Penhold, AB F0 Tornado of July 30, 1987

Figure 1 depicts the surface observations at 12:00 pm MDT, which shows a stationary front across Northern Alberta. This front became the focus for thunderstorms across Central Alberta, which ultimately led to five tornadoes on this day.

The other tornadoes were:

St. Albert, AB F1 Tornado
Dapp, AB F0 Tornado
Nisku, AB F1 Tornado
Bon Accord, AB F0 Tornado

**Figure 1.** Surface analysis at 18Z on July 30, 1987 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 8:15 pm MDT near Penhold, AB. The path and width of the tornado was not documented by ECCC.

Sources

NWS Weather Prediction Center Surface Analysis Archive. (2017). Surface analysis 18Z Thu Jul 30 1987. Retrieved from: https://www.wpc.ncep.noaa.gov/archives/web_pages/sfc/sfc_archive.php

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/

Sources

Through the Eyes of Our Chasers