Water Safety Statement for Lake Ontario & Upper St. Lawrence River Storm Surge

Cataraqui Conservation has issued a Shoreline Conditions Statement today due to forecasted storm surge and waves from sustained west winds.

Weather Situation:

The Surface Water Monitoring Centre (SWMC) of the Ministry of Northern Development, Mines, Natural Resources & Forestry (NDMNRF) is forecasting increased water levels due to storm surge from sustained west winds. Environment Canada is also forecasting significant wave heights.


The forecasted storm surge values and wave heights for eastern Lake Ontario and upper St. Lawrence River on the evening of April 19 and into April 20 might be high enough to cause localized shoreline erosion and inundation of low-lying areas.

Cataraqui Conservation is urging residents to take care along the shoreline.

For further information on water levels, wind and wave forecasts, and Provincial flood messages visit https://cataraquiconservation.ca/pages/flood.

For information directly from the International Lake Ontario – St. Lawrence River Board (ILOSLRB) visit:

Cataraqui Conservation staff will continue to monitor ILOSLRB water level forecasts, Surface Water Monitoring Centre Provincial Statements, local water levels, and update Cataraqui Conservation messaging as needed. This Shoreline Conditions Statement will remain in effect until (or updated before) 11:59 PM April 20, 2022.

See below for watershed conditions terminology:

Normal: No flood conditions exist

Shoreline Conditions Statement – Water Safety: Higher than average water levels, unsafe banks, or other factors that could be dangerous for recreational users and shoreline residents. Widespread flooding is not expected.

Shoreline Conditions Statement – Flood Outlook: Early notice of the potential for flooding based on weather and lake conditions.

Flood Watch: Flooding is possible in specific watercourse or municipalities. Municipalities, emergency services and individual landowners in flood-prone areas should prepare.

Flood Warning: Flooding is imminent or already occurring in specific watercourses or municipalities. Municipalities and individuals should take action to deal with flood conditions. This may include road closures and evacuations.