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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.

Raisin River near Williamstown Water Level

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

About Raisin River near Williamstown

Raisin River - a vital watercourse in the Upper St. Lawrence basin.

The Raisin River near Williamstown is a dynamic waterway that plays a crucial role in the hydrology of the Upper St. Lawrence region. This river gathers waters from a drainage area of approximately 365 square kilometres, reflecting the natural environment that defines its character and importance. As it flows through the landscape, the Raisin connects with various tributaries and peers like the Garry River and Riviere Beaudette, contributing to a diverse aquatic landscape.

The watershed context

Flooding and drying patterns here are dictated by seasonal rhythms, characterized by a snowmelt-driven hydrology. Each spring, the river swells with runoff from melting snow, typically peaking from late April to May. This seasonal freshet is a vital source of water for the rivers and streams completing the Upper St. Lawrence basin. As temperatures rise and ice begins to form in early winter, flow rates naturally decline, followed by a period of low inflow during the summer months.

The Raisin River serves as an ecological corridor for various aquatic species, sustaining local biodiversity. Nearby water bodies, including the Raisin River at Black River and the Riviere Delisle, further interact within the watershed, collectively maintaining the health of this intricate ecosystem.

Why the data matters here

Understanding the current state of the Raisin River is essential for managing local water resources effectively. Today’s reading from the gauge at Raisin River near Williamstown is significant when compared against the median for this date over the past 49 years. This context helps in gauging the river's health and its ability to provide ecosystem services as well as water supply for agricultural and recreational needs. The data is managed by the Water Survey of Canada, ensuring that the information is reliable and contributes to informed decision-making in the region.

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