EASTERN ONTARIO — The start of forecasted rainfall tomorrow is expected to produce “minor flood levels” over Easter weekend in flood-prone areas along the Ottawa River at Lake Coulonge, Chats Lake, Britannia / Lac Deschênes, Pointe-Gatineau, Ottawa / Cumberland, Rockland, Thurso and other vulnerable areas down to the Montreal Archipelago.
That’s according to local watershed authorities, including those at South Nation Conservation. SNC warns of “rapid and sustained increase in water levels” on the Ottawa River in light of an expected 40 to 50 mm of rain combined with runoff from the melting of a thick Ottawa Valley snowpack — currently at twice the normal depth for this time of year.
Levels are not expected to reach those observed at the height of the 2017 Ottawa River flood.
Residents are advised to stay away from watercourses where flows are high and where banks might be unstable. Parents are encouraged to explain these dangers to their children.
The Ottawa River Regulation Planning Board will be reassessing forecast conditions and providing hydrological condition updates on its website daily at www.ottawariver.ca/forecast.php.