Rocky Rapids, AB F1 Tornado of June 29, 1984

Drayton Valley - Devon - Rimbey - Pigeon Lake

Figure 1 depicts the surface observations at 7:00 am EST, which shows a low pressure system across Southern Alberta with a stationary front extending across Northern Saskatchewan and a cold front extending south across Western Montana. The interaction between the occluding front and the Rocky Mountains triggered thunderstorms across Central Alberta, which ultimately led to two tornadoes on this day.

There were 10 other tornadoes on this day:

  • Lake Wabamun, AB F1 Tornado
  • Stony Plain, AB F1 Tornado
  • Busby, AB F1 Tornado
  • Dapp, AB F2 Tornado
  • Lesser Slave Lake, AB F0 Tornado
  • Abee, AB F1 Tornado
  • Big Coulee, AB F3 Tornado
  • Baptiste Lake, AB F0 Tornado
  • Foremost, AB F1 Tornado
  • Minburn – Myrnam, AB F1 Tornado
Figure 1. Surface analysis at 7:00 am on June 29, 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 F1 tornado touched down at 3:30 pm MDT near Rocky Rapids, AB. The path and width of the tornado was not documented by ECCC. No property damage was documented for this tornado.


NOAA Central Library. (2019). U.S. Daily Weather Maps. Friday June 29, 1984 [PDF]. Retrieved from

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