sentences:  It continued to strengthen, and by September 18, Debby briefly peaked as a Category 4 hurricane on the Saffir–Simpson Hurricane Scale, with winds at 130 mph (215 km/h) and a minimum pressure of 950 mbar (hPa; 28.05 inHg).After reaching peak intensity, Debby slowly weakened, and was between Category 2 and 1 when it passed south of Newfoundland early on September 19.Thereafter, the storm accelerated and was moving at roughly 60 mph (95 km/h) towards the east.