A fresh snowstorm is expected to hit parts of the U.S. Northeast starting this weekend, possibly dumping as much as a foot of snow in the northernmost reaches of the region, forecasters said. A snowstorm blanketed the southeastern United States and churned northward, as residents from Maryland to Maine braced for freezing temperatures and heavy snowfalls. The heaviest snow in the region was forecast for Massachusetts, Rhode Island and northeastern Connecticut, with up to 15 inches (38 centimeters). Philadelphia was also under a snow emergency as of 6 pm (2300 GMT) and residents were advised to expect up to 14 inches (36 centimeters). Up to 18.5 inches (47 centimeters) of snow fell on parts of Tennessee since late Saturday, and up to 5.5 inches (14 centimeters) accumulated in Alabama, Georgia and North Carolina, according to the National Weather Service. The conditions led to a number of crashes overnight along the I-40, a major highway route in western Tennessee, and on I-75 in the eastern part of the state close to the Kentucky state line, according to the Tennessee Department of Transportation. Winter storm warnings stayed in effect across much of the south, while the northeastern states of New England were advised that the morning commute would likely by hampered by heavy snow. After canceling hundreds of flights in the southern United States on Sunday, Delta warned of more flight cuts in the northeast on Monday. More than one foot (30 centimeters) of snow was possible in some areas, the National Weather Service said, predicting the northern leg of the winter storm would unleash its furor beginning late Sunday and into early Monday. New York City officials deployed extra snowplows and salt trucks to fend off the snow piles, which were expected to hit a height of up to 14 inches (36 centimeters) by early Monday.