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Marquette to Argyle, MB F2 Tornado of June 22, 1984

Portage la Prairie - Headingley - Brunkild - Carman


Figure 1 shows the surface observations at 7:00 am CDT, which shows a low pressure system in the Interlakes region of Manitoba with a cold front extending south across southern Manitoba and North Dakota. A warm front is also observed extending south from the low across southeastern Manitoba and Minnesota.

Figure 1. Surface weather map for June 22 1984 at 7:00 am CDT (NOAA, 2020).

The warm front likely triggered thunderstorms across the Interlakes region and southeastern Manitoba in the afternoon/evening hours of June 22nd, which ultimately led to four tornadoes on this day.

Figure 2. 500mb weather map for June 22, 1984 at 7:00 am CDT (NOAA, 2020).

According to Environment and Climate Change Canada (2018), an F2 tornado touched down at 6:25 pm CDT near Marquette, MB. The tornado travelled for 31.7 km, but its maximum width was not documented by ECCC. The tornado caused no injuries, fatalities or property damage.


Sources

NOAA Central Library. (2020). U.S. Daily Weather Maps. Friday June 22, 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/