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Flood Warning & Forecasting

Central Lake Ontario Conservation (CLOCA) monitors, on an ongoing basis, weather forecasts and watershed conditions at locations across the watershed.


Our Water Monitoring Network is a collection of stream gauges, rain gauges, air and water temperature probes, groundwater monitoring wells, snow measurement sites, surface water and groundwater quality sampling sites.  These measurements, weather forecasts and radar information on temperatures and rainfall predictions, along with historic data, are all taken into consideration when developing a flood forecast. 


The data is catalogued and analyzed to develop effective watershed wide management programs in support of our polices like the Flood Forecasting and Warning System, Low Water Response and Source Water Protection programs.  Observing trends over time requires long term tracking and monitoring. 

Is your property located in a floodplain?

Explore CLOCA’s floodplain mapping tool and find out if your property is located in the floodplain and how to prepare.

Subscribe to receive CLOCA Flood Messages.

Be Prepared

Take steps to protect yourself, your family and business in the event of a flood or other emergency.  Visit the following pages for more information

Flood Emergency

In the event of a flooding problem, call your local municipality.

Report Flooding

Central Lake Ontario Conservation


8:30 am - 4:30 pm

Holly Whittington, Environmental Engineering Technologist

905 579-0411 ext. 134

After Hours

905 579-0411, Option: 4

Flood Warning Messages


Central Lake Ontario Conservation Authority (CLOCA) monitors weather information, creek flows, snow pack and ice conditions in order to predict when floods will occur and how high the water may rise. When flooding is possible, or about to occur, CLOCA will issue flood messages to municipal emergency management officials and the media.

Flood Warning Messages
Normal Flood Warning Icon


No flood conditions exist.

Water Safety Statement Icon

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.

Flood Outlook Statement Icon

Watershed Conditions Statement - Flood Outlook

Early notice of the potential for flooding based on weather forecasts calling for heavy rains, snow melt, high winds or other conditions that could result in high runoff or ice jams, lakeshore flooding or erosion.

Flood Watch Icon

Flood Watch

Flooding is possible in specific watercourses or municipalities. Municipalities, emergency services and individual landowners in flood-prone areas should prepare.

Flood Warning Icon

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.

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