Mildmay, ON F0 Tornado of July 8, 2007

Grey - Bruce

This tornado touched down near Mildmay at 7:00 pm and was visible alongside another F1 twister. It touched down near Bruce Road 3, with Canwarn spotters Dave Patrick and Ron Gravelle capturing photos and videos of the event; they reported that it was a multiple vortex. It did not produce any damage.

This was one of five tornadoes that touched down in Southern Ontario on July 8; the others were an F0 near Pinkerton, an F1 near Mildmay, another F0 near Mildmay, and an F0 near Listowel.

Figure 1 depicts the surface observations at 5:00 pm EDT, which shows a stationary front across southern Ontario. This front became the focus for convergence, which led to thunderstorm development across southern Ontario in the evening hours of July 8th.

Figure 1. Surface analysis at 21Z on July 8, 2007 showing mean sea-level pressure (MSLP) contours, surface observations, fronts and pressure centres (WPC, 2017)

According to Environment and Climate Change Canada (2018), an F0 tornado touched down at 7:00 pm near Mildmay, ON. The path and width of the tornado was not documented by ECCC. The tornado caused no fatalities, injuries or property damage.


NWS Weather Prediction Center Surface Analysis Archive. (2017). Surface analysis 21Z Sun Jul 8 2007. Retrieved from:

Environment and Climate Change Canada Data. (2018). Canadian National Tornado Database: Verified Events (1980-2009) – Public. Retrieved from: