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Current Watershed Conditions


 

South Nation Conservation works with its partner municipalities along the South Nation, St. Lawrence and Ottawa Rivers to provide advanced notice of flooding and low water conditions through the provincial Flood Forecasting and Warning and Low Water Response programs.

 

MAPPED ROAD CLOSURES, FLOODED AREAS AND SANDBAG LOCATIONS

VIEW WATER LEVELS IN SOUTH NATION WATERSHED 

 

Current Watershed Conditions, Flood, and Drought Messages:

 

FLOOD WATCH
28-Mar-2025

SNC advises that a Flood Watch Statement is being issued in anticipation of freezing rain, rainfall, and snow melt next week.

Weather Forecast: 

Environment Canada is forecasting up to 15 cm of snow Saturday, turning into ice pellets and freezing rain Sunday. Rainfall of up to 30 mm of rain is forecasted by Monday evening, with up to an additional 20 mm of rain forecasted by the following Friday. Above seasonal temperature highs of 16°C are expected on Monday and Thursday.  

Environmental Conditions: 

The melting of snow and ice in combination with the forecasted rain beginning on Monday, can result in increased water levels and flows in local streams and rivers. Widespread flooding is not anticipated, however, fast flowing water and flooding of low-lying areas, floodplains, and areas with poor drainage is still possible. Low-lying areas are those that are regularly flooded during the spring freshet period. Water levels are expected to remain elevated through the week due to additional rainfall anticipated on Thursday. 

Risks: Rivers and streams across the jurisdiction may experience increases in water levels and flows and embankments may become unstable. Minor flooding is possible in low-lying areas and areas with poor drainage. 

ACTION: Residents are advised to exercise extreme caution when near rivers and waterbodies due to increasing river flows and slippery conditions. Any ice-covered bodies of water are considered unsafe. Parents are encouraged to explain these dangers to their children.

Residents in flood prone or low-lying areas, historically susceptible to flooding, should take the necessary precautions to protect their property. Please ensure:

  • Sump pump is clear, in good working condition and has a backwater valve on it.
  • Easy access to portable backup generator and pump.
  • Downspouts are clear and the outlet is at least 3 m from the dwelling.
  • Driveway culverts are clear of debris and drain well.
  • Securing items that might float away as flows increase.

Duration: 

This flood watch statement is in effect until April 4th, 2025 at 5 PM or until an update has been issued.

SNC monitors the water levels and weather forecasts as part of the Flood Forecasting and Warning Program. Updates are provided as conditions change.

Please visit www.nation.on.ca for more information. To provide feedback with respect to changes in water related conditions please email waterwatch@nation.on.ca, post on our Facebook (/SouthNationConservation) or Twitter (@SouthNationCA).

FOR MORE INFORMATION: Kat Watson, Coordinator, Early Warning Systems and Watershed Plans; 1-877-984-2948, kwatson@nation.on.ca. 

Forwarded to:  All Flood Forecasting and Warning Directory

 

South Nation Conservation

MEDIA CONTACT:
Erin Thorne, Communications Specialist, ethorne@nation.on.ca, 1-877-984-2948.

FLOOD DUTY OFFICER:
Katherine Watson, Coordinator - Early Warning Systems and Watershed Plans,
kwatson@nation.on.ca, 1-877-984-2948.

 

Definitions:

  • Water Conditions Statement: Water Safety: indicates that high flows, melting ice or other factors could be dangerous for such users as boaters, anglers, and swimmers but flooding is not expected.

 

  • Water Conditions Statement: Flood Outlook: gives early notice of the potential for flooding based on weather forecasts calling for heavy rain, snow melt, high winds, or other conditions.

 

  • Flood Watch: potential for flooding exists within specific watercourses and municipalities.

 

  • Flood Warning: flooding is imminent or occurring within specific watercourses and municipalities.

 

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Flood Forecasting and Warning 2025 Summary:

South Nation River Watershed

St. Lawrence River

Ottawa River

 

March 4, 2025: Flood Outlook Statement

March 10, 2025: Flood Outlook Statement

March 14, 2025: Flood Watch

March 17, 2025: Flood Watch - Update #1

March 20, 2025: Flood Watch - Update #2

March 28, 2025: Flood Watch - Update #3

 

March 19, 2025: Flood Outlook

 

Past Statements:

 

 

Water Conservation and Well Management Fact Sheets: