T Storm & Heavy Rain ALERT from Brockville to Quebec Border SAT AUG 12, 2017

Cornwall Ontario – Thunderstorms and rains will be pummelling us from Brockville into the Quebec border Saturday.

The rain will come fast and hard with high winds.   The high for Saturday in Cornwall should hit 28c.

Rain is expected to continue into Sunday.


10:53 AM EDT Saturday 12 August 2017
Severe thunderstorm watch in effect for:

  • Cornwall – Lancaster
  • Maxville – Alexandria
  • Morrisburg – Long Sault
  • Winchester – Newington

Conditions are favourable for the development of severe thunderstorms that may be capable of producing strong wind gusts, large hail and heavy rain.

Conditions are expected to be favourable for severe thunderstorms this afternoon and evening as a cold front moves through.

Damaging winds and large hail are the main threats.

Torrential downpours may also suddenly reduce visibility resulting in hazardous driving conditions.

Strong wind gusts can toss loose objects, damage weak buildings, break branches off trees and overturn large vehicles. Intense lightning is likely with any thunderstorm that develops. Remember, severe thunderstorms can produce tornadoes. Heavy downpours can cause flash floods and water pooling on roads. Lightning kills and injures Canadians every year. Remember, when thunder roars, go indoors!

Severe thunderstorm watches are issued when atmospheric conditions are favourable for the development of thunderstorms that could produce one or more of the following: large hail, damaging winds, torrential rainfall.

The Office of the Fire Marshal and Emergency Management recommends that you take cover immediately if threatening weather approaches.


  1. Crack of lightening at 5am woke me right up!!!!

  2. Apparently we had a storm last night. I wouldn’t know I sleep through them.

  3. Power outage from 11:30 pm last evening here. Lasted a few hours.

  4. Author

    All over Cornwall Pete. For what we’re getting gouged by Cornwall Electric there are far too many outages this Summer.

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