ZCZC HFOTCDCP4 ALL TTAA00 PHFO DDHHMM TROPICAL STORM JIMENA DISCUSSION NUMBER 53 NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI EP132015 ISSUED BY NWS NATIONAL HURRICANE CENTER MIAMI FL 1100 AM HST TUE SEP 08 2015 JIMENA IS A SHEARED CYCLONE AND CONSISTS OF A LARGE CIRCULATION OF LOW CLOUDS WITH SOME PATCHES OF DEEP CONVECTION TO THE EAST OF THE CENTER. GIVEN THE LACK OF DEEP THUNDERSTORM ACTIVITY NEAR THE CENTER...THE SATELLITE INTENSITY ESTIMATES HAVE CONTINUED TO DECREASE...AND THE INITIAL INTENSITY HAS BEEN LOWERED TO 40 KT. THE GLOBAL MODELS SEPARATE THE LOW-LEVEL FROM THE MID-LEVEL CENTER AS QUICKLY AS 48 HOURS, AND SHIPS GUIDANCE INDICATE THAT STRONG SHEAR WILL CONTINUE TO IMPINGE ON THE CYCLONE. ON THIS BASIS...THE OFFICIAL FORECAST CALLS FOR JIMENA TO BECOME A REMNANT LOW IN 48 HOURS OR SO. THE LOW COULD REMAIN LINGERING FOR A FEW MORE DAYS. THE BEST ESTIMATE OF THE INITIAL MOTION IS TOWARD THE WEST OR 270 DEGREES AT 6 KT. SINCE JIMENA IS BECOMING A SHALLOW CYCLONE...IT WILL LIKELY BE STEERED SLOWLY TOWARD THE WEST OR EVEN WEST-SOUTHWEST BY THE LOW-LEVEL TRADE WINDS FOR THE NEXT 2 TO 3 DAYS. AFTER THAT TIME...THE REMNANT LOW WILL LIKELY TURN MORE TO THE NORTHWEST AWAY FROM THE HAWAIIAN ISLANDS AS A NEW TROUGH APPROACHES FROM THE WEST. THE OFFICIAL FORECAST IS VERY CLOSE TO THE MULTI-MODEL CONSENSUS AND IS NOT TOO DIFFERENT FROM THE PREVIOUS ONE. FORECAST POSITIONS AND MAX WINDS INIT 08/2100Z 26.5N 153.4W 40 KT 45 MPH 12H 09/0600Z 26.3N 154.7W 35 KT 40 MPH 24H 09/1800Z 25.9N 156.4W 30 KT 35 MPH 36H 10/0600Z 25.6N 158.1W 25 KT 30 MPH 48H 10/1800Z 25.4N 159.6W 25 KT 30 MPH...POST-TROP/REMNT LOW 72H 11/1800Z 25.5N 161.8W 25 KT 30 MPH...POST-TROP/REMNT LOW 96H 12/1800Z 26.4N 163.0W 25 KT 30 MPH...POST-TROP/REMNT LOW 120H 13/1800Z 31.2N 166.0W 20 KT 25 MPH...POST-TROP/REMNT LOW $$ FORECASTER AVILA NNNN
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