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Winter storm hitting much of the central South U.S. has caused Gov. Robert Bentley of Alabama to declare a state of emergency Thursday. (National Weather Service)

The threat of severe winter weather and freezing precipitation Thursday has prompted Alabama Gov. Robert Bentley to declare a state of emergency and activate the Alabama National Guard.

Ice, sleet, snow, and freezing rain are all on the menu for north and north central Alabama, according to the National Weather Service. Forecasts of highs just above or below freezing means that precipitation could cause transportation issues throughout the affected area, and make driving difficult and unsafe.

The National Weather Service has said widespread travel issues are expected Thursday over the northwest part of the state.

Heavy accumulations are expected in North Alabama. Many school systems in North Alabama and in Central Alabama are closing in anticipation.

"I have declared a State of Emergency as Alabama expects winter weather to impact our state," Bentley said in a statement Wednesday. "I have directed all state agencies to take necessary actions to be prepared to respond to potential requests for assistance. I encourage Alabamians to be prepared and monitor the weather conditions."

The state of emergency goes into effect at midnight. Bentley activated 250 Alabama National Guardsmen to assist with any issues, and the Alabama EMA has activated its Storm Emergency Operations Center and relevant Field Divisions, according to the governor's office.

Bentley's wife, First Lady Dianne Bentley, canceled a planned visit to Sumiton Elementary Thursday due to the forecast.