Verify your email to receive alerts and history exports.
Favorites
Loading…
Notifications
No active alerts
Set an alert on any lake to get notified when levels change.
The Nibi Dispatch
Water moves. Stay ahead of it.
One email a week — freshet watches, record levels, new regions. Nothing else.
Map

Sign in

Alerts & notifications Get notified when your favorite lakes go outside normal range
Loading…
Your account Email, subscription, and account actions
Loading…
DEV ZONE

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.

Watts Branch at Washington Water Level

Live river level, flow, historical records and forecast for Watts Branch at Washington in DC, United States, built from official government gauge data.

About Watts Branch at Washington

Watts Branch - A vital tributary in the urban landscape of Washington, D.C.

Watts Branch runs through the heart of Washington, D.C., serving as an essential tributary within the larger Middle Potomac-Anacostia-Occoquan watershed. With a drainage area of approximately 3.4 square miles above the monitoring station, it captures rainwater and surface runoff that contributes to the overall health of the Potomac Basin.

The watershed context

This branch, like many others in the Mid-Atlantic region, is influenced by the seasonal rhythms of its environment. Winters and springs often see increased rainfall leading to flooding, particularly in urban areas where impervious surfaces are prevalent. The remnants of tropical systems can also affect water levels, introducing the potential for extreme events. Such hydrological dynamics shape the character of Watts Branch and its surroundings, aligning with the broader trends observed in the Potomac Basin.

The area's proximity to a network of other water bodies enhances the interconnections of the local hydrology. Peers like Accotink Creek and the Anacostia River underscore the watershed's network, contributing to the resilience of the ecosystem and the diverse aquatic habitats that thrive here.

Why the data matters here

Data collected from the USGS monitoring station at Watts Branch provides critical insights into water levels and flow patterns. Today's measurement is instrumental for local stakeholders, including residents, city planners, and environmentalists. The current reading allows for comparisons against long-term historical records, facilitating a better understanding of flood risks and environmental health.

In examining today's reading relative to the median for this date over the past 34 years, we gain valuable context. Tracking water levels in this manner allows for more informed decisions regarding land use, flood preparedness, and conservation efforts. The work of the USGS helps ensure that those who live, work, and engage with the waters of Watts Branch can respond effectively to its ever-changing conditions.

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