An approaching low-pressure system is expected to move across the Maitland and Nine Mile River watersheds this afternoon (Saturday, December 12, 2020). This weather system will be slow-moving, bringing with it upwards of 40mm of rain, followed by the potential for freezing rain and snow into Sunday. A moderate and widespread rainfall arrived across the watersheds early this morning, resulting in near-saturated ground conditions. Heavier rainfall expected late this morning into early afternoon may be more localized.
Based on the current weather forecast major flooding is not anticipated at this time. Flooding will be limited to traditional low-lying floodplain areas. Water levels in headwater streams (Lucknow, Harriston, Listowel) are expected to peak on Sunday. Water levels downstream in the larger rivers (Wingham, Benmiller) are expected to peak on Monday.
Residents are reminded to stay away from all watercourses. Extremely cold and fast-moving water, combined with slippery and unstable stream banks will create hazardous conditions near all watercourses.
This message will remain in effect until 10:00 a.m. on Wednesday, December 16th, unless local conditions warrant further updates. Maitland Conservation will continue to monitor watershed conditions and will provide an update if required.
Jeff Winzenried, Water Resources Technician
Jayne Thompson, Communications Coordinator
519-335-3557 ext. 226 Cell: 519-357-6670
Types of Flood Messages:
Watershed Conditions Statement – Water Safety – General watershed conditions are being assessed for high runoff potential that could lead to flooding, and to remind the public of general river safety issues.
Watershed Conditions Statement – Flood Outlook – Early notice of the potential for flooding based on weather forecasts calling for heavy rain, snow melt, high wind or other conditions that could lead to high runoff, cause ice jams, lakeshore flooding or erosion.
Flood Watch – Flooding is possible in specific watercourses or municipalities. Municipalities, emergency services and individual landowners in flood-prone areas should prepare.
Flood Warning – Flooding is imminent or already occurring in specific watercourses or municipalities. Municipalities and individuals should take action to deal with flood conditions. This may include road closures and evacuations.