Harrow, ON EF0 Tornado of August 19, 2014

Windsor - Essex - Chatham-Kent

This brief tornado struck a farm property near Harrow at around 6:30 pm, causing EF0 damage. Trees were snapped, part of the cap was removed from a silo, and a barn had a portion of it’s roof torn off with the debris scattered through the yard.

This was one of two tornadoes to touch down on August 19, 2014. The other:

  • Windsor (EF0)
Figure 1. Surface analysis at 00Z on August 20, 2014 showing mean sea-level pressure (MSLP) contours, surface observations, fronts and pressure centres (WPC, 2017)

Figure 1 depicts the surface observations at 8:00 pm EDT, which shows a warm front axtending across Michigan and an outflow boundary over Erie, PA. The warm front became the focus for intense thunderstorms in the evening hours of August 19th, which ultimately led to two tornadoes across southwestern Ontario.


NWS Weather Prediction Center Surface Analysis Archive. (2017). Surface analysis 00Z Wed Aug 20 2014. Retrieved from: https://www.wpc.ncep.noaa.gov/archives/web_pages/sfc/sfc_archive.php