Malden Centre, ON F1 Tornado May 9, 2000

Windsor - Essex - Chatham-Kent

The roofs were torn off of two sheds and debris scattered, a boat and a ladder were thrown great distances and each found wrapped around the trunks of trees. The tornado touched down at 8:30 pm and had a path that was 1 kilometre long and 50 metres wide. Damage from this tornado, and another north of Amherstburg, was estimated by Environment Canada surveyors to be around $60,000.

This was one of two tornadoes that struck Southwestern Ontario, near Windsor on this day; the other, an F0 at Amherstburg, caused tree and property damage.

Figure 1 depicts the surface observations at 8:00 pm, which shows a low pressure system in eastern Ontario with a stationary front across southwestern Ontario. This boundary became the focus for intense thunderstorms in the afternoon/evening hours of May 9th and ultimately led to this F1 tornado.

Figure 1. Surface analysis at 00Z on May 10, 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 8:30 pm EDT near Malden Centre, ON. The tornado travelled for 1 km with a maximum width of 50 metres. The tornado caused no fatalities or injuries, but caused $30 thousand dollars in property damage.


NWS Weather Prediction Center Surface Analysis Archive. (2017). Surface analysis 00Z Wed May 10 2000. Retrieved from:

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