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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.

Water Stories

The flood of record that was overtaken

For five years, spring 2019 was the mark every Lake Muskoka decision answered to. In April 2026 the lake went two centimeters higher - and the official books have not caught up yet.

Why the Assiniboine floods every spring

Inside the freshet cycle that puts Manitoba shorelines at risk each year - and why 2026 broke the script.

How snowpack becomes summer water

The science of snow water equivalent and why it drives the season ahead.

Reading a staff gauge like a hydrologist

What the numbers on the measuring stick actually tell you.

Flash Flood Alley: how Texas rivers rise in hours

Why Central and South Texas rivers go from gravel beds to fifty-year records in an afternoon - including July 2026 on the Nueces.

What a "100-year flood" actually means

One percent, every year, forever - unwrapping hydrology's most misunderstood phrase, and how it differs from our own percentiles.

Esnagi Lake Water Level

Live lake level, flow, historical records and forecast for Esnagi Lake in Algoma, ON, Canada, built from official government gauge data.

About Esnagi Lake

Esnagi Lake - A hallmark of the Michipicoten - Magpie watershed.

Esnagi Lake, nestled in the Algoma region of Ontario, is a notable body of water within the Michipicoten - Magpie watershed. Surrounded by lush landscapes, it offers a snapshot of the region's ecological profile, where the interactions of water, land, and wildlife create a dynamic environment.

The watershed context

The lake is served by the Magpie River, and it drains a catchment area of approximately 703 square kilometres above the station. This expansive area contributes to the hydrological character of Esnagi Lake, which is shaped by the region’s snowmelt-driven seasonal patterns. The annual cycle sees a spring freshet occurring in late April to May as melting snow causes water levels to rise. During the summer months from July to September, the lake experiences a natural drawdown, a consequence of increased evaporation and lower inflow. As the year progresses into early winter, water levels decline further as ice forms on the surface.

Why the data matters here

Monitoring data from the Magpie River at Esnagi Lake provides valuable insights into the lake's hydrology. Current readings can be compared to the median for this calendar day across a historical record spanning more than 36 years. This comparison is essential, as it offers a clearer perspective on how current conditions stack up against historical norms, alleviating the ambiguity that a raw elevation figure might present. For those engaged in activities related to fishing, boating, or land management, understanding the context of water levels fosters informed decision-making. The Water Survey of Canada ensures that the data reflects the true dynamics of this vital waterway.

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