Flood Potential: Low
The Ganaraska Region Conservation Authority advises that a low pressure system is moving into Southern Ontario this evening ahead of a second storm later this week. Rain is expected to start overnight with total rainfall amounts of 20 to 30mm by noon tomorrow, when the system is expected to taper off and move out of the region. A second storm event is expected to begin on Wednesday night with possibly 30mm or more rainfall..
Most of the runoff associated with last Friday’s storm event has passed through the watersheds, however soil conditions remain wet and storage areas such as wetlands and ponds have reduced capacity to absorb more runoff.
The forecasted rainfall combined with wet watershed conditions will result in higher than normal water levels and flows in all our local streams. With the next storm arriving shortly after, a second round of runoff is expected to follow on Thursday and into Friday. No flooding is anticipated at this time.
Additionally, slippery stream banks, and fast flowing, cold water will create hazardous conditions around bodies of water, especially in the vicinity of culverts and bridges. Children should be warned to stay away from all watercourses.
This Watershed Conditions Statement will be in effect through Friday, April 7th, 2017. Conservation Authority staff will continue to monitor watershed conditions and provide updates as necessary. Should you have any questions or wish to report flooding, please contact the following GRCA staff at 905-885-8173.
Flood Operations Officer
Mark Peacock, P.Eng.
Flood Forecasting and Warning Coordinator