Cornwall Ontario – The intense heat of the the past two days may make for a light show in the skies tonight as Environment Canada has released a warning from Morrisburg to the Quebec border for the evening.

With a high expected over 30c today a storm should cool things down with temps between 16-20c for the next seven days with rain expected on Sunday in the area.

CFN will update as more information becomes available.


10:39 AM EDT Thursday 18 May 2017
Severe thunderstorm watch in effect for:

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

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

The thunderstorms are expected to develop ahead of or along a cold front this afternoon or evening.

Very strong wind gusts can damage buildings, down trees and blow large vehicles off the road. Remember, severe thunderstorms can produce tornadoes. 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.

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