A Texas Low will continue to track through the Great Lakes region today and is expected to bring 10-15mm of rain to the Maitland watershed along with a continued stretch of mild temperatures, reaching up to 9°C by this evening.
The snowpack has condensed considerably over the last few days and is susceptible to a quick melt. Snow water equivalents were measured in numerous locations yesterday and showed wide ranging values of 20-80mm water equivalent, with the lesser amounts in windswept open fields. It’s important to note that frozen soil surfaces were also observed in some locations. The rate of runoff will be dependent on rain amounts but is currently expected to cause a rise in river levels similar to what occurred last week, with many watercourses approaching or slightly exceeding bank-full conditions. Flooding in traditional low-lying areas is expected.
A rapid drop in temperatures tonight will prevent a prolonged melt event but may result in flash freezing and jamming of drainage pathways. Areas with existing ice jams are particularly at risk. Municipal staff should monitor local problem areas and be prepared for the closures of low-lying roads.
Residents are reminded to use caution near all watercourses. Ice on rivers and ponds will become very unstable today. Slippery streambanks and extremely cold and fast-flowing water will combine to create hazardous conditions.
Small increases in rain amounts will result in significant increases in melt and quickly heighten flood risk. Maitland Conservation staff will be closely monitoring the situation and will provide an update if conditions change. This message will remain in place until 4:00 p.m. on Friday February 25, 2022.
Contact: Jeff Winzenried, Flood Forecasting Supervisor
Media Contact: Jayne Thompson, Communications Coordinator
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.