The Grand River Conservation Authority has issued the following Flood Watch message.
The weather system that brought mild temperatures and approximately 10 mm of rain across the Grand River watershed on Monday has melted much of the snow pack across the watershed resulting in increased runoff into local waterways.
Temperatures returned below freezing by late Tuesday morning reducing the volume of runoff during this event. Runoff from northern portions of the watershed is now moving through the central reaches of the watershed and will continue to move downstream of Brantford over the next few days.
The remaining runoff will result in minor flooding in low lying areas typically prone to flooding. As runoff moves through the central and southern portions of the watershed, there is the potential for ice jams in Cambridge, Brantford, Cayuga and Port Maitland.
Ice jams can occur quickly and without warning. Residents in areas prone to ice jams should prepare accordingly. Conditions will be monitored closely.
Brantford: Flows are expected to peak in the Grand River through the City of Brantford late Tuesday evening. Ice flowing down from upstream has formed a jam in the Grand River through the City of Brantford. The dike and floodwall are preventing flooding.
Caledonia to Cayuga: River ice is still present in the southern river. Potential for ice jams and flooding is possible in low lying areas that are typically prone to flooding. These areas include River Drive (south of Caledonia), Sims Lock Road, Grand Sports Road, Town of Cayuga and community of Port Maitland.
The public is reminded to exercise extreme caution around all water bodies. Banks adjacent to rivers and creeks are very slippery at this time and, when combined with current weather conditions, pose a serious hazard. Parents are encouraged to keep their children and pets away from all watercourses and off frozen water bodies, which will be weakened as a result of the warming trend.
This message will remain in effect until noon on Thursday February 7. Updated flood messages will be issued as conditions develop and better forecast information becomes available.