Flood Forecasting and Warning Program

Information about the Flood Forecasting and Warning Program, which prepares provincial and local authorities in the event of a flood.

Current flood information

Flood information updated as of: September 29, 2016 - 10:30 am

Ontario flood map

Flood Watch for Southwestern Ontario Issued by the Surface Water Monitoring Centre of the Ministry of Natural Resources and Forestry Thursday September 29th, 2016 at 10:30 am

Locally issued flood messages

Issued by MNRF Districts and Conservation Authorities

MNRF Districts


    Conservation Authorities

    River Regulatory Agencies


    Provincial Message

    Issued to Local Authorities by the Surface Water Monitoring Centre


    MNRF Districts

    Aylmer, Guelph

    Conservation Authorities

    Ausable Bayfield, Catfish Creek, Essex Region, Kettle Creek, Long Point Region, Lower Thames Valley, St. Clair Region, Upper Thames River

    Weather Situation

    Precipitation amounts in the 100mm range have been reported over the past 24 hours for portions of southwestern Ontario. An additional 20 to 40mm of precipitation is forecast for this area today. Thunderstorm activity may add to forecast precipitation amounts.


    Overnight precipitation has resulted in some minor flooding of low lying areas and road ways. Current conditions combined with forecast rainfall and potential thunderstorm activity may further contribute to flooding.

    A close watch on water levels and flows and local weather conditions is recommended.

    This message will be in effect until (or updated before) Friday, September 30, 2016 at 1:30 pm.

    Flood Message Definitions

    Provincial flood messages

    There are 2 types of provincial flood messages:

    • the Provincial Flood Watch, which provides consistent and timely technical information about the potential for flooding
    • the Provincial Watershed Conditions Statement, which provides information on provincial watershed conditions as they relate to flood potential, and an outlook on expected spring flood conditions

    Local flood messages

    There are 3 types of local flood messages:

    • flood warning: flooding is imminent or already occurring
    • flood watch: there is the potential for flooding
    • watershed conditions statements: flood Outlook (an early notice of the potential for flooding based on heavy rain, snow melt etc.) and water safety information.

    Who to contact for flood information

    Your local Conservation Authority is responsible for local flood messaging.

    Your local municipality is responsible for on-the-ground flood response.

    If you live in a community that is not serviced by a conservation authority, any flood watches or flood warnings in your area are issued by the nearest Ministry of Natural Resources and Forestry district office.


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    Updated: August 19, 2016