The Hamilton Conservation Authority (HCA) is advising that strong shore-bound waves are currently forecasted for Saturday (April 25). There is potential for significant localized flooding and erosion along the Lake Ontario shoreline, due to the storm surge and wave action.
The predicted maximum Lake Ontario water level in the Hamilton area for April 25 is approximately 75.3 m IGLD85. In addition, maximum wave heights of 1.7 m are expected, as a result of predicted sustained winds from the north-east of up to 18 km/hr with maximum wind gusts of up to 31 km/hr.
HCA staff continue to monitor Lake Ontario wave and water level conditions closely.
Residents living along the Lake Ontario shoreline are urged to prepare accordingly and to pay close attention to wave conditions and lake levels. HCA wishes to remind all residents to stay away from lakefront areas during this time, as high winds and wave action may pose significant flooding, erosion, and public safety hazards.
Current shore-bound winds do not pose significant water safety concerns nor significant flooding concerns.
This message is in effect until Tuesday, April 28, 2026 at 4:30 PM, by which time it will either be updated or cancelled. HCA will issue updates prior to April 28 as needed.
There is one other active message at this time. A FLOOD WATCH – Inland Lake and River Flooding message was also issued at the same time as the above message.
For further information or questions regarding the two FLOOD WATCH messages, please contact:
Jonathan Bastien, Manager, Water Resources Engineering
Phone: 905-525-2181 ext 138
Mobile: 905-515-3087
Fax: 905-648-4622
Email: jbastien@conservationhamilton.ca
