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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.

Cobourg Brook near Precious Corners Water Level

Live river level, flow, historical records and forecast for Cobourg Brook near Precious Corners in Canada, ON, Canada, built from official government gauge data.

About Cobourg Brook near Precious Corners

Cobourg Brook - A tributary of the Ganaraska watershed.

Cobourg Brook flows gracefully near Precious Corners in Ontario, contributing to the rich tapestry of the Ganaraska watershed. This quaint river is part of a vibrant network of waterways, including notable peers such as Baltimore Creek and Oshawa Creek. With a drainage area of approximately 33.7 square kilometres above the station, Cobourg Brook plays an important role in the local hydrology.

The watershed context

The Ganaraska watershed is shaped by seasonal rhythms, with snowmelt driving flows during the spring freshet from late April to May. As temperatures rise, the resulting runoff replenishes the brook, enhancing its flow and supporting the aquatic ecosystems that thrive along its banks. During the summer months, the natural drawdown takes place as evaporation and decreased inflow reduce water levels from July to September. This cycle is integral to maintaining the health of the river and its surrounding habitat.

Why the data matters here

Monitoring the waters of Cobourg Brook is essential for understanding water quality, ecological health, and flood risks in the Ganaraska watershed. Data from the Water Survey of Canada enables locals, farmers, and outdoor enthusiasts to stay informed about current conditions and seasonal changes. Today's reading provides critical context: it is compared against the median for this calendar day across 19 years of historical data, giving a clear perspective on changes in water levels. This approach is more meaningful than looking at raw elevation alone, as it allows us to gauge the river's performance relative to its expected behavior.

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