The Lake Simcoe Region Conservation Authority advises that warmer weather accompanied by rainfall is expected to begin to move through the watershed on Wednesday, March 10 through Friday, March 12. This weather system is expected to bring temperatures well above seasonal values with daytime highs climbing above +10oC by Wednesday afternoon. Above zero temperatures are forecast for overnight Wednesday and daytime highs climbing to +17oC on Thursday. In addition, rainfall amounts around 3mm are predicted on Thursday.
Currently, portions of the watershed have a considerable snow pack. Due to the duration of the expected thaw, a significant reduction of this snow pack will occur. The expected rainfall coupled with the amount of ice and snow in storm drainage systems will increase the potential for blockage and ice jams, especially in the vicinity of culverts and bridges. This may result in localized flooding in some areas.
Also, warmer than normal temperatures will reduce or eliminate ice cover in our creeks and rivers, resulting in dangerous ice conditions. Children and pets should be warned to stay away from all watercourses.
This Watershed Conditions Statement - Flood Outlook will be in effect through Sunday, March 14, 2021.
For further information, contact duty officer Manish Kaushal at 905-895-1281.