Tropical Storm Don was the fourth named storm of the 2017 hurricane season, forming with a max sustained wind of 40 mph on the evening of July 17 2017, after a reconnaissance aircraft flew in and found the winds to be sustained at 40 mph and a central pressure of 1009. The storm strengthened 12 hours later to its peak before falling apart 18 hours after that.
None known.
End Result: Though the GFS found Don first with the CMC trailing behind it, it failed in overblowing intensity, while the ECMWF suppressed the storm too much. The HMON, HWRF and its new PARA did as well. However, the GFS-PARA kept intensity low enough, but high enough to take the win.