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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.

Moira River near Tweed Water Level

Live river level, flow, historical records and forecast for Moira River near Tweed in Canada, ON, Canada, built from official government gauge data.

About Moira River near Tweed

Moira River - A key tributary of the Moira watershed.

The Moira River near Tweed flows steadily through Eastern Ontario, carving its path through a landscape shaped by countless seasons. It serves as an essential part of the local hydrology, draining approximately 1,760 square kilometres of the surrounding area. This river is a vital natural resource for the community, providing opportunities for recreation and supporting local ecology.

The watershed context

The Moira River is part of the broader Moira watershed, which encompasses several other waterways, including the Black River near Actinolite, the Clare River near Bogart, and the Skootamatta River near Actinolite. This interconnected system nourishes the land and offers a diversity of habitats along its banks. The region experiences a typical snowmelt-driven seasonal hydrology, where runoff from melting snow in late April to May contributes significantly to water levels. As summer progresses, natural drawdown occurs from July to September, leading to lower water levels as evaporation increases. With the approach of winter, the river sees a decline again as ice forms, marking the cyclical nature of the hydrological year.

Why the data matters here

Today's reading from the Moira River near Tweed provides a snapshot of the river's current state in comparison to its historical records, with data spanning over 24 years. By assessing the river's level against the median for this calendar day, Water Survey of Canada enables residents, cottagers, and local farmers to make informed decisions regarding water use and river activities. Understanding this context helps to highlight the importance of ongoing water monitoring in the face of natural seasonal variability and reinforces the need for consistent stewardship of local water resources.

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