Environment Canada has issued a weather advisory warning that conditions are favourable for the development of funnel clouds in Windsor-Essex.
The national weather service says this type of activity is generated by weak rotation under rapidly growing clouds or weak thunderstorms, but are normally not a danger near the ground.
It goes on to say that there is a chance the rotation could intensify and become a landspout tornado which doesn't usually cause significant damage but can be dangerous by toppling trees, throwing debris or damaging roofs.
A funnel cloud usually develops with little or no warning and the public is urged to take shelter if one appears.