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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.

Rio Gurabo Blw EL Mango Water Level

Live river level, flow, historical records and forecast for Rio Gurabo Blw EL Mango in PR, United States, built from official government gauge data.

About Rio Gurabo Blw EL Mango

Rio Gurabo Blw EL Mango - A vital waterway in Eastern Puerto Rico.

The Rio Gurabo, flowing below El Mango, is a key river within the Eastern Puerto Rico watershed. This region experiences a distinct tropical island hydrology, characterized by rapid precipitation-driven changes, especially during hurricanes and tropical waves. The geography presents steep, short basins which can experience swift increases in water levels, making the monitoring of the Rio Gurabo essential for local safety and ecosystem integrity.

The watershed context

The Rio Gurabo passes through a drainage area of roughly 22.3 square miles. Its tributaries interconnect with notable peers such as Lago Carite and neighboring streams like Quebrada Grande and Rio Bairoa. This network of rivers and creeks forms an intricate hydrological landscape, supporting the local ecology and providing critical resources for surrounding communities.

In Puerto Rico, the rainy season can bring intense flash flooding, and being aware of current water conditions in the Rio Gurabo is vital for agricultural practices and flood preparedness. Though rainfall can vary, the timing of storms is increasingly unpredictable, highlighting the importance of ongoing monitoring and data collection.

Why the data matters here

Monitoring of the Rio Gurabo by the U.S. Geological Survey (USGS) provides crucial real-time data, including discharge measurements, which are necessary for residents, farmers, and emergency management agencies. These measurements help manage risks associated with flooding and water supply variability in the region.

While today's specific reading will fluctuate, it is essential to compare it against the historical median for this day. This context allows for better decision-making regarding daily activities and future preparations. With more than 36 years of record-keeping, the data serves as a reliable gauge of river behavior and trends in the face of changing weather patterns.

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