Nibi Metrics
Real-time water levels, forecasts, and alerts for lakes and rivers across Canada and the US. Built on official government data.
Nibi Metrics turns raw gauge readings from official hydrometric networks into something a person standing on a dock can actually use: is the water high or low for today, which way is it moving, and how unusual is this? This page explains where every number on the platform comes from and what we do to it along the way.
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The science of snow water equivalent and why it drives the season ahead.
What the numbers on the measuring stick actually tell you.
Why Central and South Texas rivers go from gravel beds to fifty-year records in an afternoon - including July 2026 on the Nueces.
One percent, every year, forever - unwrapping hydrology's most misunderstood phrase, and how it differs from our own percentiles.
Great Slave Lake Water Level
Live lake level, flow, historical records and forecast for Great Slave Lake in Mackenzie, NT, Canada, built from official government gauge data.
- Location Mackenzie, NT, Canada
- Watershed yellowknife
- Primary gauge 07SB001 (Water Survey of Canada)
About Great Slave Lake
Great Slave Lake - An immense and vital water body in the Northwest Territories.
Great Slave Lake, located in the Northwest Territories, is notable for its vast expanse and critical ecological role within the Yellowknife watershed. With a catchment area of approximately 956,000 square kilometres, it stands as the second-largest lake in Canada and provides essential resources and habitat for both wildlife and local communities.
The watershed context
The Yellowknife watershed supports a variety of water bodies, including Baker Creek, the Cameron River, and segments of the Yellowknife River. This interconnected web of waterways plays a crucial role in managing the hydrology of the region, particularly in the subarctic climate characterized by significant seasonal changes. The yearly hydrological cycle begins with dramatic spring breakups, where melting snow can lead to increased water levels and, occasionally, ice-jam flooding. As winters set in, the lake experiences low flows beneath a blanket of ice, which can affect water quality and aquatic life. These dynamics make it vital to monitor water levels year-round.
Why the data matters here
Current data for Great Slave Lake is monitored by Water Survey of Canada, detailing both absolute elevation and historical trends. This lake, with records spanning over 15 years, is crucial for understanding regional water patterns and ecological health. Comparing today's reading with the median for this calendar day provides context that enhances our understanding of current conditions. Regular monitoring helps assess fluctuations that can impact local ecosystems and human activities, from fishing to flood management. This proactive approach supports sustainable use of this essential resource.
How this page is built
Readings come from official government gauges and are rolled into daily records: the daily mean, high and low for every day on record. Each calendar day gets its own baseline from the full history, so the level you see is compared against what this specific date usually looks like rather than an annual average.
How Nibi Metrics works · Water stories
