Rain forecast for the first week of May can be expected to cause water levels to rise significantly in the Ottawa River. Rainfall forecast for today could raise levels to what were reached last week. Additional rain forecast to fall this week can be expected to at least maintain levels and possibly cause further increases.around Lac Deschene, at Petrie Island and at Boise Village, east of Cumberland. Within the Rideau watershed, levels will increase but no flooding issues are expected at this time with the exception of Bobs and Christie Lakes which have continued to have high levels since the…

The rise of flood waters on the Ottawa River is slow but continuing and is approaching the 1:10 year flood frequency*. The slow rise of flood waters on the Ottawa River will continue today aided by runoff from the overnight rains. Levels had dropped yesterday on Lac Deschene but have risen again today. Downstream of Chaudiere Falls the rate of rise decreased slightly but that is likely to change with the impact of the rain. The locations at risk of flooding on the Ottawa River within the jurisdiction of the Rideau Valley Conservation Authority are communities around Lac Deschene (e.g.…