Prairie Siding, ON F1 Tornado of August 9, 2000

Windsor - Essex - Chatham-Kent

Figure 1 depicts the surface observations at 2:00 pm EDT, which shows a low pressure setting up on Michigan’s ‘thumb’ with a cold front extending south into Michigan. This front became the focus for intense thunderstorms in the afternoon hours of August 9th, which ultimately led to this F1 tornado.

Figure 1. Surface analysis at 18Z on August 9, 2000 showing mean sea-level pressure (MSLP) contours, surface observations, fronts and pressure centres (WPC, 2017)

According to Environment and Climate Change Canada (2018), an F1 tornado touched down at 5:20 pm EDT near Prairie Siding, ON. The path of the tornado was not documented by ECCC, but the tornado had a maximum width of 40 metres. The tornado caused no fatalities, injuries or property damage.


NWS Weather Prediction Center Surface Analysis Archive. (2017). Surface analysis 18Z Wed Aug 9 2000. Retrieved from:

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