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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.

Assiniboine River North of Griswold Water Level

Live water level, flow, historical records and forecast for Assiniboine River North of Griswold in Canada, MB, Canada, built from official government gauge data.

About Assiniboine River North of Griswold

Assiniboine River North of Griswold - a significant segment of the Manitoba river system.

The Assiniboine River North of Griswold marks an important chokepoint in the dynamics of the Central Assiniboine - Oak watershed. Flowing through Manitoba, this section of the river supports the ecological and hydrological health of the surrounding areas.

The watershed context

This river segment drains a considerable catchment area of approximately 80,200 square kilometres, integrating numerous tributaries, wetland areas, and natural landscapes. Along with its peer, the Assiniboine River East of Virden, the river plays a vital role in the broader hydrology of the region. The nature of prairie hydrology is characterized by the spring snowmelt floods that dramatically impact water levels, particularly in the Assiniboine and Red basins. As seasonal patterns unfold, the summer typically sees a natural recession in water levels due to evaporation and reduced inflow.

Why the data matters here

Monitoring data from this station is crucial for understanding the hydrological behavior of this river segment. While it does not measure discharge, consistent elevation readings contribute to a clearer picture of seasonal changes and flood risks in the region. Knowing the current water level in relation to the long-term median for this time of year can provide valuable insights for farmers, cottagers, and local planners.

Today's reading from the Assiniboine River North of Griswold shows how these water levels compare to the historical median for this day across 14 years of record. This context beats raw elevation figures as it demonstrates trends and variations that are vital for managing water-related activities in the area.

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