Herronton, AB F0 Tornado of July 21, 1984

Brooks - Strathmore - Vulcan

Figure 1 depicts the surface observations at 7:00 am EST, which shows a stationary front across Alberta. This front triggered thunderstorms, which ultimately led to this tornado.

Figure 1. Surface analysis at 7:00 am on July 21, 1984 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 at 12:45 pm MDT near Herronton, AB. The path and width of the tornado was not documented by ECCC. The tornado resulted in one injury.


NOAA Central Library. (2019). U.S. Daily Weather Maps. Friday July 21, 1984 [PDF]. Retrieved from https://library.noaa.gov/Collections/Digital-Collections/US-Daily-Weather-Maps

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/