Ottawa

How high could the Ottawa River get: Sunday's forecast

The 2019 spring floods are now the most severe on record in some areas west of Ottawa-Gatineau.

All-time records set in Lac Coulonge and Arnprior, west of the capital

The Ottawa-Gatineau region's 2019 floods are officially the worst on record in some areas along the Ottawa River, with more records poised to fall as the river keeps rising over the next one to three days.

The Ottawa River Regulating Committee, which controls reservoir levels along the length of the river basin, said levels are expected to peak in Ottawa Tuesday and Wednesday.

According to the committee's 5 p.m. Sunday forecast, the river is already at record-breaking levels in Lac Coulonge, east of Pembroke, Ont., as well as in Arnprior, Ont., and Ottawa.

The current level at Lac Coulonge is 108.93 metres above sea level, 41 centimetres above the previous record set in 2017.

The water level in Arnprior is 76.09 metres above sea level, 14 centimetres above the record set in 2017.

Records were also broken at Britannia in Ottawa on Sunday, when the water level rose to two centimetres above the peak in 2017.

The Hull marina in Gatineau is expected to break a record in the coming days.

The levels are not expected to hit all-time highs in Pembroke and Hawkesbury, though Pembroke is already experiencing much higher waters than it did in 2017.

The water is expected to rise:

  • Another 47 centimetres in Lac Coulonge.
  • Another 26 centimetres in Arnprior.
  • Another 39 centimetres in Britannia.
  • Another 50 centimetres in Hull.
  • Another 21 centimetres in Thurso.
  • Another 16 centimetres in Hawkesbury.

Can't see the infographics above? Click here for this year's forecasted river level peaks, and click here to see how much higher water levels are expected to be this year than in 2017.

The next update is expected at 5 p.m. Sunday.

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