The St. Clair Region Conservation Authority (SCRCA) has issued a Watershed Conditions Statement – Flood Outlook in advance of potential thunderstorms expected to move through the region this evening and into Friday.
Environment and Climate Change Canada has issued a Special Weather Statement warning of storms capable of producing heavy downpours, which may lead to flash flooding, water pooling on roads, and localized flooding in low-lying areas.
Forecasts suggest rainfall amounts ranging from 15 to 60 millimetres overnight, with peak rainfall rates possibly reaching 30 to 50 mm per hour. The risk of severe thunderstorms continues through Friday, with rainfall totals of up to 80 mm and peak hourly rates near 40 mm. Areas hit by multiple storm cells could receive over 100 mm of rainfall by late Friday night.
“Due to the isolated and sporadic nature of these thunderstorms, the ability to predict rainfall for specific locations is low,” the SCRCA said in its statement.
Elevated water levels in natural floodplains and low-lying roads are expected. Saturated soils could lead to ponding, increased runoff into creeks and rivers, and heightened risks of erosion and seepage.
Urban areas are especially vulnerable to flash flooding from intense rainfall over a short period.
Residents are advised to use caution near waterways, as banks may be unstable and waters may be fast-moving. Children and pets should be kept well away from streams and rivers.
SCRCA continues to monitor watershed conditions and will issue updates as needed. Municipal emergency personnel and road crews are encouraged to monitor local conditions closely and stay alert to evolving forecasts.
The current advisory remains in effect until 12 p.m. on Saturday, June 28, unless updated earlier.
