Avonmore, ON F0 Tornado of June 12, 1994

Cornwall - Morrisburg

Along its 3km track, this probable tornado snapped and uprooted trees and knocked down power poles. It touched down at 6:15 pm. This was one of two tornadoes that touched down in the province on June 12; the other was an F0 near Thamesford in Southern Ontario.

Figure 1 depicts the surface observations at 5:00 pm EDT, which depicts a trough of low pressure extending into eastern Ontario. This trough was the focus for storms and ultimately this F0 tornado.

Figure 1. Surface analysis at 21Z on June 12, 1994 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 6:15 pm EDT near Avonmore, ON and tracked for 800 metres. The tornado caused no fatalities, injuries or property damage.


NWS Weather Prediction Center Surface Analysis Archive. (2017). Surface analysis 21Z Sat Jun 12 1994. Retrieved from: https://www.wpc.ncep.noaa.gov/archives/web_pages/sfc/sfc_archive.php

Environment and Climate Change Canada Data. (2018). Canadian National Tornado Database: Verified Events (1980-2009) – Public. Retrieved from: http://donnees.ec.gc.ca/data/weather/products/canadian-national-tornado-database-verified-events-1980-2009-public/