Tropical Storm CALVIN
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TROPICAL STORM CALVIN DISCUSSION NUMBER 9
NWS NATIONAL HURRICANE CENTER MIAMI FL EP032011
800 AM PDT SAT JUL 09 2011
THE CLOUD PATTERN HAS CONTINUED TO DETERIORATE AND NOW CONSISTS
OF A SHAPELESS AREA OF WEAKENING CONVECTION. GIVEN THE CURRENT
SATELLITE PRESENTATION...THE INITIAL INTENSITY HAS BEEN LOWERED TO
50 KNOTS...ALTHOUGH DUE TO DVORAK CONSTRAINTS...THE T-NUMBERS
SUGGEST A STRONGER CYCLONE. CALVIN IS ALREADY OVER COOL WATERS...SO
THE CYCLONE WILL ONLY CONTINUE TO WEAKEN.
CALVIN IS MOVING TOWARD THE WEST-NORTHWEST OR 285 DEGREES AT 10
KNOTS AROUND THE PERIPHERY OF THE SUBTROPICAL RIDGE. IN A DAY OR
SO...THE CYCLONE IS EXPECTED TO BE A SHALLOW SYSTEM AND BE STEERED
BY THE WEAKENING LOW-LEVEL FLOW...AS INDICATED BY MOST OF THE
GLOBAL MODELS. THEREFORE...CALVIN OR ITS REMNANTS WILL PROBABLY
DRIFT WESTWARD OR MEANDER UNTIL DISSIPATION.
FORECAST POSITIONS AND MAX WINDS
INIT 09/1500Z 17.1N 111.3W 50 KT 60 MPH
12H 10/0000Z 17.5N 112.3W 45 KT 50 MPH
24H 10/1200Z 18.0N 114.0W 35 KT 40 MPH
36H 11/0000Z 18.5N 115.5W 25 KT 30 MPH...POST-TROP/REMNT LOW
48H 11/1200Z 19.0N 117.0W 20 KT 25 MPH...POST-TROP/REMNT LOW
72H 12/1200Z...DISSIPATED
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FORECASTER AVILA
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