Beachburg, ON F1 Tornado of June 22, 2004

Renfrew - Pembroke - Barry's Bay

A mobile home was moved 10 metres and damaged extensively, while two old barns were also destroyed, their debris carried away and scattered. We estimate the damage to be around $100 thousand dollars.

Figure 1 depicts the surface observations at 5:00 pm EDT, which shows a low pressure system on the Ontario/Quebec border with a warm front extending into southern Quebec and a cold front extending into eastern Ontario. The strong convergence near the low pressure helped thunderstorm development in the Ottawa valley, which ultimately led to this F1 tornado.

Figure 1. Surface analysis at 21Z on June 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 F1 tornado touched down at 6:30 pm in Beachburg, ON. The path and width of the tornado was not documented by ECCC. The tornado caused no fatalities or injuries and the property damage was not documented by ECCC.


NWS Weather Prediction Center Surface Analysis Archive. (2017). Surface analysis 21Z Tue Jun 22 2004. Retrieved from:

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