Hornepayne, ON F1 Tornado of July 22, 1987

Geraldton - Manitouwadge - Hornepayne

Little is known about this F1 tornado that occurred to the northeast of Thunder Bay at Foam Lake. It was one of the only recorded tornado in the province of Ontario in 1987, making it one of the quietest years on record.

Figure 1 depicts a stationary front situated right over Hornepayne at 8:00 pm EDT (roughly 25mins after the tornado). A cumulonimbus was noted at this time on surface maps (Figure 1). This frontal boundary was responsible for initiating the storm that formed the F1 tornado in Hornepayne.

Figure 1. Surface analysis at 00Z on July 22, 1987 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 7:35 pm EDT in Hornepayne, ON and travelled for 400 metres. The tornado caused no injuries, fatalities or property damage.


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/

NWS Weather Prediction Center Surface Analysis Archive. (2017). Surface analysis 00Z Thu Jul 23 1987. Retrieved from: https://www.wpc.ncep.noaa.gov/archives/web_pages/sfc/sfc_archive.php