Mississippi Valley Conservation Authority (MVCA) in conjunction with the Rideau Valley (RVCA), South Nation Conservation Authorities (SNC) and Ministry of Natural Resources & Forestry (MNRF) Kemptville District, cautions residents along the Ottawa River that water levels are expected to increase significantly over the weekend and into next week. However levels are not expected to reach those observed at the height of the flood in 2017 at this time.
The Ottawa River Regulation Planning Board has stated, “With significant rainfall forecasted later this week, levels will exceed minor flood levels over the 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.”
River Conditions Forecast / Flooding Risk: The current snowpack throughout much of the Ottawa River basin remains at twice its normal depth for this time of the year. Meteorological forecasts indicate that two low pressure systems will be combining to produce significant rainfall (30 to 55 mm) throughout the Ottawa River watershed beginning on Thursday. Combined with spring runoff from the central and southern portions of the watershed, this precipitation is expected to cause a rapid and sustained increase in water levels and flows on the main stem of the Ottawa River. The Regulating Committee will be reassessing forecast conditions and providing hydrological condition updates on its website daily at http://www.ottawariver.ca/forecast.php.
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.
This FLOOD WATCH statement is valid through April 23, 2019. Additional statements will be issued when or if conditions are expected to change significantly from this outlook.
Daily water levels and flows for the Mississippi Valley watershed are available on the MVCA website at http://mvc.on.ca/water-levels/. For more information regarding the Ottawa River, visit www.ottawariver.ca.
The Mississippi Valley Conservation Authority flood forecasting and warning program monitors weather conditions, snowpack water content, estimates expected river flows and water levels and issues flood advisories or warnings as required. MVCA provides early warning and continuous monitoring to municipal and provincial emergency response personnel through a flood event.