Forecast for 2023-04-27

River conditions forecasts posted on 2023-04-27 by Ottawa River Regulating Committee

Peak levels due to the melt of the snowpack in the uncontrolled part of the basin were reached on the main stem of the Ottawa River between April 21 and 23 depending on location. Additional spring runoff due to recent rainfall on the western and northern portions of the basin is slowing the rate of level decrease in downstream areas. From Mattawa down to Pembroke, levels are expected to continue rising today and tomorrow due to increasing outflow from reservoirs in the Abitibi-Timiskaming region, with minor flooding occurring in Pembroke. Between Lake Coulonge and Lake Deschenes, levels are expected to be fairly stable over the next few days. In the lower river reach between Ottawa/Gatineau and the Montreal area, levels are expected to continue their slow decline over the next few days.Note that levels could rise again should new weather systems bring additional precipitation on the basin.