A powerful storm that ripped through the west Quebec community of Quyon on Canada Day was a microburst and not a tornado, according to a preliminary investigation.

An Environment Canada investigator surveying the damage in the community on Wednesday said it was "definitely" a microburst that swept through the municipality of Pontiac.

A microburst is a column of sinking air that can come down at speeds over 100 kilometres per hour. The damage it leaves behind is recognizable because it often appears to come from one direction.

Winds reach speeds of 180 km/h

quyon quebec storm july 1 2014

A look at damage from the Canada Day storm in Quyon, Que., about 50 kilometres northwest of Ottawa. (Radio-Canada)

Environment Canada's Serge Besner said the microburst winds reached speeds of 170 to 180 km/h.

The area was one of several in eastern Ontario and west Quebec that had been under a tornado warning Tuesday.

Regional police MRC des Collines said there were no significant injuries, but the storm damaged homes, barns and camping trailers and knocked down many trees.

Pontiac Mayor Roger Larose said the damage was extensive.

"One of the barns is gone completely. The guy's roof is half gone. I see a roof here gone. One of the guys has a neighbour's roof in his yard. Lots of damage on cottages," said Larose.