The Ganaraska Region Conservation Authority advises that a low-pressure system will bring very mild temperatures and periods of rain this weekend.
Above average temperatures have depleted the snowpack over the past week, but the remaining snow is dense and ready to runoff as the melting continues.
The next two nights are forecast to remain well above freezing resulting in continuous melting of the remaining snowpack and river ice. When the storm arrives on Sunday, it will add runoff to local streams and accelerate the melting process.
Streamflows are currently flowing at seasonal levels after being elevated during warmer days and going down with the colder temperatures since Wednesday. Ice cover remains in many stream channels including the Ganaraska River, although it has weakened and become much thinner.
The forecast rain and warm temperatures may lead to water levels and flows that are capable of breaking up the remaining ice, which could lead to ice jams and localized flooding immediately upstream.
While no flooding is anticipated, higher than normal water levels and flows will occur in local streams. In addition, slippery stream banks and fast flowing, cold water will create hazardous conditions around all water bodies, especially in the vicinity of culverts and bridges.
All ice cover on streams, lakes and ponds should be considered weak and extremely hazardous. Please exercise caution around all water bodies and alert any children in your care of these hazards.
This Watershed Conditions Statement will be in effect until Monday, March 17th, 2024 at 10pm. 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.
Mike Smith Cory Harris, P.Eng.
Flood Operations Officer Flood Warning Coordinator
Author: Pete Fisher
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