The National Weather Service in Birmingham has some updates to the weather advisories for this weekend. Weather Alert #1A Cold Weather Advisory from Saturday, January 31, at Midnight until Noon. What to Expect“For the Cold Weather Advisory, very cold wind chills as low as 1 expected in the north to 10 to 15 in the southeast,” said the National Weather Service in Birmingham. Weather Alert #2An Extreme Cold Warning from Saturday, January 31, at Noon through Sunday, February 1, at Noon. What to Expect“For the Extreme Cold Warning, dangerously cold wind chills as low as 1 below expected by Saturday morning,” said the National Weather Service in Birmingham.