ZCZC MIATCDEP5 ALL TTAA00 KNHC DDHHMM HURRICANE DANIEL DISCUSSION NUMBER 9 NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL EP052006 800 PM PDT TUE JUL 18 2006 THE HURRICANE IS CONTINUING ITS INTENSIFICATION WITH TIGHTLY-WOUND BANDS OF CONVECTION AROUND THE CENTER AND AN IMPRESSIVE OUTFLOW PATTERN. AFTER A BURST OF THUNDERSTORMS A FEW HOURS AGO...A SMALL EYE IS BECOMING MORE EVIDENT IN THE CENTRAL DENSE OVERCAST. THE INITIAL INTENSITY IS SET TO 70 KT IN BETWEEN SUBJECTIVE DVORAK CLASSIFICATIONS OF 65 KT FROM SAB/TAFB AND ADT ESTIMATES FROM CIMSS OF 72 KT. THE GLOBAL MODELS ARE UNANIMOUS IN FORECASTING A LARGE UPPER-LEVEL ANTICYCLONE NEAR DANIEL PROVIDING A LOW-SHEAR ENVIRONMENT FOR THE NEXT SEVERAL DAYS. IN ADDITION...THE SSTS ARE WARM AND SLIGHTLY ABOVE AVERAGE. ALL SIGNS POINT TO AT LEAST A STEADY INTENSIFICATION FOR THE NEXT DAY OR SO BEFORE SSTS BEGIN TO COOL. THEREAFTER... ENVIRONMENTAL CONDITIONS OF STEADY/SLIGHTLY DECREASINGLY SSTS AND LIGHT SOUTHEASTERLY SHEAR MIGHT FAVOR THE DEVELOPMENT OF AN ANNULAR-TYPE HURRICANE. THIS PATTERN COULD ALLOW DANIEL TO STAY STRONGER FOR A LONGER AMOUNT OF TIME. THE OFFICIAL INTENSITY FORECAST IS CLOSE TO THE GFDL AND FSU SUPERENSEMBLE WHICH KEEP DANIEL AS A STRONG HURRICANE THROUGHOUT THE PERIOD. DANIEL IS MOVING BASICALLY DUE WEST...ABOUT 270/10. LITTLE CHANGE WAS MADE TO THE FORECAST TRACK IN THE FIRST FEW DAYS AS MODEL GUIDANCE IS TIGHTLY CLUSTERED. THEREAFTER...THE GFS AND ITS ENSEMBLES DIVERGE A LITTLE BY MOVING DANIEL ON A MORE WEST-NORTHWESTERLY TRACK IN RESPONSE TO A DEVELOPING UPPER TROUGH ALONG ABOUT 130W. THE UKMET/NOGAPS/ECMWF CLUSTER SHOWS LESS OF A TROUGH...KEEPING THE HURRICANE ON A FARTHER SOUTH TRACK THAN THE GFS/GFS ENSEMBLES. THE OFFICIAL FORECAST WILL BE NUDGED A LITTLE SOUTH OF PREVIOUS...ALONG THE LINES OF THE ECMWF AND CLOSE TO THE MODEL CONSENSUS. FORECAST POSITIONS AND MAX WINDS INITIAL 19/0300Z 11.9N 118.4W 70 KT 12HR VT 19/1200Z 12.0N 119.9W 80 KT 24HR VT 20/0000Z 12.2N 121.5W 90 KT 36HR VT 20/1200Z 12.6N 123.3W 100 KT 48HR VT 21/0000Z 13.0N 125.0W 100 KT 72HR VT 22/0000Z 13.7N 128.5W 100 KT 96HR VT 23/0000Z 14.5N 132.0W 85 KT 120HR VT 24/0000Z 15.5N 135.5W 70 KT $$ FORECASTER BLAKE/AVILA NNNN
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Page last modified: Monday, 11-Sep-2006 11:28:40 UTC