Brownfield, AB F1 Tornado of July 11, 1985

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Figure 1 depicts the surface observations at 7:00 am EST, which shows a stationary front across Alberta. This front was the focus for thunderstorm activity, which ultimately led to this tornado.

Figure 1. Surface analysis at 7:00 am on July 11, 1985 showing mean sea-level pressure (MSLP) contours, surface observations, fronts and pressure centres (NOAA, 2020)

According to Environment and Climate Change Canada (2018), an F1 tornado touched down at 8:30 pm MDT near Brownfield, AB. The path and width of the tornado was not documented by ECCC. The tornado caused $10 thousand dollars in property damage.


NOAA Central Library. (2019). U.S. Daily Weather Maps. Thursday July 11, 1985 [PDF]. Retrieved from

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