Another blast of freezing air is forecast for the central and eastern U.S. this week as two storms threaten to bring disruptive snow to the Northeast. “After a mild and pleasant weekend for many, winter will make a harsh return to much of the central and eastern U.S.,” the National Weather Service said in a bulletin on its website at 10:41 a.m. U.S. East Coast time yesterday. “Frigid air will first impact the northern Plains on Monday before diving south and east throughout the week. By Wednesday, most of the Great Lakes will have single digit high temperatures and parts of the Tennessee Valley will struggle to rise above freezing.” Milder weather across the Northeast over the weekend pushed temperatures into the 60s Fahrenheit (16 degrees Celsius) in Washington and Philadelphia and the 50s in New York City and Boston , AccuWeather Inc. said on its website . Highs […]