FLOOD WARNING: Ottawa River – Arnprior to Hawkesbury – Update #8

03-May-2019 03-May-2019

Weather Forecast:
Rainfall of 10 to 20 mm is forecasted today, May 3. An additional 5 mm of rain is possible on Monday, May 6, 2019.

Environmental Conditions:
Water levels along the lower Ottawa River have peaked and are expected to remain stable and slowly decline over the next few days.

All flood-prone areas along the Ottawa River from Lac Coulonge down to the Montreal Archipelago are at risk as snowmelt continues along the upper Ottawa River.

Levels are expected to remain high for the next two to three weeks. Risk is highly dependent on the amount of precipitation that is received.

Updates to all projections will be provided as they become available.

MVCA areas of concern: 
Water levels in the Constance Bay area have peaked and have begun to recede.

RVCA areas of concern:
Water levels in Britannia area (Grandview Road, Britannia Village, and the Belltown Community) and the area east of Cumberland Village (Boise Village, Morin Road, Leo Lane) have peaked and begun to recede.

SNC areas of concern:
Water levels in Clarence-Rockland and Alfred-Plantagenet have peaked and have begun to recede.

Residents in flood-prone areas are encouraged to closely monitor conditions and take necessary actions. Sandbags are available to residents in flood prone areas. 

Residents are strongly urged to keep sandbags in place for at least the next two weeks.

Residents are advised to stay away from watercourses where flows are high and where banks might be unstable. Parents are encouraged to explain dangers to children.

This Flood Warning is in effect until Tuesday, May 7, 2019 at 5:00 PM.

South Nation Conservation (SNC) and its Ottawa partners, the Rideau Valley and Mississippi Valley Conservation Authorities, monitor the water levels and weather forecasts with the Ministry of Natural Resources and Forestry as part of the Flood Forecasting and Warning Program. Updates are provided as conditions change.

Locally issued flood messages across Ontario are available at

The Ottawa River Regulation Planning Board will be reassessing forecast conditions and providing hydrological condition updates on its website daily at

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

For more information regarding the Ottawa River, visit  

FOR MORE INFORMATION: Omar Kana’n, Water Resources Analyst,

FOR MEDIA INQUIRIES: John Mesman, Team Lead of Communications,

FORWARDED TO: All Flood Forecasting and Warning Directory