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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.

Quebrada Grande at BO. Dos Bocas Water Level

Live river level, flow, historical records and forecast for Quebrada Grande at BO. Dos Bocas in PR, United States, built from official government gauge data.

About Quebrada Grande at BO. Dos Bocas

Quebrada Grande - a lively river shaping its tropical landscape.

The Quebrada Grande flows through the vibrant Eastern Puerto Rico region, known for its lush environment and dynamic hydrology. This river, with its gauge located at BO. Dos Bocas, serves as a vital component of the local ecosystem and contributes significantly to the surrounding watershed.

## The watershed context Quebrada Grande occupies a narrow drainage area of roughly 12.9 square miles, encompassing diverse terrains that can respond rapidly to rainfall. The topography in this region often leads to fast runoff, resulting in swift increases in water levels, especially during heavy rains influenced by tropical systems. The hydrology here is year-round rainfall-driven, which means that residents and visitors must stay alert to the potential for flash flooding, particularly during storm events.

The surrounding bodies of water, including Lago Carite and several quebradas in the area, create a network of waterways that sustain the ecology of Eastern Puerto Rico. Each of these regions interacts with local rainfall patterns, making the area prone to rapid changes in water conditions. This interconnectedness is vital for understanding the overall health and dynamics of the watershed.

## Why the data matters here Real-time data from the USGS gauging station at Quebrada Grande provides critical information about the river's flow levels and conditions. This data not only aids in monitoring flood risks but also supports recreational activities such as fishing and hiking in the region.

Today’s reading can be contextualized by comparing it against the historical median for this date, a vital measure for understanding changes in the river's behavior over time. With 26 years of data collected at this location, the current level offers insights into seasonal variations and helps gauge the impact of recent weather conditions. Keeping track of these fluctuations is essential for local residents who rely on this lively river for both safety and enjoyment.

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