Belton, ON F0 Tornado of May 22, 2004

London - Middlesex

The weakest of four tornadoes that touched down during the May 22nd event, this F0 tornado damaged trees and tore off portions of a barn roof, leaving them tossed and twisted. The other tornadoes that occurred in Southern Ontario during this small tornado outbreak included a high-end F2 tornado at Gads Hill, an F1 at Winthrop, and another F2 that struck Mitchell.

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 intense thunderstorms across southern Ontario, which ultimately resulted in two F2 tornadoes, one F1 tornado and one F0 tornado.

Figure 1. Surface analysis at 21Z on May 22, 2004 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 near Belton, 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 Sat May 22 2004. Retrieved from:

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