The St. Clair Region Conservation Authority issued a watershed conditions statement and flood outlook on Friday, March 31, 2023.
SCRCA officials say 20 – 45 mm of rain is expected in the next 24 hours, along with saturated soils, increased runoff, elevated water levels and the potential for minor flooding.
“A Colorado low moving into Ontario is expected to bring sustained rainfall over the next 24 hours,” SCRCA officials say.
“Total accumulations for this event are forecast between 20 mm and 45 mm, with upwards of 35 mm falling today and a further 10 mm on Saturday. Rainfall amounts may vary depending on location.”
SCRCA officials added: “Rainfall may be intense at times; high amounts of rainfall in a short period of time can lead to increased runoff and flash flooding, particularly in urban areas. Soils are anticipated to become saturated from the rain and could contribute to ponding, increased runoff into watercourses, and possible increased erosion and seepage issues. Rising water levels may spill into natural floodplain areas, parks and fields.”
Individuals are reminded to avoid watercourses and flooded areas due to dangerous conditions, slippery banks and cold, swift moving water, SCRCA officials added.
“Children and pets should be kept away from the water,” SCRCA officials say.
The Conservation Authority continues to monitor watershed conditions and will issue advisories to municipalities and media should flood issues arise.
Municipal emergency response staff and road superintendents should monitor local conditions closely.
This message will remain in effect until Monday, April 3, 2023 at 12 p.m. unless otherwise updated.