Thornton, ON F0 Tornado of August 14, 1995

Dufferin - Innisfil

No damage was caused by this rope tornado which was captured in photographs and on video by local residents.

Figure 1 shows the surface observations at 5:00 pm (time of the tornado), which shows a strong low pressure over northern Manitoba with a warm front extending across southern Ontario. This warm front triggered thunderstorms as it lifted north towards Barrie.

Figure 1. Surface analysis at 21Z on August 14, 1995 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 5:00 pm EDT near Thornton, ON. The track 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 Mon Aug 14 1995. Retrieved from:

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