FLOOD WARNING: Saint Lawrence River – Update #5

21-Jun-2019 21-Jun-2019

Weather Forecast:

Rainfall of 20 to 40 mm and strong winds are possible Monday, June 24, 2019 through Wednesday, June 26, 2019.

Environmental Conditions:
Lake Ontario’s water levels have slightly declined this past week. Although, with record inflows from Lake Erie expected to continue, water levels will remain near seasonal highs for the next several weeks.

Flooding and other high-water impacts continue to be reported around the upper Saint Lawrence River during periods of active weather.


The latest forecast from the International Lake Ontario – St. Lawrence River Board suggests that Lake Ontario’s water levels are expected to resume declining slowly over the following weeks and through summer. The rate of decline will depend on rainfall. 

Lake Ontario’s increased outflows may increase Saint Lawrence River levels upstream of Iroquois throughout Edwardsburg/Cardinal and Augusta Township.

Residents are advised that wind may cause large waves, further aggravating water levels which may affect structures close to shore.


Residents in flood-prone areas are encouraged to closely monitor conditions and take necessary actions.

Residents are advised to stay away from watercourses where flows are high and where banks might be unstable. Parents are encouraged to explain dangers to children.

Residents in flood prone or low-lying areas historically susceptible to flooding are encouraged to closely follow evolving conditions and take necessary precautions to protect their property.

This Flood Warning statement is in effect until Friday, July 5, 2019 at 5:00 PM.

SNC monitors the water levels and weather forecasts as part of the Flood Forecasting and Warning Program. Updates are provided as conditions change.

The International Lake Ontario – St. Lawrence River Board continues to monitor conditions on an ongoing basis. Information on hydrologic conditions, water levels and outflows, including graphics and photos, are available on the Board’s website at

Please visit for more information. To provide feedback with respect to changes in water related conditions please email, post on our Facebook (/SouthNationConservation) or Twitter (@SouthNationCA).

FOR MORE INFORMATION: Omar Kana’n, Water Resources Specialist – Engineering, 613-551-9057,    

FOR MEDIA INQUIRIES: Taylor Campbell, Communications Specialist, 613-984-2948, ext. 296,

Forwarded to: All Flood Forecasting and Warning Directory