Grassy Lake, AB F0 Tornado of June 2, 1980

Lethbridge - Taber - Milk River

Figure 1 depicts the surface observations at 7:00 am EST, which shows a low pressure system on the Saskatchewan/Alberta border with a cold front extending south. The interaction with the Rocky Mountains, the low pressure and the front ultimately resulted in thunderstorms across Southern Alberta and this tornado.

Figure 1. Surface analysis at 7:00 am on June 2, 1980 showing mean sea-level pressure (MSLP) contours, surface observations, fronts and pressure centres (NOAA, 2020)

According to Environment and Climate Change Canada (2018), an F0 tornado touched down near Grassy Lake, AB. The path, time and width of the tornado was not documented by ECCC. No property damage was documented for this tornado.


NOAA Central Library. (2019). U.S. Daily Weather Maps. Monday June 2, 1980 [PDF]. Retrieved from

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