A fog advisory is in effect for London, Ont., and Middlesex County on Thursday morning with officials warning of potential visibility issues.

Environment Canada issued the advisory, stating that the fog is expected to continue “through late morning.”

In addition to reduced visibility within dense fog, officials state that it’s possible areas of black ice could form due to the fog and freezing temperatures.

As of 8 a.m. Thursday, the national weather agency was reporting “freezing fog” in London and a temperature of -1 C. The high is expected to reach 2 C, with an overnight low of -8 C.

The forecast calls for the fog to dissipate throughout Thursday morning, followed by a cloudy afternoon.