This as I'm about to head out for that 5K.
"THIS FRONT WILL BE FOLLOWED BY VERY STRONG AND GUSTY WEST TO SOUTHWEST WINDS. THE COLD FRONT WENT THROUGH WINDSOR AT 5 AM AND THE AIRPORT REPORTED SUSTAINED WINDS OF 61 KM/H AND A WIND GUST TO 104 KM/H. SIMILAR CONDITIONS ARE EXPECTED FOR ALL OF SOUTHERN ONTARIO AS THE COLD FRONT MAKES ITS WAY EAST"
Um, kay, some clothing changes will be needed.