Flood Warning & Forecasting

Subscribe to receive CLOCA Flood Messages.

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. 

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

Alana McDonald, Environmental Engineering Technologist

905 579-0411 ext. 134

905- 259-4579 (cell)


After Hours

905 579-0411, Option: 4

Flood Warning Messages


Central Lake Ontario Conservation 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, Central Lake Ontario Conservation will issue flood messages to municipal emergency management officials and the media.



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 rains, snow melt, high winds or other conditions that could result in high runoff or 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.

Healthy watersheds for today and tomorrow.
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Working in Partnership

Central Lake Ontario Conservation is a

non-profit agency and registered charity: BN: 106887102RR0001

© 2019 by Central Lake Ontario Conservation

100 Whiting Avenue, Oshawa, ON L1H 3T3

Email: mail@cloca.com, Phone: 905-579-0411