Delia, AB F0 Tornado of July 6, 1990

Drumheller - Three Hills

Figure 1 depicts the surface observations at 12:00 pm MDT, which shows a low pressure system across Southeastern Alberta with a trough of low pressure across Southern Alberta extending westward.

There were three tornadoes on this day, the others being:

Figure 1. Surface analysis at 18Z on July 6, 1990 showing mean sea-level pressure (MSLP) contours, surface observations, fronts and pressure centres (WPC, 2017)

According to Environment and Climate Change Canada (2018), an F0 tornado touched down at 4:00 pm MDT near Delia, AB. The path and width of the tornado was not documented by ECCC.


NWS Weather Prediction Center Surface Analysis Archive. (2017). Surface analysis 18Z Fri Jul 6 1990. Retrieved from:

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