GRCA Flood Message #1: GRCA Watershed Conditions Statement – Flood Outlook

Post-tropical storm Beryl is forecast to move through the Grand River watershed from late Tuesday, July 9, 2024 through to Thursday, July 11, 2024, bringing significant rainfall. 

Remnants of Hurricane Beryl are forecast to merge with an upper trough that is currently over central North America, creating a highly efficient conveyor belt of moisture into southern Ontario. Rainfall across the watershed is forecasted to be from 50 mm to 60 mm. However, there is the possibility of isolated areas receiving over 100 mm of rain. 

Water levels and flows are currently at their normal summer levels. The forecasted rain, combined with isolated thunderstorms with high rainfall intensities, can be expected to elevate water levels and produce significant amounts of localized runoff.  As a result, low-lying areas, areas with poor drainage and urbanized areas may experience flooding. 

GRCA reservoirs

GRCA reservoirs are at their normal operating level for this time of year and will be operated to manage runoff and reduce downstream flooding related to elevated river flows.

Stay safe 

The public is encouraged to exercise extreme caution around all local waterways. Banks adjacent to rivers and creeks are very slippery and, when combined with fast-moving water, pose a serious hazard. Children and pets should be kept away from all watercourses.

River conditions and forecasts are being monitored closely. This message will remain in effect until noon on Friday, July 12, 2024. Updated flood messages will be issued if needed.

More information

• For more information on flows, weather and reservoir conditions see the River Data section of the GRCA website.
• Safety information for parents and children is available in the GRCA’s River Safety Rules booklet.
• More information on the flood warning system is available on the GRCA website.
• Receive GRCA flood messages by e-mail by subscribing through the GRCA website.
• Follow GRCA flood messages on Twitter at grca_flood_msg.
• More information about how the GRCA manages floods is available in the Flooding section of the website.

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Media contacts:

James Clark, GRCA Senior Marketing and Communications Advisor
Phone 519-621-2763 x2240  |  Email jclark@grandriver.ca

Lisa Stocco, GRCA Manager, Strategic Communications and Environmental Education
Phone 519-621-2763 x2316 | Cell 226-755-3414 | Email lstocco@grandriver.ca