Satellite images and tracking maps of Tropical Storm Arthur 2020, May 15 - 19. Max wind speed 60mph.
Arthur has transitioned into an extratropical low this morning (May 19) 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 knots 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.
Information provided by NHC.