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| #1001705 (Received by flhurricane at: 10:51 AM 19.May.2020) TCDAT1 Post-Tropical Cyclone Arthur Discussion Number 12 NWS National Hurricane Center Miami FL AL012020 1100 AM AST Tue May 19 2020 Arthur has transitioned into an extratropical low this morning with a warm front extending northeastward from the circulation, any deep convection only along the front, and lots of more stable cumulus clouds near the center. Thus this is the last advisory. The initial intensity remains 50 kt based on continuity and model analyses. The main adjustments to the previous forecast include a quicker dissipation of the post-tropical cyclone, somewhat linked to the models showing a faster weakening after 12 hours, and a continuation of the westward shift in the track forecast in a day or two. These changes are consistent with the latest model consensus for track and similar to a GFS/ECMWF blend for intensity. Dangerous coastal surf conditions and rip currents are expected to continue along portions of the mid-Atlantic and southeast U.S. coasts during the next couple of days. See products from your local National Weather Service Forecast Office for more details. FORECAST POSITIONS AND MAX WINDS INIT 19/1500Z 36.8N 68.6W 50 KT 60 MPH...POST-TROPICAL 12H 20/0000Z 36.4N 66.9W 50 KT 60 MPH...POST-TROP/EXTRATROP 24H 20/1200Z 35.2N 65.6W 45 KT 50 MPH...POST-TROP/EXTRATROP 36H 21/0000Z 33.6N 65.0W 40 KT 45 MPH...POST-TROP/EXTRATROP 48H 21/1200Z 32.0N 64.5W 30 KT 35 MPH...POST-TROP/EXTRATROP 60H 22/0000Z...DISSIPATED $$ Forecaster Blake |
