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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.

Potomac River at Wisconsin Ave, Washington Water Level

Live river level, flow, historical records and forecast for Potomac River at Wisconsin Ave, Washington in DC, United States, built from official government gauge data.

About Potomac River at Wisconsin Ave, Washington

Potomac River - A vital artery of Washington, D.C.

The Potomac River at Wisconsin Ave serves as a central lifeline for the bustling capital of the United States. This stretch of the Potomac is not only a significant geographical feature but also a vital resource for the surrounding communities and ecosystems. Nestled within the heart of the Middle Potomac-Anacostia-Occoquan watershed, it interacts with various smaller streams and rivers, contributing to the intricate hydrology of the region.

Why the data matters here

Monitoring the Potomac River’s water levels provides critical information for local residents, city planners, and environmental scientists alike. Given that this section of the river is prone to fluctuations, understanding its current status is essential for effective flood management and urban planning within Washington D.C. With 17 years of historical data accumulated by the U.S. Geological Survey (USGS), stakeholders can gauge current levels against past trends, offering insights into seasonal changes and extreme weather events that can arise in this area.

Today's reading serves as an important benchmark, allowing residents and officials to compare the river level to the median for this date over the station's historical record. This context is crucial, as it highlights whether current conditions are typical for the time of year or indicative of changing patterns potentially linked to climate variability.

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