Connaught, ON to Shawville, QC F2 Tornado of July 4, 2006

Renfrew - Pembroke - Barry's Bay

Touching down in the early afternoon, at around 1:20 pm, this long-track but narrow tornado was on the ground for over 50 kilometres. Leaving a path of damage that was 60 metres wide, the tornado struck several farms; barns were destroyed, silos knocked over and trees snapped. The tornado passed near Cobden and travelled all the way to near Shawville, Quebec.

Figure 1 depicts the surface observations at 11:00 am EDT, which shows a cold front slicing through Ontario. This front became the focus of intense thunderstorms, which ultimately led to this long-track F2 tornado.

Figure 1. Surface analysis at 15Z on July 4, 2006 showing mean sea-level pressure (MSLP) contours, surface observations, fronts and pressure centres (WPC, 2017)

According to Environment and Climate Change Canada (2018), an F2 tornado touched down at 1:20 pm near Connaught, ON. The tornado travelled for 48 km with a maximum width of 60 metres. The tornado caused no fatalities, injuries or property damage.


NWS Weather Prediction Center Surface Analysis Archive. (2017). Surface analysis 15Z Tue Jul 4 2006. Retrieved from:

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