Flood Forecasting and Warning

Status: Flood Outlook Statement

Flood Outlook Statement

Thursday, August 8, 2024 (9:30 AM)

Status: Flood Outlook Statement

The Raisin Region Conservation Authority (RRCA) is issuing a Watershed Conditions Statement – Flood Outlook for the RRCA jurisdiction. A Flood Outlook is issued to provide early notice of the potential for flooding based on weather forecasts calling for heavy rain.

Weather Forecast: A low pressure system interacting with the remnants of Tropical Storm Debby is expected to give heavy rainfall for eastern Ontario tonight through Friday. Rain will taper off Friday night. Environment Canada forecasts 50 to 75 mm of rainfall with locally higher amounts possible. 

Environmental Conditions: Current water levels are at, or slightly above, normal for this time of year in the RRCA jurisdiction due to recent rain events. The anticipated rainfall beginning tonight and continuing into Friday will result in increased water levels and flows in rivers, similar to those observed during the spring freshet.

Risks: All rivers and streams across the jurisdiction may experience high water levels, fast flowing water and slippery or unstable banks. Flooding is possible in low lying areas. 

In North Glengarry: High risk of water backing up in areas typically susceptible to spring flooding downstream of Mill Pond. The water levels of Loch Garry, Middle Lake, and Mill Pond are being actively managed. Sudden increases in dam outflow may be necessary under the forecast weather conditions. 

Residents in areas regularly affected by spring flooding should take precautions to protect their property, such as:

  • Securing items that might float away as flows increase.
  • Removing items from sheds, garages, basements, or lower floors that could be subject to flooding.
  • Ensuring sump pump is clear, in good working condition, and has a backwater valve.
  • Ensuring easy access to a portable backup generator and pump.

This statement is in effect until Monday, August 12, at 9:00 AM. The RRCA will continue monitoring water levels and weather forecasts as part of the Flood Forecasting and Warning program. Updates will be provided as conditions change.

For more information: Jason Symington, Resource Specialist, 613-938-3611 ext. 239, jason.symington@rrca.on.ca

Media contact: Lisa Van De Ligt, Team Lead, Communications & Stewardship, 613-938-3611 ext. 223, lisa.vandeligt @rrca.on.ca

Forwarded to: RRCA Flood Forecasting and Warning Directory

 


About Flood Forecasting and Warning in the RRCA

The Ontario Ministry of Natural Resources and Forestry (MNRF) is responsible for flood related emergencies. Flood forecasting and warning has been delegated to Conservation Authorities. If a local emergency is declared, MNRF will work directly with the municipality and in consultation with the Conservation Authority.

The Raisin Region Conservation Authority monitors precipitation and water levels throughout Cornwall, South Glengarry, and large portions of North Glengarry and South Stormont.

About Flood Forecasting Notices

Normal
No flood conditions exist.

Watershed Conditions Statement - Water Safety
High flows, unsafe banks, melting ice or other factors that could be dangerous for recreational users such as anglers, canoeists, hikers, children, pets, etc. Flooding is not expected.

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.

In the event of a flood status of anything other than normal, the RRCA will issue a media release and advise our member municipalities.

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