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: April 27, 2017 - 10:00 am

Ontario flood map

Provincial Watershed Conditions Statement for Ontario Issued by the Surface Water Monitoring Centre of the Ministry of Natural Resources and Forestry

Locally issued flood messages

Issued by MNRF Districts and Conservation Authorities

MNRF Districts

  • Parry Sound - Flood Warning: Moon River/ Bala Reach and the South Branch of the Muskoka River. Flood Watch: North Branch Muskoka River, the District Municipality of Muskoka, the Territorial District of Parry Sound and a portion of the County of Haliburton. - April 24, 2017 11:30 am
  • Pembroke - Flood Warning - April 21, 2017
  • Wawa - Watershed Conditions Statement – Water Safety - April 25, 2017 12:00 pm

    Conservation Authorities

    • Cataraqui Region - Watershed Conditions Statement – Flood Outlook - April 27, 2017 1:00 pm
    • Hamilton - Watershed Conditions Statement – Water Safety - April 27, 2017 3:10 pm
    • Lower Trent - Watershed Conditions Statement – Flood Outlook - Lake Ontario - April 27, 2017 10:30 am
    • Mattagami Region - Watershed Conditions Statement – Water Safety - April 21, 2017
    • North Bay Mattawa - Watershed Conditions Statement – Flood Outlook - April 27, 2017 4:00 pm
    • Otonabee - Watershed Conditions Statement – Water Safety - April 24, 2017 10:20 am
    • Quinte - Watershed Conditions Statement – Flood Outlook - April 27, 2017 9:50 am
    • Toronto and Region - Watershed Conditions Statement – Water Safety - April 27, 2017 1:40 pm

    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

    Rainfall associated with a few low pressure systems that are currently tracking across northeast Ontario is forecast to bring scattered/widespread rainfall/snowfall for northern Ontario. Snow or mixed rainfall is forecast for northwest Ontario Wednesday and Thursday in the amount of 30 to 50 cm mainly for north of Lake Superior and Lake Nipigon. A line east of Wawa to Moosonee could receive rainfall in the cumulative amount of 30 to 60 mm in these two days.

    For southern Ontario rainfall is forecast in the amount of 10 to 20 mm for Wednesday and Thursday cumulatively with risk of thunderstorm at isolated locations resulting in an additional 10 to 15 mm.

    Daytime temperatures are likely to be between 10 to 20 degrees for most of southern Ontario Wednesday to Friday. Daytime high temperatures are forecast to be below zero degrees for most of northwest Ontario in the next few days and between zero to 20 degrees for northeast especially for southern and middle sections of this region.


    Water levels and flows across central and eastern Ontario remain elevated due to spring freshet and related operations. Recent precipitation and snow melt have maintained high water conditions in several local streams and watercourses over the past week and are currently returning to stable or falling conditions, at most gauging stations.

    Most of the snow has melted in the southern Ontario. Southern sectors of northern Ontario and further north could have significant snow remaining on ground with water equivalents of 100 to 150 mm. The warm temperature forecast for this week will continue to cause a gradual melt of snow. Additionally, forecast rainfall in the amount of 30 to 60 mm cumulatively until Friday for northeast Ontario, especially for areas to the east of Lake Superior, will augment stream flows and levels and result in continually high water conditions and possible flooding in vulnerable areas.

    Ice break-up along the Moose River is in progress in the Far North Region and higher water conditions in Albany and Attawapiskat watersheds.

    Lake Ontario Water Levels are higher than normal. High winds and wave action could cause flooding concerns on the shoreline. A close watch on meteorological conditions is recommended.

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

    This message will be in effect until (or updated before) Friday, April 28th, 2017 at 12 noon.

    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