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.
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Rainy Lake Water Level
Live lake level, flow, historical records and forecast for Rainy Lake in Rainy River, ON, Canada, built from official government gauge data.
- Location Rainy River, ON, Canada
- Watershed central rainy
- Primary gauge 05PB024 (Water Survey of Canada)
- Gauges monitored 3
About Rainy Lake
Rainy Lake - a vast body of water in Northwestern Ontario.
Rainy Lake is situated in the Rainy River region of Northwestern Ontario, serving as a significant feature of the Central Rainy watershed. This expansive lake spans an impressive area and supports a rich array of aquatic ecosystems. Though it does not have a parent river, its scale and catchment area of approximately 38,210 square kilometres illustrates its role as a critical water source for the surrounding environment.
The watershed context
The Central Rainy watershed is characterized by its snowmelt-driven hydrological patterns. As the snow accumulates throughout the winter, it contributes to a robust spring freshet, typically observed from late April into May. This seasonal surge is vital for replenishing the lake's water levels, creating optimal conditions for local flora and fauna. From July to September, natural summer drawdown occurs as evaporation takes hold, leading to lower water levels as the heat of summer intensifies. As late fall approaches, the onset of ice formation signals an early-winter decline in water levels.
Why the data matters here
Today's observation at Rainy Lake, with data sourced from the Water Survey of Canada, provides a crucial perspective on current water levels compared to the median for this date across 38 years of historical data. Monitoring these variations is essential for understanding seasonal changes and the broader implications for the local ecosystems and communities depending on this vital resource. By focusing on these readings rather than raw elevation figures alone, stakeholders can appreciate the context of today’s measurements within long-term trends, ensuring informed management and conservation efforts in the Central Rainy 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
