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
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.
Inside the freshet cycle that puts Manitoba shorelines at risk each year - and why 2026 broke the script.
The science of snow water equivalent and why it drives the season ahead.
What the numbers on the measuring stick actually tell you.
Why Central and South Texas rivers go from gravel beds to fifty-year records in an afternoon - including July 2026 on the Nueces.
One percent, every year, forever - unwrapping hydrology's most misunderstood phrase, and how it differs from our own percentiles.
Ivanhoe Lake Water Level
Live lake level, flow, historical records and forecast for Ivanhoe Lake in Sudbury, ON, Canada, built from official government gauge data.
- Location Sudbury, ON, Canada
- Watershed upper groundhog
- Primary gauge 04LC002 (Water Survey of Canada)
About Ivanhoe Lake
Ivanhoe Lake - A tranquil retreat in the Upper Groundhog watershed.
Nestled in Sudbury, Ontario, Ivanhoe Lake offers a natural haven characterized by its significant drainage area of roughly 1,345 square kilometres. This lake, unmarked by neighbouring water bodies, is part of the Upper Groundhog watershed, known for its seasonal water patterns primarily driven by snowmelt.
The watershed context
The Upper Groundhog watershed serves as a vital ecological system within the region, functioning to collect and convey water from melting snow during the spring freshet, occurring from late April to May. This natural phenomenon significantly influences water levels in Ivanhoe Lake as the winter snows melt and flow into the lake, contributing to the seasonal highs. During the summer months, typically from July to September, the lake experiences a natural drawdown due to evaporation and reduced inflow, marking a transition to lower water levels. The pattern continues into early winter, where the formation of ice sets the stage for further declines.
Why the data matters here
Monitoring water levels at Ivanhoe Lake, as observed by the station "Ivanhoe Lake Near Foleyet," is crucial for understanding the lake’s environmental health and seasonal rhythms. For effective management, comparing current readings to the median for this day—gathered over more than 24 years—provides valuable insight into ongoing trends. This comparison yields a clearer perspective than raw elevation figures alone and allows stakeholders, including cottagers and ecologists, to gauge fluctuations that may affect local ecosystems. The consistent recordings by the Water Survey of Canada ensure that residents and visitors alike can appreciate the changing dynamics of Ivanhoe Lake and its watershed.
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
