A FLOOD WARNING remains in effect for the Lake Nipissing Shoreline, La Vase River downstream of Lakeshore Dr, Parks Creek. A Watershed Conditions Statement – Flood Outlook continues for remainder of the North Bay-Mattawa watershed.
"Thunderstorms yesterday afternoon and overnight brought 35 to 64 mm of rain across the watershed. Water levels and flows have increased in response.," said Angela Mills, NBMCA Flood Duty Officer. "A cold front is forecast to pass through the watershed today, with a chance of thunderstorms that could bring 25 mm of rain later today (May 19)."
The water level of Lake Nipissing remains above the maximum non-damage elevation and is expected to continue to decrease. The water level of the Ottawa River at Mattawa is expected to be fairly stable, remaining near or slightly below minor flood levels in Mattawa per the Ottawa River Regulating Committee.
Residents are asked to keep children and pets away from shorelines and watercourses, and to avoid driving through flooded areas wherever possible. For flood emergencies, contact your local municipality. Residents of unincorporated townships should contact the Ministry of Natural Resources – North Bay District.
NBMCA staff will continue to monitor conditions as part of the Authority's Flood Forecasting and Warning Program and will issue updates as needed.
Current flood status and condition updates are available at nbmca.ca, on X (@theNBMCA), Facebook (@theNBMCA), and Instagram (@nbmcainfo).
This message is in effect until Tuesday, May 19, 2026, at 4:00 PM EDT.
Please note: NBMCA is responsible for local flood forecast and warning program within its jurisdiction, covering communities from North Bay and Callander to Mattawa. Where a Conservation Authority has not been established, the local MNR District Office is responsible for local Flood Forecast and Warning programs, including along the Ottawa River, see
NBMCA cannot assist with active flood response and does not control water levels or operate dams, our watershed is largely natural with very few control structures. The Parks Creek Backflood Control Structure, which prevents Lake Nipissing from flooding upstream into Parks Creek, is the one exception. Where a Conservation Authority has not been established, the local MNR District Office is responsible for Flood Forecast and Warning programs, including along the Ottawa River. MNR Flood Forecast and Warning.
CONTACT:
Angela Mills, Flood Duty Officer, cell: 705-497-4668
Paula Loranger, Community Relations Coordinator, cell: 705-494-5115