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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.

Bow River at Calgary Water Level

Live river level, flow, historical records and forecast for Bow River at Calgary in Calgary, AB, Canada, built from official government gauge data.

About Bow River at Calgary

Bow River - a vital waterway through Calgary.

The Bow River, flowing through the heart of Calgary, is an integral part of the region's landscape and hydrology. It serves not only as a recreational outlet for many residents and visitors but also plays a critical role in managing the water resources that support local agriculture and urban activities. This river is part of the Headwaters Bow watershed, which captures rain and snowmelt from the surrounding foothills, serving as an important lifeblood to the communities it traverses.

The watershed context

The Bow River at Calgary is fed by a substantial drainage area, draining roughly 7,874 square kilometres upstream of this gauge. This expansive catchment ensures that the river has diverse input from both rainwater and snowmelt, making it responsive to seasonal changes in weather. In Alberta, the hydrological pattern is shaped by the presence of mountain snowmelt, which drives peak flows during late spring. Additionally, the region is susceptible to summer convective storms that can quickly raise water levels, contributing to the river's dynamics.

The Bow River is joined by several other notable locations along its course, including the Bow River at Banff, Cochrane, and Lake Louise, each sharing the same basin and contributing to the overall health and flow of the river system. Together, these sites provide valuable data for understanding hydrological changes over time.

Why the data matters here

Water metrics for the Bow River at Calgary are not merely numbers; they reflect the health of the ecosystem and the reliability of water supply for the region. Today's observed reading provides critical insight into current river conditions against historical data, specifically comparing today's elevation against the median for this calendar day over the last 50 years. This evaluation helps gauge the river's behaviour, assisting cottagers, anglers, and flood-watchers in making informed decisions.

The operating agency, Water Survey of Canada, emphasizes the importance of these comparisons, as they illustrate trends in river flow and provide context to fleeting conditions. In a province where snowmelt and sudden summer storms can drastically affect water levels, understanding these metrics can make all the difference in effective water management and safety.

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