KINGSTON – The Cataraqui Region Conservation Authority (CRCA) has extended the Flood Warning today for Lake Ontario and the St. Lawrence River.
Lake Ontario and the St. Lawrence River remain under a Flood Warning due to record high water levels. The International Lake Ontario – St. Lawrence River Board is continuing operations and maintaining high outflow volumes to minimize flooding and erosion impacts when possible.
The Board reports that the average water level for Lake Ontario was 75.87 metres (m) as of May 31, 2017. This is 5 cm above the record high of 75.82 m for this time of year set in 1952, and remains above the highest water levels observed since recording began in 1918. Lake Ontario’s provisional monthly mean water level was 75.80 m in May. This is the highest monthly mean in any month since 1918.
Lake wide average water levels have been fairly stable over the past 10 days; however, levels may vary locally due to changing wind patterns. The Board predicts that water levels will start to gradually decline at some point over the next several weeks.
The water level measured today at Kingston is currently 75.8 m which is just 0.2 m below the Lake Ontario 100-year flood elevation of 76.0 m. The current level of the St. Lawrence River measured at Brockville is 75.5 m. This is just 0.3 m below the 100-year level of 75.8 metres in that area along the River.
The CRCA is urging residents to pay close attention to forecasts for approaching storms with high winds from the southeast, south or southwest, and note that the above mentioned 100-year flood elevations do not include wave uprush (increased water levels onto the shoreline resulting from high waves). Flooding and erosion damage from high waves is possible during periods of strong winds.