The St. Clair Region Conservation Authority has issued a Flood Watch for the entire watershed due to rising water levels, continued rainfall and ongoing snowmelt.
Above-seasonal temperatures combined with between five and 20 millimetres of rain over the past week have led to a deteriorating snowpack and elevated water levels. In some locations, water has already spilled into natural floodplains and low-lying areas. The authority says recent rainfall and snowmelt have reduced the soil’s ability to absorb additional precipitation, increasing the potential for runoff.
Environment forecasts call for an additional 10 to 15 millimetres of rain late Thursday into Friday, with another five to 10 millimetres possible on Saturday. Temperatures are expected to remain above freezing through Friday before dropping below freezing overnight, followed by a brief return to milder conditions on Saturday.
Water levels are expected to rise quickly and may result in pooling on roads and agricultural fields. If rainfall reaches the higher end of the forecast, some roads could be impacted. Municipal staff are being advised to closely monitor local conditions, particularly in areas with known drainage issues. Any remaining ice in watercourses could restrict flows during runoff events and increase the risk of flooding.
Residents are being reminded to stay away from watercourses and flooded areas due to hazardous conditions, including slippery banks, unsafe ice and fast-moving cold water. Children and pets should be kept well back from affected areas.
The conservation authority says it will continue to monitor watershed conditions and will issue further advisories to municipalities and the media if flood concerns develop. The Flood Watch is expected to remain in effect until noon on Monday, Jan. 12, unless updated sooner.
