(North Bay, Ontario, March 25, 2025) With the significant amount of melt in the past week, the snowpack has decreased by 21.4 cm and the snow water equivalence has decreased by 65.3 mm since the previous snow survey on March 14, 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.

“The combined average snow depth is 30.5 cm and water equivalence is 83.3 mm at the three snow course locations”, said Angela Mills, NBMCA Water Resources Specialist. “This is within the range of normal for late March.”

NBMCA is now measuring the snowpack weekly, to monitor conditions leading up to and during the spring freshet. This is a supplementary survey; more data is required for comparison to historical conditions. A Snow Survey page on our website is available with more snow survey program information and this season's measurements. https://nbmca.ca/watershed-management/snow-survey/

Snow is measured for depth and water equivalence at three locations in the watershed.

North Bay Golf and Country Club (Chippewa Creek Watershed, North Bay)                                  

Current Snow Depth for March 25, 2025

35.4 cm 

Current Snow Water Equivalence for March 25, 2025

98.0 mm 

Snow Depth for March 22, 2024

17.7 cm

Snow Water Equivalence for March 22, 2024

33.0 mm

Corbeil Conservation Area (La Vase River Watershed, Corbeil)

Current Snow Depth for March 25, 2025

26.3 cm  

Current Snow Water Equivalence for March 25, 2025

75.0 mm 

Snow Depth for March 22, 2024

  5.0 cm

Snow Water Equivalence for March 22, 2024

  8.0 mm

Shirley Skinner Conservation Area (Kaibuskong River Watershed, Chisholm)

Current Snow Depth for March 25, 2025                

    29.8 cm

Current Snow Water Equivalence for March 25, 2025

    77.0 mm

Snow Depth for March 22, 2024                  

    9.0 cm

Snow Water Equivalence for March 22, 2024

    12.0 mm

The North Bay-Mattawa Conservation Authority (NBMCA) was founded in 1972 by the Province of Ontario. NBMCA is one of 36 Conservation Authorities in Ontario responsible for watershed management on behalf of local municipalities, stakeholders, and the province.

The public can follow NBMCA on the web at nbmca.ca, on X (Twitter) (@theNBMCA), Facebook (@theNBMCA) and Instagram (nbmcainfo).

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For more information, contact: 

Angela Mills, Water Resources Specialist (705) 497-4668
Paula Loranger, Community Relations Coordinator (705) 474-5420