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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.

Grand Falls Flowage at Grand Falls Water Level

Live river level, flow, historical records and forecast for Grand Falls Flowage at Grand Falls in Canada, NB, Canada, built from official government gauge data.

About Grand Falls Flowage at Grand Falls

Grand Falls Flowage - A key feature of the St. Croix watershed.

The Grand Falls Flowage at Grand Falls serves as an important segment of the St. Croix watershed in New Brunswick. With a substantial drainage area of approximately 3,390 square kilometres, this body of water plays a critical role in the local hydrology and ecology. The flowage acts as a connector within the watershed, influencing nearby waterways such as Dennis Stream and Spednic Lake.

Why the data matters here

Today’s reading is derived from a long-term data set extending over more than 46 years, enabling a comprehensive understanding of the flow conditions in this area. Although the gauge does not measure discharge, monitoring the flow levels helps assess current trends and conditions. Understanding today’s water measurement relative to the median for this calendar day is vital, as it provides critical context regarding seasonal fluctuations and anomalies.

During the Atlantic hydrology season, the natural rhythm of water flow in New Brunswick is shaped by conditions such as snowmelt in spring, which can lead to freshet conditions and potential ice-jam risk on major rivers. The data garnered from the Grand Falls Flowage can inform local and seasonal changes, helping cottagers and anglers alike to better prepare for changing water levels and conditions.

By focusing on the comparison of today’s reading to the median, users can derive actionable insights into the evolving water levels. This is particularly important for users engaged in recreational activities or land management. This gauge’s record by the Water Survey of Canada underscores the flowage's significance in understanding the broader St. Croix watershed.

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