Environment Canada has dropped its snow squall watch for London, Ont., but the national weather agency has issued a winter weather travel advisory.
Environment Canada says snow squalls over Lake Huron have weakened, however bursts of snow will impact travel late Thursday afternoon and into the evening.
Heavy snowfall and blowing snow could also result in suddenly reduced visibilities at times and roadways close to the shores of Lake Huron will be affected, according to Environment Canada.
Officials are reminding motorists to be prepared to adjust their driving with changing road conditions.
A snow squall warning was also downgraded to a watch in Huron County and replaced with a winter weather travel advisory for portions of Grey-Bruce County and eastern Lambton County.
The workweek began in London with a snowfall warning on Monday, followed by a snow squall watch and a winter weather travel advisory on Tuesday and then a special weather statement and snow squall watch on Wednesday.