Environment Canada issued a weather advisory for heavy snow around 7 a.m.

It was a busy Friday morning for Waterloo Regional Police.

Between midnight and 11:40 a.m., a total of 51 collisions were reported.

570 NEWS Weather Specialist John Wilson said Mother Nature loves to throw curveballs.

"It wasn't supposed to be this heavy, but we've got snow and plenty of it - at least 7 centimetres."

In a post on Twitter, Meterologist Rob Kuhn with Environment Canada said he measured about 13 cm of new snow in Kitchener between 5 a.m. and 9 a.m.