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: December 10, 2016 - 10:00 am

Ontario flood map

Provincial Watershed Conditions Statement for the Province of Ontario Issued by the Surface Water Monitoring Centre of the Ministry of Natural Resources & Forestry on December 9th, 2016 at 11:00 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

    Algonquin Park, Aurora, Aylmer, Bancroft, Chapleau, Cochrane, Dryden, Fort Frances, Guelph, Hearst, Kemptville, Kenora, Kirkland Lake, Midhurst, Nipigon, North Bay, Parry Sound, Pembroke, Peterborough, Red Lake, Sault Ste Marie, Sioux Lookout, Sudbury, Thunder Bay, Timmins, Wawa

    Conservation Authorities

    Ausable Bayfield, Cataraqui Region, Catfish Creek, Central Lake Ontario, Credit Valley, Crowe Valley, Essex Region, Ganaraska Region, Grand River, Grey Sauble, Halton, Hamilton, Kawartha, Kettle Creek, Lake Simcoe Region, Lakehead Region, Long Point Region, Lower Thames Valley, Lower Trent, Maitland Valley, Mattagami Region, Mississippi Valley, Niagara Peninsula, Nickel District, North Bay Mattawa, Nottawasaga Valley, Otonabee, Quinte, Raisin Region, Rideau Valley, Saugeen, Sault Ste Marie Region, South Nation, St. Clair Region, Toronto and Region, Upper Thames River

    Weather Situation

    The Province of Ontario is forecast to experience below normal temperatures starting Friday, continuing through the weekend and extending into Monday. Day time temperature should see a dropping trend and range anywhere from -10 to -15 degrees centigrade or lower as we progress into the weekend and colder in the overnight hours. Wind chill values are likely to be lower than -15 to -20 degrees centigrade in several areas in the Southern Region and below -35 to -45 in several areas in the Northern region.


    Stream flows are seasonal for this time of the year in several areas covered in this message. Current and forecast weather conditions are ideal for the formation of Frazil ice on open water.

    Lack of ice cover and exposure of the water surface to cold temperatures and/or wind chills below -18 degrees C can trigger the formation of frazil ice which can accumulate quickly on bridge abutments, piers and riverbanks. Consequently water levels can rise quickly upstream of areas with frazil or anchor ice constrictions and lead to localised high water conditions or flooding in vulnerable areas.

    A close watch on local forecasts and conditions is recommended.

    This message will be in effect until (or updated before) Monday 12th, 5:00 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