This tornado was only 80m wide and had a path of just 300m. Nevertheless, dozens of trees were snapped and uprooted as it came ashore off of Georgian Bay. This was one of four tornadoes that touched down in Cottage Country as a violent derecho swept across Central Ontario. The others:
The Forecast
Figure 2 depicts the surface observations on the early morning hours of July 15, 1995. According to the Storm Prediction Center (2018), a bow echo was ongoing since July 14th across the Great Lakes region (Figure 1). At the time of Figure 2, storms were located along the cold front in southern Ontario, extending from the low pressure system. This derecho can be seen via the radar loop shown below. Radar imagery loop from Environment Canada’s King City, Ontario radar (Storm Prediction Center, 2018).
“As the bow echo system producing the derecho crossed northern Lake Huron (LH) and Georgian Bay (GB), it grew in scale and severe winds affected a large part of southern Ontario (ON) during the pre-dawn hours of Saturday, July 15th (Figure ##). Some damage occurred in the Toronto metropolitan area near the southern edge of the derecho, and a wind gust to 136 kph (85 mph) was measured at the Buttonville Airport just north of the city. However, the most severe damage, which likely was associated with wind gusts up to 160 kph (100 mph) or more, occurred along a band from the “Cottage Country” east of Georgian Bay to the northeastern corner of Lake Ontario (LO) and adjacent parts of the St. Lawrence River Valley. This swath of damage was associated with the most rapidly moving part of the bowed line, as depicted in the above radar imagery loop from Environment Canada’s King City, Ontario radar. While most of the damage was associated with intense straight-winds, several brief tornadoes occurred in the bowed line. Most were weak, but a strong F2 intensity tornado hit the town of Bridgenorth, destroying a marina and damaging 20 homes” (Storm Prediction Center, 2018).
Recap
According to Environment and Climate Change Canada (2018), an F0 tornado touched down near Clearwater Beach and travelled for 300 metres with a maximum width of 80 metres. The tornado caused no fatalities, injuries or property damage.
Sources
Storm Prediction Center. (2018). July 12-13, 1995 Derecho “The Right Turn Derecho”. Retrieved from: https://www.spc.noaa.gov/misc/AbtDerechos/casepages/jul1995derechopage.htm
NWS Weather Prediction Center. (2017). Surface analysis 06Z Sat Jul 15 1995. 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/
