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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 Lake Water Level

Live lake level, flow, historical records and forecast for Grand Lake in Muskoka, NB, Canada, built from official government gauge data.

About Grand Lake

Grand Lake - A vital part of the Lower Saint John watershed.

Grand Lake, located in New Brunswick, is a significant body of water that contributes to the larger Lower Saint John - Grand Lake watershed. With a drainage area of approximately 2,960 square kilometres feeding into the lake, this region plays an essential role in the local hydrology.

The watershed context

The Lower Saint John watershed encompasses a diverse landscape, featuring various peer bodies of water such as French Lake and the Jemseg River. Grand Lake serves as a vital connector in this watershed, influencing the aquatic health and water cycles in the region. In spring, New Brunswick experiences a freshet due to snowmelt, which can cause fluctuations in water levels, making it important for local communities to monitor conditions. Ice cover during winter can also impact the lake and its surroundings.

Why the data matters here

Today's reading for Grand Lake is a crucial piece of information, as it provides insights into the current hydrological conditions in the region. Understanding how the water level compares to the median for this date over the last 14 years allows for a better assessment of potential risks, such as flooding or drought. Monitoring by the Water Survey of Canada helps to ensure that communities are informed about changes in water levels and can act accordingly. This data provides a more nuanced understanding than simply looking at raw elevation numbers, highlighting trends and variations essential for sustainable management of this important water body.

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