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  • Writer's pictureAdvance Weather

Severe Thunderstorm Watch Issued

Issued: 2:26 PM EDT Wednesday 07 July 2021

Environment Canada has issued a Severe Thunderstorm Watch for:

  • Chatham-Kent - Rondeau Park

  • London - Parkhill - Eastern Middlesex County

  • Rodney - Shedden - Western Elgin County

  • Sarnia - Petrolia - Western Lambton County

  • St. Thomas - Aylmer - Eastern Elgin County

  • Strathroy - Komoka - Western Middlesex County

  • Watford - Pinery Park - Eastern Lambton County

  • Windsor - Leamington - Essex County


Conditions are favourable for the development of severe thunderstorms that may be capable of producing strong wind gusts, large hail and heavy rain. Hazard: Wind gusts up to 100 km/h, locally heavy rain, and isolated hail up to nickel size possible. A tornado cannot be ruled out. Locations: Portions of southwestern Ontario. Timing: This afternoon through to this evening. Discussion: A few thunderstorms will develop early this afternoon before becoming more widespread by this evening. The predominant threat associated with these storms will be locally damaging winds and torrential downpours. Rainfall amounts may approach or exceed 50 mm locally by this evening.

Large hail can damage property and cause injury. Strong wind gusts can toss loose objects, damage weak buildings, break branches off trees and overturn large vehicles. Heavy downpours can cause flash floods and water pooling on roads. Lightning kills and injures Canadians every year. Remember, when thunder roars, go indoors! The Office of the Fire Marshal and Emergency Management recommends that you take cover immediately if threatening weather approaches.


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