Plenty of Chicagoans took advantage of an incredibly warm late December day on Saturday for the last weekend of the year, as temperatures reached into the 50s.But the unseasonably warm weather could throw a curveball for some people setting up a massive event at Wrigley Field on New Year's Eve.

As a chilly mist hovered over Wrigley Field on Friday afternoon, construction workers moved boxes across a large graphic of ivy where the third-base line normally would be. Four days before a Tuesday afternoon puck drop for the NHL Winter Classic,