Additional frost and freezes are expected to occur on Tuesday morning in the southern Atlantic States, extending as far south as Georgia.  Meanwhile, a disturbance currently crossing the western U.S. will reach the upper Great Lakes region by mid-week.  On Tuesday, accumulating snow may briefly affect the north-central U.S., while rain showers will develop across the mid-South and lower Midwest.  A trailing weather system will arrive in central and southern California on Tuesday, bringing an increased risk of flash flooding due to heavy rain and melting snow. 

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