Aldersyde, AB F1 Tornado of June 5, 1988

Okotoks - High River - Claresholm

Figure 1 depicts the surface observations at 3:00 am MDT, which shows a low pressure system on the Alberta/Saskatchewan border.

Eight tornadoes occurred on this day, the other tornadoes were:

Figure 1. Surface analysis at 09Z on June 5, 1988 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 2:00 am MDT near Aldersyde, AB. The path and width of the tornado was not documented by ECCC.


NWS Weather Prediction Center Surface Analysis Archive. (2017). Surface analysis 09Z Sun Jun 5 1988. Retrieved from:

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