News

Flood Watch continues in Mattawa

A FLOOD WATCH remains in effect for the Mattawa River, downstream of Hurdman Dam to the Ottawa River.

“Water levels remain elevated in the lower reaches of the Mattawa River due to high flows from upstream tributaries to the Ottawa River. Flooding is expected to persist where it is already occurring ,” said Angela Mills, NBMCA Flood Duty Officer. “Water levels in the remainder of the watershed in local rivers have peaked and are near normal for this time of year.”

FLOOD WATCH – Mattawa River downstream of Hurdman Dam

A FLOOD WATCH remains in effect for the Mattawa River, downstream of Hurdman Dam to the Ottawa River. The Watershed Conditions Statement – Flood Outlook previously issued for the remainder of the North Bay–Mattawa watershed has ended.

FLOOD WATCH and Watershed Conditions Statement – Flood Outlook issued April 29, 2025

A FLOOD WATCH has been issued for the Mattawa River downstream of Hurdman Dam to the Ottawa River. The FLOOD WATCH previously issued for Chippewa Creek has ended and a Watershed Conditions Statement – Flood Outlook remains in effect for the remainder of the North Bay–Mattawa watershed, including Chippewa Creek.

FLOOD WATCH and Watershed Conditions Statement – Flood Outlook - April 25

A FLOOD WATCH has been issued for Chippewa Creek and Watershed Conditions Statement – Flood Outlook remains in effect for the remainder of the North Bay–Mattawa watershed, according to the North Bay-Mattawa Conservation Authority (NBMCA).

Watershed Conditions Statement - Flood Outlook and Water Safety

A Watershed Conditions Statement – Flood Outlook has been issued for the North Bay-Mattawa watershed and Watershed Conditions Statement – Water Safety has been issued for the Lake Nipissing Shoreline in North Bay and Callander and the lower reaches of the Mattawa River in Mattawa, according to the North Bay-Mattawa Conservation Authority (NBMCA).

Snow Survey Readings for April 15

The snow depth has decreased by 18.8 cm and snow water equivalence decreased by 55.0 mm since April 8, reports the North Bay-Mattawa Conservation Authority who measures snow depth and water content as part of its Flood Forecasting and Warning Program. 

Snow Survey Readings for April 8, 2025

The snowpack has decreased by 5.1 cm while the snow water equivalence has decreased by 21.3 mm since the previous snow survey on April 1, 2025, reports the North Bay-Mattawa Conservation Authority (NBMCA) who measures snow depth and water content as part of its Flood Forecasting and Warning Program.

Water Safety Statement - April 4, 2025

A Watershed Conditions Statement – Water Safety remains in effect for the North Bay-Mattawa watershed.

Snow Survey Readings for April 1, 2025

There was no change in snow depth, while snow water equivalence increased by 19.3 mm since March 25, reports the North Bay-Mattawa Conservation Authority who measures snow depth and water content as part of its Flood Forecasting and Warning Program. 

Water Safety Statement remains in effect

A Watershed Conditions Statement – Water Safety remains in effect for the North Bay-Mattawa watershed.