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| #894642 (Received by flhurricane at: 10:39 PM 06.Jul.2017) TCDAT4 Tropical Depression Four Discussion Number 5 NWS National Hurricane Center Miami FL AL042017 1100 PM AST Thu Jul 06 2017 The depression continues to be poorly organized this evening. Recent scatterometer data indicate that the circulation is losing definition, with the center in that data well to the southeast of the remaining convection. A complication, though, is recent observations from NOAA buoy 41041 that suggest the possibility of a second center closer to the remaining convection and well to the north of the center seen in the scatterometer data. The initial intensity remains 25 kt based mainly on the scatterometer data. It is possible that the system has already degenerated to an open wave, but for now advisories will be maintained until visible imagery becomes available Friday morning. The depression should continue to lose organization due to entrainment of dry air and developing southwesterly shear. The new intensity forecast now calls for the system to degenerate to a remnant low between 12 and 24 h and become a open wave after 72 h. Both of these events could occur earlier than current forecast. It should be noted that the UKMET model suggests the possibility the system could regenerate near the end of the forecast period. However, the other large-scale models do not yet support this scenario. A strong low- to mid-level ridge to the north of the cyclone should steer it westward to west-northwestward until dissipation. The new forecast track lies near the model consensus and is a little to the south of the previous track. FORECAST POSITIONS AND MAX WINDS INIT 07/0300Z 13.4N 46.7W 25 KT 30 MPH 12H 07/1200Z 14.1N 49.6W 25 KT 30 MPH 24H 08/0000Z 15.2N 53.1W 25 KT 30 MPH...POST-TROP/REMNT LOW 36H 08/1200Z 16.6N 56.7W 25 KT 30 MPH...POST-TROP/REMNT LOW 48H 09/0000Z 18.3N 60.2W 20 KT 25 MPH...POST-TROP/REMNT LOW 72H 10/0000Z 21.0N 66.0W 20 KT 25 MPH...POST-TROP/REMNT LOW 96H 11/0000Z...DISSIPATED $$ Forecaster Beven |
