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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.

Twelve Mile Creek near Power Glen Water Level

Live river level, flow, historical records and forecast for Twelve Mile Creek near Power Glen in Canada, ON, Canada, built from official government gauge data.

About Twelve Mile Creek near Power Glen

Twelve Mile Creek - a lively tributary in the Niagara watershed.

Twelve Mile Creek flows gracefully near Power Glen, Ontario, weaving its path through the lush landscapes of the Niagara watershed. Draining roughly 47.5 square kilometres, this river is part of a dynamic hydrological network that includes notable peers like the Niagara River and Twenty Mile Creek.

The watershed context

The Niagara watershed is renowned for its seasonal shifts, driven primarily by snowmelt in the spring. The freshet occurs late April through May, during which precipitation and melting snow enhance flow in the creek. Residents and visitors alike can observe the creek's lively runoff transforming the local hydrology. As summer approaches, the natural drawdown occurs from July to September, where flows recede due to evaporation and lower inflow. The cycle continues into early winter, as ice begins to form, signaling a gradual decline in water levels.

Why the data matters here

Understanding the current measurement of Twelve Mile Creek is vital for local stakeholders, including cottagers, anglers, and farmers, who depend on accurate water data for activities and planning. The creek’s flow rates, influenced by its drainage area, contribute to the overall health of the Niagara watershed and its ecological characteristics.

Today’s reading offers insight into the creek's current status by comparing it to the median for this calendar day over the past 20 years. Monitoring this data allows for better comprehension of seasonal trends and immediate conditions, ensuring informed decisions for water use and management. The data is provided by Water Survey of Canada, which oversees the stewardship of this vital resource.

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