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Tracking a Caribbean Wave and keeping an eye on the potential for new Caribbean Gyre/Trough development next week
Days since last H. Landfall - US: Any 16 (Nate) , Major: 33 (Maria) Florida - Any: 43 (Irma) Major: 43 (Irma)
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#9600 (Received by flhurricane at: 7:34 PM 22.Sep.2004)
TCDAT4
TROPICAL DEPRESSION IVAN SPECIAL DISCUSSION NUMBER 67
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
7 PM EDT WED SEP 22 2004

AFTER CONSIDERABLE AND SOMETIMES ANIMATED IN-HOUSE DISCUSSION OF THE
DEMISE OF IVAN...IN THE MIDST OF A LOW-PRESSURE AND SURFACE FRONTAL
SYSTEM OVER THE EASTERN UNITED STATES...THE NATIONAL HURRICANE
CENTER HAS DECIDED TO CALL THE TROPICAL CYCLONE NOW OVER THE GULF
OF MEXICO TROPICAL DEPRESSION IVAN. WHILE DEBATE WILL SURELY
CONTINUE HERE AND ELSEWHERE...THIS DECISION WAS BASED PRIMARILY ON
THE REASONABLE CONTINUITY OBSERVED IN THE ANALYSIS OF THE SURFACE
AND LOW-LEVEL CIRCULATION.

ONCE THE LOW PRESSURE AREA REACHED THE GULF OF MEXICO IT BEGAN TO
GRADUALLY DEVELOP CONVECTION AND A SURFACE CIRCULATION. SATELLITE
IMAGES...RECON DATA AND BUOYS IN THE GULF OF MEXICO INDICATE THAT
THE SYSTEM IS ORGANIZED ENOUGH TO BE CLASSIFIED AS A TROPICAL
DEPRESSION. THE CURRENT SOUTHERLY SHEAR OVER THE DEPRESSION IS
FORECAST TO RELAX A LITTLE...ENOUGH TO ALLOW THE SYSTEM TO REGAIN
TROPICAL STORM STATUS BEFORE LANDFALL.

THE BEST ESTIMATE OF THE INITIAL MOTION IS 295/12 KNOTS. THIS
GENERAL MOTION IS EXPECTED TO CONTINUE AROUND THE SUBTROPICAL HIGH
CENTERED OVER THE UNITED STATES. THE INTENSITY AND TRACK FORECASTS
AS WELL AS THE WIND RADII REQUIRE THE ISSUANCE OF A TROPICAL STORM
WARNING FROM THE MOUTH OF THE MISSISSIPPI RIVER TO SARGENT TEXAS.

FORECASTER AVILA

FORECAST POSITIONS AND MAX WINDS

INITIAL 22/2300Z 26.9N 89.3W 30 KT
12HR VT 23/0600Z 27.5N 91.2W 40 KT
24HR VT 23/1800Z 28.5N 93.0W 45 KT
36HR VT 24/0600Z 30.0N 95.0W 30 KT...INLAND
48HR VT 24/1800Z 30.5N 95.5W 25 KT...REMNANT LOW
72HR VT 25/1800Z 31.0N 96.0W 20 KT...REMNANT LOW