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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.

Ahmic Lake Water Level

Live lake level, flow, historical records and forecast for Ahmic Lake in Parry Sound, ON, Canada, built from official government gauge data.

About Ahmic Lake

Ahmic Lake - A hub of freshwater beauty in Parry Sound.

Ahmic Lake, located in the vibrant region of Parry Sound, Ontario, is a key component of the Magnetawan watershed. This lake serves not only as a popular destination for recreational activities but also plays a crucial role in the ecological health of the area. Surrounded by peer lakes like Doe Lake and Lake Bernard, Ahmic Lake provides ample opportunities for fishing, boating, and enjoying the seasonal changes that accompany its water levels.

The watershed context

Draining roughly 1,800 square kilometres, the Ahmic Lake watershed is characterized by a mix of natural landscapes and aquatic environments. Its connection to the Magnetawan watershed links it to other significant bodies of water and ecosystems within the region. The seasonal water patterns here follow the snowmelt-driven hydrology typical of southern Ontario, with spring freshet occurring from late April to May, resulting in elevated water levels. During the summer months, evaporation and low inflow cause a natural drawdown, providing a rhythmic ebb and flow to the lake's levels. As temperatures drop in autumn, the lake begins its early-winter decline as ice begins to form.

Why the data matters here

Understanding water levels at Ahmic Lake is essential for local residents, anglers, and outdoor enthusiasts. By monitoring the lake levels against historical data, we can identify trends and assess current conditions more accurately. Today’s readings reflect a comparison against the median for this calendar day over the past 19 years, provided by the Water Survey of Canada. This insight allows for a contextual understanding of the lake's current status, which is vital for planning recreational activities or evaluating ecological health. Rather than simply focusing on raw measurements, this median comparison helps capture a more nuanced picture of water variability, essential for those who rely on the lake for their activities and livelihoods.

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