THE 06Z GFDL IS TO THE RIGHT OF ALL OTHER GUIDANCE...CALLING FOR A NORTHWEST TURN AFTER 12 HOURS. THIS APPEARS TO BE TOO SOON BASED ON THE STRONG RIDGE SEEN IN WATER VAPOR IMAGERY AND VARIOUS MODEL HEIGHT FIELDS. THE OFFICIAL FORECAST IS SIMILAR...BUT SLIGHTLY NORTH OF...THE PREVIOUS PACKAGE. IT CALLS FOR A WESTWARD MOTION THROUGH 24 HOURS AND A WEST-NORTHWEST MOTION THEREAFTER. SOME DECREASE IN FORWARD MOTION IS LIKELY AFTER 48 HOURS AS THE RIDGE TO THE NORTH WEAKENS. BEVEN/LAWRENCE FORECAST POSITIONS AND MAX WINDS INITIAL 12/1500Z 14.3N 118.8W 90 KTS 12HR VT 13/0000Z 14.5N 120.4W 90 KTS 24HR VT 13/1200Z 15.0N 122.7W 90 KTS 36HR VT 14/0000Z 15.4N 124.9W 90 KTS 48HR VT 14/1200Z 16.0N 127.0W 85 KTS 72HR VT 15/1200Z 17.0N 130.0W 75 KTS NNNN