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TROPICAL STORM GENEVIEVE DISCUSSION NUMBER 13
NATIONAL WEATHER SERVICE MIAMI FL
8 PM PDT WED AUG 28 2002
LATEST IR IMAGERY INDICATES GENEVIEVE HAS A SMALL AREA OF DEEP
CONVECTION CONFINED TO THE VICINITY OF THE LOW LEVEL CIRCULATION
CENTER. IT WOULD BE GENEROUS TO CALL THIS CONVECTIVE AREA
A CENTRAL DENSE OVERCAST. SATELLITE INTENSITY ESTIMATES FROM
TAFB...SAB AND AFWA REMAIN 65 KNOTS...BUT GIVEN THE RATHER RAGGED
APPEARANCE ON SATELLITE THE INITIAL INTENSITY WILL BE MAINTAINED
AT 60 KNOTS.
SATELLITE FIXES OVER THE PAST 3 HOURS HAVE BEEN TO THE SOUTH
OF THE PREVIOUS TRACK AND THE INITIAL MOTION IS SLIGHTLY TO THE
LEFT...300/11. THE FORECAST TRACK IS TO THE LEFT OF THE PREVIOUS
PACKAGE GIVEN THE RECENT TRENDS. OVERALL THERE IS LITTLE CHANGE IN
SYNOPTIC REASONING AS GENEVIEVE IS EXPECTED TO MOVE NORTHWEST
TOWARD COOLER WATERS. BEYOND 48 HOURS...THE CYCLONE WEAKENS AND
TURNS TO THE LEFT...MORE INFLUENCED BY THE LOW-LEVEL FLOW.
THE OUTFLOW PATTERN IS IMPROVING AND CONTINUES TO EXPAND OVER THE
SOUTHERN SEMICIRCLE...AN INDICATION THAT THE SHEAR MAY BE LESSENING
OVER THE SYSTEM. GENEVIEVE HAS ABOUT 12 HOURS OVER 26-27C SSTS
BEFORE CROSSING INTO COOLER WATERS. IT IS STILL POSSIBLE
FOR GENEVIEVE TO REACH HURRICANE STRENGTH WITHIN THIS TIME
...BUT THIS IS NOT REFLECTED IN THE INTENSITY FORECAST.
STEADY WEAKENING IS EXPECTED AFTER 12 HOURS AND GENEVIEVE IS
FORECAST TO WEAKEN TO A TROPICAL DEPRESSION BY THE END OF THE
PERIOD.
FORECASTER BEVEN/COBB
FORECAST POSITIONS AND MAX WINDS
INITIAL 29/0300Z 17.2N 119.5W 60 KTS
12HR VT 29/1200Z 17.9N 121.0W 60 KTS
24HR VT 30/0000Z 18.9N 122.7W 55 KTS
36HR VT 30/1200Z 19.9N 124.4W 45 KTS
48HR VT 31/0000Z 21.0N 126.0W 35 KTS
72HR VT 01/0000Z 22.5N 129.5W 25 KTS
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